Volume 57, Issue 10, October 2018, Page 721-729
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2PGmPuq
via IFTTT
Σάββατο 3 Νοεμβρίου 2018
Patient preferences in tinnitus outcomes and treatments: a qualitative study
Volume 57, Issue 10, October 2018, Page 784-790
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2RydYZ1
via IFTTT
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2RydYZ1
via IFTTT
A systematic review and meta-analysis assessing the effectiveness of alternative listening devices to conventional hearing aids in adults with hearing loss
Volume 57, Issue 10, October 2018, Page 721-729
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2PGmPuq
via IFTTT
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2PGmPuq
via IFTTT
Patient preferences in tinnitus outcomes and treatments: a qualitative study
Volume 57, Issue 10, October 2018, Page 784-790
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2RydYZ1
via IFTTT
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2RydYZ1
via IFTTT
Pulse-rate discrimination deficit in cochlear implant users: is the upper limit of pitch peripheral or central?
Publication date: Available online 3 November 2018
Source: Hearing Research
Author(s): Ning Zhou, Juliana Mathews, Lixue Dong
ABSTRACT
Cochlear implant (CI) users do not reliably associate increases in pulse rate above 300 pulses per second (pps) with an increase in pitch. The locus of this upper limit of pitch remains unknown. The present study tested the hypothesis that this deficit resides at least initially at the auditory nerve. The hypothesis was tested by comparing pulse rate discrimination in different neural excitation pattern, in which a large versus small population of auditory nerve fibers was activated. If poorer pulse rate discrimination was found under conditions where narrower spread of neural excitation (SOE) was anticipated where a relatively small neural population was activated, then it would support the hypothesis that the rate processing deficit found in CI users is related to peripheral neural degeneration. Nine listeners (12 ears) implanted with the Cochlear Americas Nucleus® devices participated in the study. Different SOE conditions were created by (1) selecting electrodes that showed narrow versus broad forward-masked psychophysical spatial tuning curves, and (2) by measuring these electrodes in monopolar (MP) and narrow bipolar (BP0) electrode configurations. Rate discrimination difference limen (DL) were measured at the selected electrodes in two electrode configurations at three base rates (200, 300 and 500 pps). Consistent with the prediction, group mean DL was better (1) at stimulation sites measured with broader tuning, and (2) in MP relative to BP stimulation. These effects were more salient at the more challenging base rates. There was a weak relationship between rate discrimination (above thresholds) and the effect of rate on detection thresholds. Finally, rate discrimination at rates above the known upper limit (i.e., 500 pps) was correlated with duration of deafness and highly predicted the subjects’ speech recognition performance in noise. These findings support that pulse rate discrimination depends, at least partially, on neural conditions at the auditory periphery and this peripheral limit predicts speech recognition outcomes with a CI.
from #Audiology via ola Kala on Inoreader https://ift.tt/2F1lCde
via IFTTT
The effect of presentation level on spectrotemporal modulation detection
Publication date: Available online 2 November 2018
Source: Hearing Research
Author(s): Sara Magits, Arturo Moncada-Torres, Lieselot Van Deun, Jan Wouters, Astrid van Wieringen, Tom Francart
Abstract
The understanding of speech in noise relies (at least partially) on spectrotemporal modulation sensitivity. This sensitivity can be measured by spectral ripple tests, which can be administered at different presentation levels. However, it is not known how presentation level affects spectrotemporal modulation thresholds. In this work, we present behavioral data for normal-hearing adults which show that at higher ripple densities (2 and 4 ripples/oct), increasing presentation level led to worse discrimination thresholds. Results of a computational model suggested that the higher thresholds could be explained by a worsening of the spectrotemporal representation in the auditory nerve due to broadening of cochlear filters and neural activity saturation. Our results demonstrate the importance of taking presentation level into account when administering spectrotemporal modulation detection tests.
from #Audiology via ola Kala on Inoreader https://ift.tt/2AJtEDn
via IFTTT
Pulse-rate discrimination deficit in cochlear implant users: is the upper limit of pitch peripheral or central?
Publication date: Available online 3 November 2018
Source: Hearing Research
Author(s): Ning Zhou, Juliana Mathews, Lixue Dong
ABSTRACT
Cochlear implant (CI) users do not reliably associate increases in pulse rate above 300 pulses per second (pps) with an increase in pitch. The locus of this upper limit of pitch remains unknown. The present study tested the hypothesis that this deficit resides at least initially at the auditory nerve. The hypothesis was tested by comparing pulse rate discrimination in different neural excitation pattern, in which a large versus small population of auditory nerve fibers was activated. If poorer pulse rate discrimination was found under conditions where narrower spread of neural excitation (SOE) was anticipated where a relatively small neural population was activated, then it would support the hypothesis that the rate processing deficit found in CI users is related to peripheral neural degeneration. Nine listeners (12 ears) implanted with the Cochlear Americas Nucleus® devices participated in the study. Different SOE conditions were created by (1) selecting electrodes that showed narrow versus broad forward-masked psychophysical spatial tuning curves, and (2) by measuring these electrodes in monopolar (MP) and narrow bipolar (BP0) electrode configurations. Rate discrimination difference limen (DL) were measured at the selected electrodes in two electrode configurations at three base rates (200, 300 and 500 pps). Consistent with the prediction, group mean DL was better (1) at stimulation sites measured with broader tuning, and (2) in MP relative to BP stimulation. These effects were more salient at the more challenging base rates. There was a weak relationship between rate discrimination (above thresholds) and the effect of rate on detection thresholds. Finally, rate discrimination at rates above the known upper limit (i.e., 500 pps) was correlated with duration of deafness and highly predicted the subjects’ speech recognition performance in noise. These findings support that pulse rate discrimination depends, at least partially, on neural conditions at the auditory periphery and this peripheral limit predicts speech recognition outcomes with a CI.
from #Audiology via ola Kala on Inoreader https://ift.tt/2F1lCde
via IFTTT
The effect of presentation level on spectrotemporal modulation detection
Publication date: Available online 2 November 2018
Source: Hearing Research
Author(s): Sara Magits, Arturo Moncada-Torres, Lieselot Van Deun, Jan Wouters, Astrid van Wieringen, Tom Francart
Abstract
The understanding of speech in noise relies (at least partially) on spectrotemporal modulation sensitivity. This sensitivity can be measured by spectral ripple tests, which can be administered at different presentation levels. However, it is not known how presentation level affects spectrotemporal modulation thresholds. In this work, we present behavioral data for normal-hearing adults which show that at higher ripple densities (2 and 4 ripples/oct), increasing presentation level led to worse discrimination thresholds. Results of a computational model suggested that the higher thresholds could be explained by a worsening of the spectrotemporal representation in the auditory nerve due to broadening of cochlear filters and neural activity saturation. Our results demonstrate the importance of taking presentation level into account when administering spectrotemporal modulation detection tests.
from #Audiology via ola Kala on Inoreader https://ift.tt/2AJtEDn
via IFTTT
COMPARISON OF OVERHEAD HARNESS CONFIGURATIONS FOR MEASURING TRUNK KINEMATICS DURING TREADMILL DISTURBANCES
Publication date: Available online 3 November 2018
Source: Gait & Posture
Author(s): Emily J. Miller, Kenton R. Kaufman
Abstract
Background
Research has shown that postural perturbation training reduces falls. Trunk kinematics, at recovery step, are key outcome measures. Fall prevention training programs are being developed for routine clinical care. In these programs, the subject is positioned on a treadmill and subjected to forward and backward disturbances which simulate trips and slips. The patient wears a safety vest attached to an overhead harness to create a secure environment. Motion capture is used to measure trunk kinematics.
Research Question
It is important to verify that trunk kinematics are independent of harness configuration. The purpose of this study was to compare the trunk flexion angle and angular velocity at recovery step after forward and backward disturbances on a treadmill measured by motion capture with the harness in both a fixed and free position.
Methods
Ten healthy young adults (5/10 female, age: 29.2 ± 6.3 years, BMI: 24.2 ± 2.4) participated in this study. The subjects had retro-reflective markers placed on key anatomical landmarks to measure trunk kinematics. The participants experienced forward and backward disturbances, which incrementally increased in intensity until the harness clearly supported the subjects for three disturbances in both directions. The order of harness configurations was randomized across subjects and each subject participated in two consecutive rounds of disturbances, one round for each harness configuration. Equivalence testing was performed to demonstrate that the harness configurations were equivalent (α = 0.05).
Results and Significance
The Equivalence Test demonstrated that the trunk angle (TA) and angular velocity (TAV) were equivalent for the different harness configurations. The 95% Confidence Intervals (TA: [-2, 1], TAV: [-18, 16]) were within the equivalence interval (TA: [-3, 3], TAV: [-20, 20]) and the p-Values (TA: 0.008, TAV: 0.034) were less than alpha. Trunk kinematics are independent of overheard harness configurations during treadmill induced disturbances for clinical postural perturbation training.
from #Audiology via ola Kala on Inoreader https://ift.tt/2CXaVFS
via IFTTT
Cognitive and Visual Demands, but not Gross Motor Demand, of Concurrent Smartphone Use Affect Laboratory and Free-living Gait among Young and Older Adults
Publication date: Available online 2 November 2018
Source: Gait & Posture
Author(s): Paphawee Prupetkaew, Vipul Lugade, Teerawat Kamnardsiri, Patima Silsupadol
Abstract
Background
As smartphones are an integral part of daily activities, understanding the underlying mechanism associated with concurrent cell phone use while walking may help reduce the risks of injury.
Research question
This study examined the effect of cognitive, visual, and gross motor demands while using a phone during gait among young and older adults in the laboratory and free-living environments.
Methods
Twelve young and twelve older adults walked along a 10-m walkway under five conditions: single-task walking (Walk), walking and bi-manually holding a phone (Walk-Hold), walking while looking at a phone held in front of the participants (Walk-Look), walking while answering questions (Walk-Answer), and walking while texting (Walk-Text). All conditions were performed in laboratory and free-living environments. Gait velocity, step time, step length, and cadence were obtained using a smartphone with a built-in accelerometer attached to the body. The dual-task cost (DTC) was also assessed. A three-way ANOVA was utilized for all parameters.
Results
While no three-way interactions were found for any parameter, group × condition interactions were significant for gait velocity, step time, step length, cadence and their corresponding DTC. Decreased gait velocity, step length and cadence, with increased step time was demonstrated during Walk-Look, Walk-Answer, and Walk-Text, compared to Walk and Walk-Hold. While older adults markedly changed their gait during Walk-Answer and Walk-Text, these changes were less pronounced among young adults.
Significance
Visual and cognitive demand while concurrently using a phone influenced gait, especially among the elderly. Environment did not accentuate gait alterations during concurrent phone use. Therefore, smartphone technology should be developed to detect dual-task walking and temporarily modify functionality to reduce risk of injury from divided attention.
from #Audiology via ola Kala on Inoreader https://ift.tt/2PaBiPR
via IFTTT
Influence of biological maturity on static and dynamic postural control among male youth soccer players
Publication date: Available online 2 November 2018
Source: Gait & Posture
Author(s): Cornelius John, Anna Lina Rahlf, Daniel Hamacher, Astrid Zech
Abstract
Background
Peak height velocity has been reported to be associated with the phenomenon of adolescent awkwardness, a temporary disruption in motor skills, and an increase in injuries in some adolescents. To date, it is not entirely clear which motor abilities are deficient during the phase of rapid growth.
Research question
We hypothesized that static as well as dynamic postural control is influenced by biological maturation.
Methods
The study was conducted in a prospective, cross-sectional design. Maturity offset, a somatic indicator for biological maturation was captured for n = 99 male soccer players (13.7 ± 0.5 years). Static and dynamic balance were assessed by the Balance Error Scoring System and the Y-Balance Test, respectively. Influences of biological maturation on balance performances have been analyzed by linear mixed models.
Results
Linear mixed model analyses revealed that biological maturation is significantly associated with the total BESS score (p = 0.022, b = 2.195) as well as the YBT anterior (right leg: p = 0.023, b = -0.022; left leg: p = 0.015, b = -0.024) and posteromedial reach directions (left leg: p = 0.02, b = -0.029). No significant associations were found for the other YBT distances.
Significance
Based on our results, maturity seems to have a considerable influence on postural control. It might be that deficits in balance performance contribute to the phenomenon of adolescent awkwardness and therefore lead to an increased injury risk during the adolescent growth spurt. To possibly prevent injuries in youth soccer, biological maturation should be taken into consideration in youth sport coaching.
from #Audiology via ola Kala on Inoreader https://ift.tt/2CXaxqU
via IFTTT
Effects of upper body strength, hand placement and foot placement on ladder fall severity
Publication date: Available online 2 November 2018
Source: Gait & Posture
Author(s): Erika M. Pliner, Na Jin Seo, Viswanathan Ramakrishnan, Kurt E. Beschorner
Abstract
Background
A plurality of fatal falls to lower levels involve ladders. After a slip/misstep on a ladder, climbers use their upper and lower limbs to reestablish contact with the ladder.
Research question
This study investigates the impact of upper body strength, hand placement and foot placement on fall severity after a ladder climbing perturbation.
Methods
Participants performed upper body strength tests (breakaway and grip strength) and climbed a vertical, fixed ladder while a misstep perturbation was applied to the foot. After the perturbation, three hand placement and two foot placement responses were generally observed. Common hand placement responses included the hand moving two rungs, one rung, or did not move to a different rung. Foot placement responses included at least one foot or no feet reestablished contact with the ladder rung(s). Fall severity was quantified by the peak harness force observed after the perturbation.
Results
Increased strength, reestablishing feet on the ladder, and ascending (compared with descending) the ladder was associated with a reduction in fall severity. An interaction effect indicated that the impact of hand placement was altered by climbing direction. Moving the hand one rung during ascent and moving the hand two rungs during descent was associated with an increased fall severity. Failing to maintain hand-rung contact typically led to higher fall severity. Upper body strength assessed using a portable grip dynamometer was sufficient to predict fall severity.
Discussion
This study confirms the multifactor role of the upper body strength, hand placement and foot placement in preventing falls from ladders. Furthermore, a portable dynamometer shows potential to screen for high-risk individuals. Results of this investigation may guide targeted interventions to prevent falls from ladders.
from #Audiology via ola Kala on Inoreader https://ift.tt/2P2Ww22
via IFTTT
COMPARISON OF OVERHEAD HARNESS CONFIGURATIONS FOR MEASURING TRUNK KINEMATICS DURING TREADMILL DISTURBANCES
Publication date: Available online 3 November 2018
Source: Gait & Posture
Author(s): Emily J. Miller, Kenton R. Kaufman
Abstract
Background
Research has shown that postural perturbation training reduces falls. Trunk kinematics, at recovery step, are key outcome measures. Fall prevention training programs are being developed for routine clinical care. In these programs, the subject is positioned on a treadmill and subjected to forward and backward disturbances which simulate trips and slips. The patient wears a safety vest attached to an overhead harness to create a secure environment. Motion capture is used to measure trunk kinematics.
Research Question
It is important to verify that trunk kinematics are independent of harness configuration. The purpose of this study was to compare the trunk flexion angle and angular velocity at recovery step after forward and backward disturbances on a treadmill measured by motion capture with the harness in both a fixed and free position.
Methods
Ten healthy young adults (5/10 female, age: 29.2 ± 6.3 years, BMI: 24.2 ± 2.4) participated in this study. The subjects had retro-reflective markers placed on key anatomical landmarks to measure trunk kinematics. The participants experienced forward and backward disturbances, which incrementally increased in intensity until the harness clearly supported the subjects for three disturbances in both directions. The order of harness configurations was randomized across subjects and each subject participated in two consecutive rounds of disturbances, one round for each harness configuration. Equivalence testing was performed to demonstrate that the harness configurations were equivalent (α = 0.05).
Results and Significance
The Equivalence Test demonstrated that the trunk angle (TA) and angular velocity (TAV) were equivalent for the different harness configurations. The 95% Confidence Intervals (TA: [-2, 1], TAV: [-18, 16]) were within the equivalence interval (TA: [-3, 3], TAV: [-20, 20]) and the p-Values (TA: 0.008, TAV: 0.034) were less than alpha. Trunk kinematics are independent of overheard harness configurations during treadmill induced disturbances for clinical postural perturbation training.
from #Audiology via ola Kala on Inoreader https://ift.tt/2CXaVFS
via IFTTT
Cognitive and Visual Demands, but not Gross Motor Demand, of Concurrent Smartphone Use Affect Laboratory and Free-living Gait among Young and Older Adults
Publication date: Available online 2 November 2018
Source: Gait & Posture
Author(s): Paphawee Prupetkaew, Vipul Lugade, Teerawat Kamnardsiri, Patima Silsupadol
Abstract
Background
As smartphones are an integral part of daily activities, understanding the underlying mechanism associated with concurrent cell phone use while walking may help reduce the risks of injury.
Research question
This study examined the effect of cognitive, visual, and gross motor demands while using a phone during gait among young and older adults in the laboratory and free-living environments.
Methods
Twelve young and twelve older adults walked along a 10-m walkway under five conditions: single-task walking (Walk), walking and bi-manually holding a phone (Walk-Hold), walking while looking at a phone held in front of the participants (Walk-Look), walking while answering questions (Walk-Answer), and walking while texting (Walk-Text). All conditions were performed in laboratory and free-living environments. Gait velocity, step time, step length, and cadence were obtained using a smartphone with a built-in accelerometer attached to the body. The dual-task cost (DTC) was also assessed. A three-way ANOVA was utilized for all parameters.
Results
While no three-way interactions were found for any parameter, group × condition interactions were significant for gait velocity, step time, step length, cadence and their corresponding DTC. Decreased gait velocity, step length and cadence, with increased step time was demonstrated during Walk-Look, Walk-Answer, and Walk-Text, compared to Walk and Walk-Hold. While older adults markedly changed their gait during Walk-Answer and Walk-Text, these changes were less pronounced among young adults.
Significance
Visual and cognitive demand while concurrently using a phone influenced gait, especially among the elderly. Environment did not accentuate gait alterations during concurrent phone use. Therefore, smartphone technology should be developed to detect dual-task walking and temporarily modify functionality to reduce risk of injury from divided attention.
from #Audiology via ola Kala on Inoreader https://ift.tt/2PaBiPR
via IFTTT
Influence of biological maturity on static and dynamic postural control among male youth soccer players
Publication date: Available online 2 November 2018
Source: Gait & Posture
Author(s): Cornelius John, Anna Lina Rahlf, Daniel Hamacher, Astrid Zech
Abstract
Background
Peak height velocity has been reported to be associated with the phenomenon of adolescent awkwardness, a temporary disruption in motor skills, and an increase in injuries in some adolescents. To date, it is not entirely clear which motor abilities are deficient during the phase of rapid growth.
Research question
We hypothesized that static as well as dynamic postural control is influenced by biological maturation.
Methods
The study was conducted in a prospective, cross-sectional design. Maturity offset, a somatic indicator for biological maturation was captured for n = 99 male soccer players (13.7 ± 0.5 years). Static and dynamic balance were assessed by the Balance Error Scoring System and the Y-Balance Test, respectively. Influences of biological maturation on balance performances have been analyzed by linear mixed models.
Results
Linear mixed model analyses revealed that biological maturation is significantly associated with the total BESS score (p = 0.022, b = 2.195) as well as the YBT anterior (right leg: p = 0.023, b = -0.022; left leg: p = 0.015, b = -0.024) and posteromedial reach directions (left leg: p = 0.02, b = -0.029). No significant associations were found for the other YBT distances.
Significance
Based on our results, maturity seems to have a considerable influence on postural control. It might be that deficits in balance performance contribute to the phenomenon of adolescent awkwardness and therefore lead to an increased injury risk during the adolescent growth spurt. To possibly prevent injuries in youth soccer, biological maturation should be taken into consideration in youth sport coaching.
from #Audiology via ola Kala on Inoreader https://ift.tt/2CXaxqU
via IFTTT
Effects of upper body strength, hand placement and foot placement on ladder fall severity
Publication date: Available online 2 November 2018
Source: Gait & Posture
Author(s): Erika M. Pliner, Na Jin Seo, Viswanathan Ramakrishnan, Kurt E. Beschorner
Abstract
Background
A plurality of fatal falls to lower levels involve ladders. After a slip/misstep on a ladder, climbers use their upper and lower limbs to reestablish contact with the ladder.
Research question
This study investigates the impact of upper body strength, hand placement and foot placement on fall severity after a ladder climbing perturbation.
Methods
Participants performed upper body strength tests (breakaway and grip strength) and climbed a vertical, fixed ladder while a misstep perturbation was applied to the foot. After the perturbation, three hand placement and two foot placement responses were generally observed. Common hand placement responses included the hand moving two rungs, one rung, or did not move to a different rung. Foot placement responses included at least one foot or no feet reestablished contact with the ladder rung(s). Fall severity was quantified by the peak harness force observed after the perturbation.
Results
Increased strength, reestablishing feet on the ladder, and ascending (compared with descending) the ladder was associated with a reduction in fall severity. An interaction effect indicated that the impact of hand placement was altered by climbing direction. Moving the hand one rung during ascent and moving the hand two rungs during descent was associated with an increased fall severity. Failing to maintain hand-rung contact typically led to higher fall severity. Upper body strength assessed using a portable grip dynamometer was sufficient to predict fall severity.
Discussion
This study confirms the multifactor role of the upper body strength, hand placement and foot placement in preventing falls from ladders. Furthermore, a portable dynamometer shows potential to screen for high-risk individuals. Results of this investigation may guide targeted interventions to prevent falls from ladders.
from #Audiology via ola Kala on Inoreader https://ift.tt/2P2Ww22
via IFTTT
Pulse-rate discrimination deficit in cochlear implant users: is the upper limit of pitch peripheral or central?
Publication date: Available online 3 November 2018
Source: Hearing Research
Author(s): Ning Zhou, Juliana Mathews, Lixue Dong
ABSTRACT
Cochlear implant (CI) users do not reliably associate increases in pulse rate above 300 pulses per second (pps) with an increase in pitch. The locus of this upper limit of pitch remains unknown. The present study tested the hypothesis that this deficit resides at least initially at the auditory nerve. The hypothesis was tested by comparing pulse rate discrimination in different neural excitation pattern, in which a large versus small population of auditory nerve fibers was activated. If poorer pulse rate discrimination was found under conditions where narrower spread of neural excitation (SOE) was anticipated where a relatively small neural population was activated, then it would support the hypothesis that the rate processing deficit found in CI users is related to peripheral neural degeneration. Nine listeners (12 ears) implanted with the Cochlear Americas Nucleus® devices participated in the study. Different SOE conditions were created by (1) selecting electrodes that showed narrow versus broad forward-masked psychophysical spatial tuning curves, and (2) by measuring these electrodes in monopolar (MP) and narrow bipolar (BP0) electrode configurations. Rate discrimination difference limen (DL) were measured at the selected electrodes in two electrode configurations at three base rates (200, 300 and 500 pps). Consistent with the prediction, group mean DL was better (1) at stimulation sites measured with broader tuning, and (2) in MP relative to BP stimulation. These effects were more salient at the more challenging base rates. There was a weak relationship between rate discrimination (above thresholds) and the effect of rate on detection thresholds. Finally, rate discrimination at rates above the known upper limit (i.e., 500 pps) was correlated with duration of deafness and highly predicted the subjects’ speech recognition performance in noise. These findings support that pulse rate discrimination depends, at least partially, on neural conditions at the auditory periphery and this peripheral limit predicts speech recognition outcomes with a CI.
from #Audiology via ola Kala on Inoreader https://ift.tt/2F1lCde
via IFTTT
The effect of presentation level on spectrotemporal modulation detection
Publication date: Available online 2 November 2018
Source: Hearing Research
Author(s): Sara Magits, Arturo Moncada-Torres, Lieselot Van Deun, Jan Wouters, Astrid van Wieringen, Tom Francart
Abstract
The understanding of speech in noise relies (at least partially) on spectrotemporal modulation sensitivity. This sensitivity can be measured by spectral ripple tests, which can be administered at different presentation levels. However, it is not known how presentation level affects spectrotemporal modulation thresholds. In this work, we present behavioral data for normal-hearing adults which show that at higher ripple densities (2 and 4 ripples/oct), increasing presentation level led to worse discrimination thresholds. Results of a computational model suggested that the higher thresholds could be explained by a worsening of the spectrotemporal representation in the auditory nerve due to broadening of cochlear filters and neural activity saturation. Our results demonstrate the importance of taking presentation level into account when administering spectrotemporal modulation detection tests.
from #Audiology via ola Kala on Inoreader https://ift.tt/2AJtEDn
via IFTTT
Pulse-rate discrimination deficit in cochlear implant users: is the upper limit of pitch peripheral or central?
Publication date: Available online 3 November 2018
Source: Hearing Research
Author(s): Ning Zhou, Juliana Mathews, Lixue Dong
ABSTRACT
Cochlear implant (CI) users do not reliably associate increases in pulse rate above 300 pulses per second (pps) with an increase in pitch. The locus of this upper limit of pitch remains unknown. The present study tested the hypothesis that this deficit resides at least initially at the auditory nerve. The hypothesis was tested by comparing pulse rate discrimination in different neural excitation pattern, in which a large versus small population of auditory nerve fibers was activated. If poorer pulse rate discrimination was found under conditions where narrower spread of neural excitation (SOE) was anticipated where a relatively small neural population was activated, then it would support the hypothesis that the rate processing deficit found in CI users is related to peripheral neural degeneration. Nine listeners (12 ears) implanted with the Cochlear Americas Nucleus® devices participated in the study. Different SOE conditions were created by (1) selecting electrodes that showed narrow versus broad forward-masked psychophysical spatial tuning curves, and (2) by measuring these electrodes in monopolar (MP) and narrow bipolar (BP0) electrode configurations. Rate discrimination difference limen (DL) were measured at the selected electrodes in two electrode configurations at three base rates (200, 300 and 500 pps). Consistent with the prediction, group mean DL was better (1) at stimulation sites measured with broader tuning, and (2) in MP relative to BP stimulation. These effects were more salient at the more challenging base rates. There was a weak relationship between rate discrimination (above thresholds) and the effect of rate on detection thresholds. Finally, rate discrimination at rates above the known upper limit (i.e., 500 pps) was correlated with duration of deafness and highly predicted the subjects’ speech recognition performance in noise. These findings support that pulse rate discrimination depends, at least partially, on neural conditions at the auditory periphery and this peripheral limit predicts speech recognition outcomes with a CI.
from #Audiology via ola Kala on Inoreader https://ift.tt/2F1lCde
via IFTTT
The effect of presentation level on spectrotemporal modulation detection
Publication date: Available online 2 November 2018
Source: Hearing Research
Author(s): Sara Magits, Arturo Moncada-Torres, Lieselot Van Deun, Jan Wouters, Astrid van Wieringen, Tom Francart
Abstract
The understanding of speech in noise relies (at least partially) on spectrotemporal modulation sensitivity. This sensitivity can be measured by spectral ripple tests, which can be administered at different presentation levels. However, it is not known how presentation level affects spectrotemporal modulation thresholds. In this work, we present behavioral data for normal-hearing adults which show that at higher ripple densities (2 and 4 ripples/oct), increasing presentation level led to worse discrimination thresholds. Results of a computational model suggested that the higher thresholds could be explained by a worsening of the spectrotemporal representation in the auditory nerve due to broadening of cochlear filters and neural activity saturation. Our results demonstrate the importance of taking presentation level into account when administering spectrotemporal modulation detection tests.
from #Audiology via ola Kala on Inoreader https://ift.tt/2AJtEDn
via IFTTT
A systematic review and meta-analysis assessing the effectiveness of alternative listening devices to conventional hearing aids in adults with hearing loss
Volume 57, Issue 10, October 2018, Page 721-729
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2qrAVlq
via IFTTT
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2qrAVlq
via IFTTT
Patient preferences in tinnitus outcomes and treatments: a qualitative study
Volume 57, Issue 10, October 2018, Page 784-790
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2QgOQGd
via IFTTT
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2QgOQGd
via IFTTT
A systematic review and meta-analysis assessing the effectiveness of alternative listening devices to conventional hearing aids in adults with hearing loss
Volume 57, Issue 10, October 2018, Page 721-729
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2qrAVlq
via IFTTT
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2qrAVlq
via IFTTT
Patient preferences in tinnitus outcomes and treatments: a qualitative study
Volume 57, Issue 10, October 2018, Page 784-790
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2QgOQGd
via IFTTT
.
from #Audiology via ola Kala on Inoreader https://ift.tt/2QgOQGd
via IFTTT
Hearing Loss a Risk for Hospital Readmission
Adults aged 65 and over with hearing loss are more likely to be readmitted to the hospital compared to those with normal hearing, a new study found (J Am Geriatr Soc. 2018 Oct 5. doi: 10.1111/jgs.15545. [Epub ahead of print]). Researchers from New York University identified 4,436 patients 65 and older who reported difficulty communicating with health care personnel due to their hearing loss, and compared the hospitalization experiences of those with and those without this difficulty. They found that those with difficulty communicating had a 32 percent increase in the likelihood of being readmitted within 30 days after accounting for age, number of medical problems, and other sociodemographic factors.
Jan Blustein, MD, PhD, a professor of health policy and medicine at NYU's Robert F. Wagner Graduate School of Public Service and a senior author of the study, said hospitals are noisy, chaotic places, and people with hearing loss may have trouble understanding key information, such as what medicines they should take after discharge or how they should watch for or manage exacerbation of their symptoms. "This puts them at risk for difficulties after they are discharged from the hospital," he said in a press release. Blustein also noted that there are several low-cost technological approaches to helping older people with hearing loss to hear better, but few hospitals use them. "We hope that our research will help raise awareness of the potential to improve patient care by attending to hearing loss," he said.
Published: 11/2/2018 9:57:00 AM
from #Audiology via ola Kala on Inoreader https://ift.tt/2D0jEXZ
via IFTTT
Hearing Loss a Risk for Hospital Readmission
Adults aged 65 and over with hearing loss are more likely to be readmitted to the hospital compared to those with normal hearing, a new study found (J Am Geriatr Soc. 2018 Oct 5. doi: 10.1111/jgs.15545. [Epub ahead of print]). Researchers from New York University identified 4,436 patients 65 and older who reported difficulty communicating with health care personnel due to their hearing loss, and compared the hospitalization experiences of those with and those without this difficulty. They found that those with difficulty communicating had a 32 percent increase in the likelihood of being readmitted within 30 days after accounting for age, number of medical problems, and other sociodemographic factors.
Jan Blustein, MD, PhD, a professor of health policy and medicine at NYU's Robert F. Wagner Graduate School of Public Service and a senior author of the study, said hospitals are noisy, chaotic places, and people with hearing loss may have trouble understanding key information, such as what medicines they should take after discharge or how they should watch for or manage exacerbation of their symptoms. "This puts them at risk for difficulties after they are discharged from the hospital," he said in a press release. Blustein also noted that there are several low-cost technological approaches to helping older people with hearing loss to hear better, but few hospitals use them. "We hope that our research will help raise awareness of the potential to improve patient care by attending to hearing loss," he said.
Published: 11/2/2018 9:57:00 AM
from #Audiology via ola Kala on Inoreader https://ift.tt/2D0jEXZ
via IFTTT
Εγγραφή σε:
Αναρτήσεις (Atom)