Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Gabriel Moisan, Vincent Cantin
The purpose of this study was to quantify the effects of two types of foot orthoses (FOs) on muscle activity during walking. Twenty-one healthy participants were recruited to walk on a five-meter walkway with a control condition (no FOs) and two experimental conditions (FOs and FOs with lateral bar). The experimental protocol was performed before and after a one-month period of wear for each experimental condition. Electromyographic signals were recorded for six muscles (gluteus medius, vastus lateralis, medial gastrocnemius, lateral gastrocnemius, peroneus longus and tibialis anterior). Mean muscle activity was analyzed during the contact, the combined midstance/terminal stance and the pre-swing phases of gait. Peak amplitude and time to peak amplitude were quantified during the stance phase. Unacceptable level of variability was observed between the testing sessions. Therefore, no comparisons were performed to compare the effects of the experimental conditions between testing sessions. After a one-month period of wear, FOs with lateral bar decreased peak amplitude and mean activity of the peroneus longus muscle during the combined midstance/terminal stance phase and FOs decreased peak amplitude and mean activity of the tibialis anterior muscle during the contact phase compared to a control condition. In conclusion, repeated-test design should be used with caution when assessing the muscular adaptation to the wear of FOs for a certain period of time. More studies are needed to determine if the decreased activity of the peroneus longus muscle could be of benefit to treat pathologies such as peroneal tendinopathy or lateral ankle instability.
from #Audiology via ola Kala on Inoreader http://ift.tt/1LYdpOT
via IFTTT
Παρασκευή 4 Μαρτίου 2016
Altered postural control strategies in quiet standing more than 20 years after rupture of the anterior cruciate ligament
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Ann-Katrin Stensdotter, Eva Tengman, Charlotte Häger
AimTo explore long-term consequences of anterior cruciate ligament (ACL) rupture on postural sway and control strategies during bilateral quiet standing, in subjects treated with or without reconstructive surgery compared to uninjured controls.Method70 individuals who had unilateral ACL rupture 23±2.4 years ago (33 received ACL reconstructive surgery, ACLR, and 37 had physiotherapy only, ACLPT) and 33 uninjured matched controls (CTRL) (mean age 46 ±5.3) stood quietly with eyes closed for 3minutes on a firm and on a compliant surface, respectively. Center of pressure (CoP) was registered with a force plate and postural sway was calculated from center of mass (CoM) derived from 3D kinematics. Sway density (SD) analyses of CoP assessed distance and duration of stable phases. The torque controlling postural sway was estimated from CoP-CoM.ResultsComparisons across conditions to CTRL revealed larger CoP-CoM-area in ACLR (p=.017, CI: 10.95, 143.10), but not in ACLPT. Mean distance between SD-peaks was greater for ACLR (p<.001, CI: 1.73, 5.31) than for ACLPT (p=.006, CI: 0.56, 4.12) relative to CTRL. Duration of SD-peaks was smaller for both ACLR and ACLPT (p<.001, CI: -4.04, -1.23 and -3.82, -1.03 respectively) compared to CTRL. CoM-area in the ACL-groups did not differ from CTRLConclusionsACL-injured subjects demonstrated greater postural control efforts than CTRL but without significant differences in postural sway. Control efforts were thus not directly associated with sway and further research should be focused on variance in postural control strategies.
from #Audiology via ola Kala on Inoreader http://ift.tt/1TUtn4c
via IFTTT
Source:Gait & Posture
Author(s): Ann-Katrin Stensdotter, Eva Tengman, Charlotte Häger
AimTo explore long-term consequences of anterior cruciate ligament (ACL) rupture on postural sway and control strategies during bilateral quiet standing, in subjects treated with or without reconstructive surgery compared to uninjured controls.Method70 individuals who had unilateral ACL rupture 23±2.4 years ago (33 received ACL reconstructive surgery, ACLR, and 37 had physiotherapy only, ACLPT) and 33 uninjured matched controls (CTRL) (mean age 46 ±5.3) stood quietly with eyes closed for 3minutes on a firm and on a compliant surface, respectively. Center of pressure (CoP) was registered with a force plate and postural sway was calculated from center of mass (CoM) derived from 3D kinematics. Sway density (SD) analyses of CoP assessed distance and duration of stable phases. The torque controlling postural sway was estimated from CoP-CoM.ResultsComparisons across conditions to CTRL revealed larger CoP-CoM-area in ACLR (p=.017, CI: 10.95, 143.10), but not in ACLPT. Mean distance between SD-peaks was greater for ACLR (p<.001, CI: 1.73, 5.31) than for ACLPT (p=.006, CI: 0.56, 4.12) relative to CTRL. Duration of SD-peaks was smaller for both ACLR and ACLPT (p<.001, CI: -4.04, -1.23 and -3.82, -1.03 respectively) compared to CTRL. CoM-area in the ACL-groups did not differ from CTRLConclusionsACL-injured subjects demonstrated greater postural control efforts than CTRL but without significant differences in postural sway. Control efforts were thus not directly associated with sway and further research should be focused on variance in postural control strategies.
from #Audiology via ola Kala on Inoreader http://ift.tt/1TUtn4c
via IFTTT
Specificity of foot configuration during bipedal stance in ballet dancers
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Antonino Casabona, Giuseppa Leonardi, Ettore Aimola, Giovanni La Grua, Cristina Maria Polizzi, Matteo Cioni, Maria Stella Valle
Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations. The balance stability was measured computing the area, the sway path, and the root mean square of the COP motion, whereas the structure of the postural control was assessed by compute approximate entropy, fractal dimension and the mean power frequency. The foot position included common and challenging stances, with the level of difficulty changed across the configurations. Among these conditions, only one foot configuration was familiar to the dancers. Statistically significant differences between the two groups, for all the parameters, were observed only for the stance with the foot position familiar to the dancers. Stability and structural parameters exhibited comparable differences. We concluded that the benefit from classical ballet is limited to a specific foot configuration, regardless of the level of stance difficulty or the component of postural control.
from #Audiology via ola Kala on Inoreader http://ift.tt/1QxkkjS
via IFTTT
Source:Gait & Posture
Author(s): Antonino Casabona, Giuseppa Leonardi, Ettore Aimola, Giovanni La Grua, Cristina Maria Polizzi, Matteo Cioni, Maria Stella Valle
Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations. The balance stability was measured computing the area, the sway path, and the root mean square of the COP motion, whereas the structure of the postural control was assessed by compute approximate entropy, fractal dimension and the mean power frequency. The foot position included common and challenging stances, with the level of difficulty changed across the configurations. Among these conditions, only one foot configuration was familiar to the dancers. Statistically significant differences between the two groups, for all the parameters, were observed only for the stance with the foot position familiar to the dancers. Stability and structural parameters exhibited comparable differences. We concluded that the benefit from classical ballet is limited to a specific foot configuration, regardless of the level of stance difficulty or the component of postural control.
from #Audiology via ola Kala on Inoreader http://ift.tt/1QxkkjS
via IFTTT
Effects of two types of foot orthoses on lower limb muscle activity before and after a one-month period of wear
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Gabriel Moisan, Vincent Cantin
The purpose of this study was to quantify the effects of two types of foot orthoses (FOs) on muscle activity during walking. Twenty-one healthy participants were recruited to walk on a five-meter walkway with a control condition (no FOs) and two experimental conditions (FOs and FOs with lateral bar). The experimental protocol was performed before and after a one-month period of wear for each experimental condition. Electromyographic signals were recorded for six muscles (gluteus medius, vastus lateralis, medial gastrocnemius, lateral gastrocnemius, peroneus longus and tibialis anterior). Mean muscle activity was analyzed during the contact, the combined midstance/terminal stance and the pre-swing phases of gait. Peak amplitude and time to peak amplitude were quantified during the stance phase. Unacceptable level of variability was observed between the testing sessions. Therefore, no comparisons were performed to compare the effects of the experimental conditions between testing sessions. After a one-month period of wear, FOs with lateral bar decreased peak amplitude and mean activity of the peroneus longus muscle during the combined midstance/terminal stance phase and FOs decreased peak amplitude and mean activity of the tibialis anterior muscle during the contact phase compared to a control condition. In conclusion, repeated-test design should be used with caution when assessing the muscular adaptation to the wear of FOs for a certain period of time. More studies are needed to determine if the decreased activity of the peroneus longus muscle could be of benefit to treat pathologies such as peroneal tendinopathy or lateral ankle instability.
from #Audiology via ola Kala on Inoreader http://ift.tt/1LYdpOT
via IFTTT
Source:Gait & Posture
Author(s): Gabriel Moisan, Vincent Cantin
The purpose of this study was to quantify the effects of two types of foot orthoses (FOs) on muscle activity during walking. Twenty-one healthy participants were recruited to walk on a five-meter walkway with a control condition (no FOs) and two experimental conditions (FOs and FOs with lateral bar). The experimental protocol was performed before and after a one-month period of wear for each experimental condition. Electromyographic signals were recorded for six muscles (gluteus medius, vastus lateralis, medial gastrocnemius, lateral gastrocnemius, peroneus longus and tibialis anterior). Mean muscle activity was analyzed during the contact, the combined midstance/terminal stance and the pre-swing phases of gait. Peak amplitude and time to peak amplitude were quantified during the stance phase. Unacceptable level of variability was observed between the testing sessions. Therefore, no comparisons were performed to compare the effects of the experimental conditions between testing sessions. After a one-month period of wear, FOs with lateral bar decreased peak amplitude and mean activity of the peroneus longus muscle during the combined midstance/terminal stance phase and FOs decreased peak amplitude and mean activity of the tibialis anterior muscle during the contact phase compared to a control condition. In conclusion, repeated-test design should be used with caution when assessing the muscular adaptation to the wear of FOs for a certain period of time. More studies are needed to determine if the decreased activity of the peroneus longus muscle could be of benefit to treat pathologies such as peroneal tendinopathy or lateral ankle instability.
from #Audiology via ola Kala on Inoreader http://ift.tt/1LYdpOT
via IFTTT
Altered postural control strategies in quiet standing more than 20 years after rupture of the anterior cruciate ligament
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Ann-Katrin Stensdotter, Eva Tengman, Charlotte Häger
AimTo explore long-term consequences of anterior cruciate ligament (ACL) rupture on postural sway and control strategies during bilateral quiet standing, in subjects treated with or without reconstructive surgery compared to uninjured controls.Method70 individuals who had unilateral ACL rupture 23±2.4 years ago (33 received ACL reconstructive surgery, ACLR, and 37 had physiotherapy only, ACLPT) and 33 uninjured matched controls (CTRL) (mean age 46 ±5.3) stood quietly with eyes closed for 3minutes on a firm and on a compliant surface, respectively. Center of pressure (CoP) was registered with a force plate and postural sway was calculated from center of mass (CoM) derived from 3D kinematics. Sway density (SD) analyses of CoP assessed distance and duration of stable phases. The torque controlling postural sway was estimated from CoP-CoM.ResultsComparisons across conditions to CTRL revealed larger CoP-CoM-area in ACLR (p=.017, CI: 10.95, 143.10), but not in ACLPT. Mean distance between SD-peaks was greater for ACLR (p<.001, CI: 1.73, 5.31) than for ACLPT (p=.006, CI: 0.56, 4.12) relative to CTRL. Duration of SD-peaks was smaller for both ACLR and ACLPT (p<.001, CI: -4.04, -1.23 and -3.82, -1.03 respectively) compared to CTRL. CoM-area in the ACL-groups did not differ from CTRLConclusionsACL-injured subjects demonstrated greater postural control efforts than CTRL but without significant differences in postural sway. Control efforts were thus not directly associated with sway and further research should be focused on variance in postural control strategies.
from #Audiology via ola Kala on Inoreader http://ift.tt/1TUtn4c
via IFTTT
Source:Gait & Posture
Author(s): Ann-Katrin Stensdotter, Eva Tengman, Charlotte Häger
AimTo explore long-term consequences of anterior cruciate ligament (ACL) rupture on postural sway and control strategies during bilateral quiet standing, in subjects treated with or without reconstructive surgery compared to uninjured controls.Method70 individuals who had unilateral ACL rupture 23±2.4 years ago (33 received ACL reconstructive surgery, ACLR, and 37 had physiotherapy only, ACLPT) and 33 uninjured matched controls (CTRL) (mean age 46 ±5.3) stood quietly with eyes closed for 3minutes on a firm and on a compliant surface, respectively. Center of pressure (CoP) was registered with a force plate and postural sway was calculated from center of mass (CoM) derived from 3D kinematics. Sway density (SD) analyses of CoP assessed distance and duration of stable phases. The torque controlling postural sway was estimated from CoP-CoM.ResultsComparisons across conditions to CTRL revealed larger CoP-CoM-area in ACLR (p=.017, CI: 10.95, 143.10), but not in ACLPT. Mean distance between SD-peaks was greater for ACLR (p<.001, CI: 1.73, 5.31) than for ACLPT (p=.006, CI: 0.56, 4.12) relative to CTRL. Duration of SD-peaks was smaller for both ACLR and ACLPT (p<.001, CI: -4.04, -1.23 and -3.82, -1.03 respectively) compared to CTRL. CoM-area in the ACL-groups did not differ from CTRLConclusionsACL-injured subjects demonstrated greater postural control efforts than CTRL but without significant differences in postural sway. Control efforts were thus not directly associated with sway and further research should be focused on variance in postural control strategies.
from #Audiology via ola Kala on Inoreader http://ift.tt/1TUtn4c
via IFTTT
Specificity of foot configuration during bipedal stance in ballet dancers
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Antonino Casabona, Giuseppa Leonardi, Ettore Aimola, Giovanni La Grua, Cristina Maria Polizzi, Matteo Cioni, Maria Stella Valle
Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations. The balance stability was measured computing the area, the sway path, and the root mean square of the COP motion, whereas the structure of the postural control was assessed by compute approximate entropy, fractal dimension and the mean power frequency. The foot position included common and challenging stances, with the level of difficulty changed across the configurations. Among these conditions, only one foot configuration was familiar to the dancers. Statistically significant differences between the two groups, for all the parameters, were observed only for the stance with the foot position familiar to the dancers. Stability and structural parameters exhibited comparable differences. We concluded that the benefit from classical ballet is limited to a specific foot configuration, regardless of the level of stance difficulty or the component of postural control.
from #Audiology via ola Kala on Inoreader http://ift.tt/1QxkkjS
via IFTTT
Source:Gait & Posture
Author(s): Antonino Casabona, Giuseppa Leonardi, Ettore Aimola, Giovanni La Grua, Cristina Maria Polizzi, Matteo Cioni, Maria Stella Valle
Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations. The balance stability was measured computing the area, the sway path, and the root mean square of the COP motion, whereas the structure of the postural control was assessed by compute approximate entropy, fractal dimension and the mean power frequency. The foot position included common and challenging stances, with the level of difficulty changed across the configurations. Among these conditions, only one foot configuration was familiar to the dancers. Statistically significant differences between the two groups, for all the parameters, were observed only for the stance with the foot position familiar to the dancers. Stability and structural parameters exhibited comparable differences. We concluded that the benefit from classical ballet is limited to a specific foot configuration, regardless of the level of stance difficulty or the component of postural control.
from #Audiology via ola Kala on Inoreader http://ift.tt/1QxkkjS
via IFTTT
Effects of two types of foot orthoses on lower limb muscle activity before and after a one-month period of wear
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Gabriel Moisan, Vincent Cantin
The purpose of this study was to quantify the effects of two types of foot orthoses (FOs) on muscle activity during walking. Twenty-one healthy participants were recruited to walk on a five-meter walkway with a control condition (no FOs) and two experimental conditions (FOs and FOs with lateral bar). The experimental protocol was performed before and after a one-month period of wear for each experimental condition. Electromyographic signals were recorded for six muscles (gluteus medius, vastus lateralis, medial gastrocnemius, lateral gastrocnemius, peroneus longus and tibialis anterior). Mean muscle activity was analyzed during the contact, the combined midstance/terminal stance and the pre-swing phases of gait. Peak amplitude and time to peak amplitude were quantified during the stance phase. Unacceptable level of variability was observed between the testing sessions. Therefore, no comparisons were performed to compare the effects of the experimental conditions between testing sessions. After a one-month period of wear, FOs with lateral bar decreased peak amplitude and mean activity of the peroneus longus muscle during the combined midstance/terminal stance phase and FOs decreased peak amplitude and mean activity of the tibialis anterior muscle during the contact phase compared to a control condition. In conclusion, repeated-test design should be used with caution when assessing the muscular adaptation to the wear of FOs for a certain period of time. More studies are needed to determine if the decreased activity of the peroneus longus muscle could be of benefit to treat pathologies such as peroneal tendinopathy or lateral ankle instability.
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1LYdpOT
via IFTTT
Source:Gait & Posture
Author(s): Gabriel Moisan, Vincent Cantin
The purpose of this study was to quantify the effects of two types of foot orthoses (FOs) on muscle activity during walking. Twenty-one healthy participants were recruited to walk on a five-meter walkway with a control condition (no FOs) and two experimental conditions (FOs and FOs with lateral bar). The experimental protocol was performed before and after a one-month period of wear for each experimental condition. Electromyographic signals were recorded for six muscles (gluteus medius, vastus lateralis, medial gastrocnemius, lateral gastrocnemius, peroneus longus and tibialis anterior). Mean muscle activity was analyzed during the contact, the combined midstance/terminal stance and the pre-swing phases of gait. Peak amplitude and time to peak amplitude were quantified during the stance phase. Unacceptable level of variability was observed between the testing sessions. Therefore, no comparisons were performed to compare the effects of the experimental conditions between testing sessions. After a one-month period of wear, FOs with lateral bar decreased peak amplitude and mean activity of the peroneus longus muscle during the combined midstance/terminal stance phase and FOs decreased peak amplitude and mean activity of the tibialis anterior muscle during the contact phase compared to a control condition. In conclusion, repeated-test design should be used with caution when assessing the muscular adaptation to the wear of FOs for a certain period of time. More studies are needed to determine if the decreased activity of the peroneus longus muscle could be of benefit to treat pathologies such as peroneal tendinopathy or lateral ankle instability.
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1LYdpOT
via IFTTT
Altered postural control strategies in quiet standing more than 20 years after rupture of the anterior cruciate ligament
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Ann-Katrin Stensdotter, Eva Tengman, Charlotte Häger
AimTo explore long-term consequences of anterior cruciate ligament (ACL) rupture on postural sway and control strategies during bilateral quiet standing, in subjects treated with or without reconstructive surgery compared to uninjured controls.Method70 individuals who had unilateral ACL rupture 23±2.4 years ago (33 received ACL reconstructive surgery, ACLR, and 37 had physiotherapy only, ACLPT) and 33 uninjured matched controls (CTRL) (mean age 46 ±5.3) stood quietly with eyes closed for 3minutes on a firm and on a compliant surface, respectively. Center of pressure (CoP) was registered with a force plate and postural sway was calculated from center of mass (CoM) derived from 3D kinematics. Sway density (SD) analyses of CoP assessed distance and duration of stable phases. The torque controlling postural sway was estimated from CoP-CoM.ResultsComparisons across conditions to CTRL revealed larger CoP-CoM-area in ACLR (p=.017, CI: 10.95, 143.10), but not in ACLPT. Mean distance between SD-peaks was greater for ACLR (p<.001, CI: 1.73, 5.31) than for ACLPT (p=.006, CI: 0.56, 4.12) relative to CTRL. Duration of SD-peaks was smaller for both ACLR and ACLPT (p<.001, CI: -4.04, -1.23 and -3.82, -1.03 respectively) compared to CTRL. CoM-area in the ACL-groups did not differ from CTRLConclusionsACL-injured subjects demonstrated greater postural control efforts than CTRL but without significant differences in postural sway. Control efforts were thus not directly associated with sway and further research should be focused on variance in postural control strategies.
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1TUtn4c
via IFTTT
Source:Gait & Posture
Author(s): Ann-Katrin Stensdotter, Eva Tengman, Charlotte Häger
AimTo explore long-term consequences of anterior cruciate ligament (ACL) rupture on postural sway and control strategies during bilateral quiet standing, in subjects treated with or without reconstructive surgery compared to uninjured controls.Method70 individuals who had unilateral ACL rupture 23±2.4 years ago (33 received ACL reconstructive surgery, ACLR, and 37 had physiotherapy only, ACLPT) and 33 uninjured matched controls (CTRL) (mean age 46 ±5.3) stood quietly with eyes closed for 3minutes on a firm and on a compliant surface, respectively. Center of pressure (CoP) was registered with a force plate and postural sway was calculated from center of mass (CoM) derived from 3D kinematics. Sway density (SD) analyses of CoP assessed distance and duration of stable phases. The torque controlling postural sway was estimated from CoP-CoM.ResultsComparisons across conditions to CTRL revealed larger CoP-CoM-area in ACLR (p=.017, CI: 10.95, 143.10), but not in ACLPT. Mean distance between SD-peaks was greater for ACLR (p<.001, CI: 1.73, 5.31) than for ACLPT (p=.006, CI: 0.56, 4.12) relative to CTRL. Duration of SD-peaks was smaller for both ACLR and ACLPT (p<.001, CI: -4.04, -1.23 and -3.82, -1.03 respectively) compared to CTRL. CoM-area in the ACL-groups did not differ from CTRLConclusionsACL-injured subjects demonstrated greater postural control efforts than CTRL but without significant differences in postural sway. Control efforts were thus not directly associated with sway and further research should be focused on variance in postural control strategies.
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1TUtn4c
via IFTTT
Specificity of foot configuration during bipedal stance in ballet dancers
Publication date: Available online 3 March 2016
Source:Gait & Posture
Author(s): Antonino Casabona, Giuseppa Leonardi, Ettore Aimola, Giovanni La Grua, Cristina Maria Polizzi, Matteo Cioni, Maria Stella Valle
Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations. The balance stability was measured computing the area, the sway path, and the root mean square of the COP motion, whereas the structure of the postural control was assessed by compute approximate entropy, fractal dimension and the mean power frequency. The foot position included common and challenging stances, with the level of difficulty changed across the configurations. Among these conditions, only one foot configuration was familiar to the dancers. Statistically significant differences between the two groups, for all the parameters, were observed only for the stance with the foot position familiar to the dancers. Stability and structural parameters exhibited comparable differences. We concluded that the benefit from classical ballet is limited to a specific foot configuration, regardless of the level of stance difficulty or the component of postural control.
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1QxkkjS
via IFTTT
Source:Gait & Posture
Author(s): Antonino Casabona, Giuseppa Leonardi, Ettore Aimola, Giovanni La Grua, Cristina Maria Polizzi, Matteo Cioni, Maria Stella Valle
Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations. The balance stability was measured computing the area, the sway path, and the root mean square of the COP motion, whereas the structure of the postural control was assessed by compute approximate entropy, fractal dimension and the mean power frequency. The foot position included common and challenging stances, with the level of difficulty changed across the configurations. Among these conditions, only one foot configuration was familiar to the dancers. Statistically significant differences between the two groups, for all the parameters, were observed only for the stance with the foot position familiar to the dancers. Stability and structural parameters exhibited comparable differences. We concluded that the benefit from classical ballet is limited to a specific foot configuration, regardless of the level of stance difficulty or the component of postural control.
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1QxkkjS
via IFTTT
A comparison between the Dutch and American-English digits-in-noise (DIN) tests in normal-hearing listeners
10.3109/14992027.2015.1137362<br/>Cas Smits
from #Audiology via ola Kala on Inoreader http://ift.tt/1UEjWoU
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1UEjWoU
via IFTTT
The effects of frequency lowering on speech perception in noise with adult hearing-aid users
10.3109/14992027.2015.1137364<br/>Christi W. Miller
from #Audiology via ola Kala on Inoreader http://ift.tt/1nkWjUW
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1nkWjUW
via IFTTT
A comparison between the Dutch and American-English digits-in-noise (DIN) tests in normal-hearing listeners
10.3109/14992027.2015.1137362<br/>Cas Smits
from #Audiology via ola Kala on Inoreader http://ift.tt/1UEjWoU
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1UEjWoU
via IFTTT
The effects of frequency lowering on speech perception in noise with adult hearing-aid users
10.3109/14992027.2015.1137364<br/>Christi W. Miller
from #Audiology via ola Kala on Inoreader http://ift.tt/1nkWjUW
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1nkWjUW
via IFTTT
A comparison between the Dutch and American-English digits-in-noise (DIN) tests in normal-hearing listeners
10.3109/14992027.2015.1137362<br/>Cas Smits
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1p44gjg
via IFTTT
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1p44gjg
via IFTTT
The effects of frequency lowering on speech perception in noise with adult hearing-aid users
10.3109/14992027.2015.1137364<br/>Christi W. Miller
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1VV5Xti
via IFTTT
from #Audiology via xlomafota13 on Inoreader http://ift.tt/1VV5Xti
via IFTTT
A comparison between the Dutch and American-English digits-in-noise (DIN) tests in normal-hearing listeners
10.3109/14992027.2015.1137362<br/>Cas Smits
from #Audiology via ola Kala on Inoreader http://ift.tt/1p44gjg
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1p44gjg
via IFTTT
The effects of frequency lowering on speech perception in noise with adult hearing-aid users
10.3109/14992027.2015.1137364<br/>Christi W. Miller
from #Audiology via ola Kala on Inoreader http://ift.tt/1VV5Xti
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1VV5Xti
via IFTTT
A comparison between the Dutch and American-English digits-in-noise (DIN) tests in normal-hearing listeners
10.3109/14992027.2015.1137362<br/>Cas Smits
from #Audiology via ola Kala on Inoreader http://ift.tt/1p44gjg
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1p44gjg
via IFTTT
The effects of frequency lowering on speech perception in noise with adult hearing-aid users
10.3109/14992027.2015.1137364<br/>Christi W. Miller
from #Audiology via ola Kala on Inoreader http://ift.tt/1VV5Xti
via IFTTT
from #Audiology via ola Kala on Inoreader http://ift.tt/1VV5Xti
via IFTTT
Εγγραφή σε:
Αναρτήσεις (Atom)