Publication date: October 2016
Source:Gait & Posture, Volume 50
Author(s): Céline Schreiber, Angélique Remacle, Frédéric Chantraine, Elizabeth Kolanowski, Florent Moissenet
The direct effects of a rhythmic auditory stimulation (RAS) on the gait of asymptomatic subjects are not clear. Previous studies only showed modifications in the gastrocnemius activity, inconsistent effects on temporal parameters, and no modification of spatial parameters. Furthermore, the influence of RAS on kinematics and kinetics has only been reported in pathological gait. The objective of this study was to perform a full comparison of gait characteristics in asymptomatic subjects at preferred and reduced walking speed between without and with RAS conditions. Spatiotemporal parameters, kinematics, kinetics and EMG signals datasets were collected for each condition. RAS conditions were obtained by asking subjects to walk on metronomic beats. 17 asymptomatic subjects were included in the study (12M/5W, 37.4±15.7years, 74.0±14.8kg, 1.77±0.09m). Comparisons between without and with RAS conditions were then performed using the Statistical Parametric Mapping method. For all combined subjects, the effect of RAS was limited whatever the walking speed. Meanwhile, global effects were observed for kinematics, kinetics and EMG at both spontaneous and reduced walking speed, which can only be explained by covariances (i.e., no effect on individual time-series). The use of RAS to impose a specific cadence matching the desired walking speed (e.g., to collect normative data) appears thus possible, as none parameters were modified individually. However, RAS should be used with caution taking into account covariances (i.e., muscle synergy or joint coordination patterns). This study has to be extended to a larger number of subjects to confirm these observations.
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Δευτέρα 22 Αυγούστου 2016
Quantifying accommodation to prosthesis interventions in persons with lower limb loss
Publication date: October 2016
Source:Gait & Posture, Volume 50
Author(s): Goeran Fiedler, Xueyi Zhang
Determining the appropriate amount of accommodation time is an important component of research protocol design in the field of limb prosthetics. Insufficiently short or excessively long accommodation periods may limit the external validity of findings and/or the economic efficiency and ethical innocuousness of a study. However, issuing general recommendations is difficult, as individual accommodation periods are affected by subject characteristics, the nature of the intervention, and possibly a number of environmental factors.We are discussing an approach to determine individual accommodation times based on the assumption that the process of becoming accustomed to a prosthetic intervention follows a similar exponential “learning curve” as many other learning processes that have been previously investigated. Initial data collected with a small subject sample gives some indication that gait cycle symmetry changes along the hypothesized curve trajectory. If those preliminary results can be confirmed it may be possible to extrapolate a subject’s eventual level of accommodation based on a small data set that is easily collected during the first twenty minutes after introducing a prosthetic intervention.
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Source:Gait & Posture, Volume 50
Author(s): Goeran Fiedler, Xueyi Zhang
Determining the appropriate amount of accommodation time is an important component of research protocol design in the field of limb prosthetics. Insufficiently short or excessively long accommodation periods may limit the external validity of findings and/or the economic efficiency and ethical innocuousness of a study. However, issuing general recommendations is difficult, as individual accommodation periods are affected by subject characteristics, the nature of the intervention, and possibly a number of environmental factors.We are discussing an approach to determine individual accommodation times based on the assumption that the process of becoming accustomed to a prosthetic intervention follows a similar exponential “learning curve” as many other learning processes that have been previously investigated. Initial data collected with a small subject sample gives some indication that gait cycle symmetry changes along the hypothesized curve trajectory. If those preliminary results can be confirmed it may be possible to extrapolate a subject’s eventual level of accommodation based on a small data set that is easily collected during the first twenty minutes after introducing a prosthetic intervention.
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Influence of a rhythmic auditory stimulation on asymptomatic gait
Publication date: October 2016
Source:Gait & Posture, Volume 50
Author(s): Céline Schreiber, Angélique Remacle, Frédéric Chantraine, Elizabeth Kolanowski, Florent Moissenet
The direct effects of a rhythmic auditory stimulation (RAS) on the gait of asymptomatic subjects are not clear. Previous studies only showed modifications in the gastrocnemius activity, inconsistent effects on temporal parameters, and no modification of spatial parameters. Furthermore, the influence of RAS on kinematics and kinetics has only been reported in pathological gait. The objective of this study was to perform a full comparison of gait characteristics in asymptomatic subjects at preferred and reduced walking speed between without and with RAS conditions. Spatiotemporal parameters, kinematics, kinetics and EMG signals datasets were collected for each condition. RAS conditions were obtained by asking subjects to walk on metronomic beats. 17 asymptomatic subjects were included in the study (12M/5W, 37.4±15.7years, 74.0±14.8kg, 1.77±0.09m). Comparisons between without and with RAS conditions were then performed using the Statistical Parametric Mapping method. For all combined subjects, the effect of RAS was limited whatever the walking speed. Meanwhile, global effects were observed for kinematics, kinetics and EMG at both spontaneous and reduced walking speed, which can only be explained by covariances (i.e., no effect on individual time-series). The use of RAS to impose a specific cadence matching the desired walking speed (e.g., to collect normative data) appears thus possible, as none parameters were modified individually. However, RAS should be used with caution taking into account covariances (i.e., muscle synergy or joint coordination patterns). This study has to be extended to a larger number of subjects to confirm these observations.
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Source:Gait & Posture, Volume 50
Author(s): Céline Schreiber, Angélique Remacle, Frédéric Chantraine, Elizabeth Kolanowski, Florent Moissenet
The direct effects of a rhythmic auditory stimulation (RAS) on the gait of asymptomatic subjects are not clear. Previous studies only showed modifications in the gastrocnemius activity, inconsistent effects on temporal parameters, and no modification of spatial parameters. Furthermore, the influence of RAS on kinematics and kinetics has only been reported in pathological gait. The objective of this study was to perform a full comparison of gait characteristics in asymptomatic subjects at preferred and reduced walking speed between without and with RAS conditions. Spatiotemporal parameters, kinematics, kinetics and EMG signals datasets were collected for each condition. RAS conditions were obtained by asking subjects to walk on metronomic beats. 17 asymptomatic subjects were included in the study (12M/5W, 37.4±15.7years, 74.0±14.8kg, 1.77±0.09m). Comparisons between without and with RAS conditions were then performed using the Statistical Parametric Mapping method. For all combined subjects, the effect of RAS was limited whatever the walking speed. Meanwhile, global effects were observed for kinematics, kinetics and EMG at both spontaneous and reduced walking speed, which can only be explained by covariances (i.e., no effect on individual time-series). The use of RAS to impose a specific cadence matching the desired walking speed (e.g., to collect normative data) appears thus possible, as none parameters were modified individually. However, RAS should be used with caution taking into account covariances (i.e., muscle synergy or joint coordination patterns). This study has to be extended to a larger number of subjects to confirm these observations.
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Quantifying accommodation to prosthesis interventions in persons with lower limb loss
Publication date: October 2016
Source:Gait & Posture, Volume 50
Author(s): Goeran Fiedler, Xueyi Zhang
Determining the appropriate amount of accommodation time is an important component of research protocol design in the field of limb prosthetics. Insufficiently short or excessively long accommodation periods may limit the external validity of findings and/or the economic efficiency and ethical innocuousness of a study. However, issuing general recommendations is difficult, as individual accommodation periods are affected by subject characteristics, the nature of the intervention, and possibly a number of environmental factors.We are discussing an approach to determine individual accommodation times based on the assumption that the process of becoming accustomed to a prosthetic intervention follows a similar exponential “learning curve” as many other learning processes that have been previously investigated. Initial data collected with a small subject sample gives some indication that gait cycle symmetry changes along the hypothesized curve trajectory. If those preliminary results can be confirmed it may be possible to extrapolate a subject’s eventual level of accommodation based on a small data set that is easily collected during the first twenty minutes after introducing a prosthetic intervention.
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Source:Gait & Posture, Volume 50
Author(s): Goeran Fiedler, Xueyi Zhang
Determining the appropriate amount of accommodation time is an important component of research protocol design in the field of limb prosthetics. Insufficiently short or excessively long accommodation periods may limit the external validity of findings and/or the economic efficiency and ethical innocuousness of a study. However, issuing general recommendations is difficult, as individual accommodation periods are affected by subject characteristics, the nature of the intervention, and possibly a number of environmental factors.We are discussing an approach to determine individual accommodation times based on the assumption that the process of becoming accustomed to a prosthetic intervention follows a similar exponential “learning curve” as many other learning processes that have been previously investigated. Initial data collected with a small subject sample gives some indication that gait cycle symmetry changes along the hypothesized curve trajectory. If those preliminary results can be confirmed it may be possible to extrapolate a subject’s eventual level of accommodation based on a small data set that is easily collected during the first twenty minutes after introducing a prosthetic intervention.
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Influence of a rhythmic auditory stimulation on asymptomatic gait
Publication date: October 2016
Source:Gait & Posture, Volume 50
Author(s): Céline Schreiber, Angélique Remacle, Frédéric Chantraine, Elizabeth Kolanowski, Florent Moissenet
The direct effects of a rhythmic auditory stimulation (RAS) on the gait of asymptomatic subjects are not clear. Previous studies only showed modifications in the gastrocnemius activity, inconsistent effects on temporal parameters, and no modification of spatial parameters. Furthermore, the influence of RAS on kinematics and kinetics has only been reported in pathological gait. The objective of this study was to perform a full comparison of gait characteristics in asymptomatic subjects at preferred and reduced walking speed between without and with RAS conditions. Spatiotemporal parameters, kinematics, kinetics and EMG signals datasets were collected for each condition. RAS conditions were obtained by asking subjects to walk on metronomic beats. 17 asymptomatic subjects were included in the study (12M/5W, 37.4±15.7years, 74.0±14.8kg, 1.77±0.09m). Comparisons between without and with RAS conditions were then performed using the Statistical Parametric Mapping method. For all combined subjects, the effect of RAS was limited whatever the walking speed. Meanwhile, global effects were observed for kinematics, kinetics and EMG at both spontaneous and reduced walking speed, which can only be explained by covariances (i.e., no effect on individual time-series). The use of RAS to impose a specific cadence matching the desired walking speed (e.g., to collect normative data) appears thus possible, as none parameters were modified individually. However, RAS should be used with caution taking into account covariances (i.e., muscle synergy or joint coordination patterns). This study has to be extended to a larger number of subjects to confirm these observations.
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via IFTTT
Source:Gait & Posture, Volume 50
Author(s): Céline Schreiber, Angélique Remacle, Frédéric Chantraine, Elizabeth Kolanowski, Florent Moissenet
The direct effects of a rhythmic auditory stimulation (RAS) on the gait of asymptomatic subjects are not clear. Previous studies only showed modifications in the gastrocnemius activity, inconsistent effects on temporal parameters, and no modification of spatial parameters. Furthermore, the influence of RAS on kinematics and kinetics has only been reported in pathological gait. The objective of this study was to perform a full comparison of gait characteristics in asymptomatic subjects at preferred and reduced walking speed between without and with RAS conditions. Spatiotemporal parameters, kinematics, kinetics and EMG signals datasets were collected for each condition. RAS conditions were obtained by asking subjects to walk on metronomic beats. 17 asymptomatic subjects were included in the study (12M/5W, 37.4±15.7years, 74.0±14.8kg, 1.77±0.09m). Comparisons between without and with RAS conditions were then performed using the Statistical Parametric Mapping method. For all combined subjects, the effect of RAS was limited whatever the walking speed. Meanwhile, global effects were observed for kinematics, kinetics and EMG at both spontaneous and reduced walking speed, which can only be explained by covariances (i.e., no effect on individual time-series). The use of RAS to impose a specific cadence matching the desired walking speed (e.g., to collect normative data) appears thus possible, as none parameters were modified individually. However, RAS should be used with caution taking into account covariances (i.e., muscle synergy or joint coordination patterns). This study has to be extended to a larger number of subjects to confirm these observations.
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via IFTTT
Quantifying accommodation to prosthesis interventions in persons with lower limb loss
Publication date: October 2016
Source:Gait & Posture, Volume 50
Author(s): Goeran Fiedler, Xueyi Zhang
Determining the appropriate amount of accommodation time is an important component of research protocol design in the field of limb prosthetics. Insufficiently short or excessively long accommodation periods may limit the external validity of findings and/or the economic efficiency and ethical innocuousness of a study. However, issuing general recommendations is difficult, as individual accommodation periods are affected by subject characteristics, the nature of the intervention, and possibly a number of environmental factors.We are discussing an approach to determine individual accommodation times based on the assumption that the process of becoming accustomed to a prosthetic intervention follows a similar exponential “learning curve” as many other learning processes that have been previously investigated. Initial data collected with a small subject sample gives some indication that gait cycle symmetry changes along the hypothesized curve trajectory. If those preliminary results can be confirmed it may be possible to extrapolate a subject’s eventual level of accommodation based on a small data set that is easily collected during the first twenty minutes after introducing a prosthetic intervention.
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Source:Gait & Posture, Volume 50
Author(s): Goeran Fiedler, Xueyi Zhang
Determining the appropriate amount of accommodation time is an important component of research protocol design in the field of limb prosthetics. Insufficiently short or excessively long accommodation periods may limit the external validity of findings and/or the economic efficiency and ethical innocuousness of a study. However, issuing general recommendations is difficult, as individual accommodation periods are affected by subject characteristics, the nature of the intervention, and possibly a number of environmental factors.We are discussing an approach to determine individual accommodation times based on the assumption that the process of becoming accustomed to a prosthetic intervention follows a similar exponential “learning curve” as many other learning processes that have been previously investigated. Initial data collected with a small subject sample gives some indication that gait cycle symmetry changes along the hypothesized curve trajectory. If those preliminary results can be confirmed it may be possible to extrapolate a subject’s eventual level of accommodation based on a small data set that is easily collected during the first twenty minutes after introducing a prosthetic intervention.
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Κυριακή 21 Αυγούστου 2016
Wireless Technology: Where Have We Been? Where Are We Now? Where Are We Going?
Within the last several years, many wireless technological advances have occurred within the hearing aid industry. These advances include the concept of near field magnetic induction, followed by Bluetooth (i.e., radio frequency transmissions, or RF), and other proprietary radio frequency transmissions. 
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