Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces.
Sensory stimulation of wrist musculature can enhance stability in the proximal arm and may be a useful therapy aimed at improving arm control post-stroke. Specifically, our prior research indicates tendon vibration can enhance stability during point-to-point arm movements and in tracking tasks. The...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2015-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4669093?pdf=render |
| _version_ | 1828199240000602112 |
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| author | Megan O Conrad Bani Gadhoke Robert A Scheidt Brian D Schmit |
| author_facet | Megan O Conrad Bani Gadhoke Robert A Scheidt Brian D Schmit |
| author_sort | Megan O Conrad |
| collection | DOAJ |
| description | Sensory stimulation of wrist musculature can enhance stability in the proximal arm and may be a useful therapy aimed at improving arm control post-stroke. Specifically, our prior research indicates tendon vibration can enhance stability during point-to-point arm movements and in tracking tasks. The goal of the present study was to investigate the influence of forearm tendon vibration on endpoint stability, measured at the hand, immediately following forward arm movements in an unstable environment. Both proximal and distal workspaces were tested. Ten hemiparetic stroke subjects and 5 healthy controls made forward arm movements while grasping the handle of a two-joint robotic arm. At the end of each movement, the robot applied destabilizing forces. During some trials, 70 Hz vibration was applied to the forearm flexor muscle tendons. 70 Hz was used as the stimulus frequency as it lies within the range of optimal frequencies that activate the muscle spindles at the highest response rate. Endpoint position, velocity, muscle activity and grip force data were compared before, during and after vibration. Stability at the endpoint was quantified as the magnitude of oscillation about the target position, calculated from the power of the tangential velocity data. Prior to vibration, subjects produced unstable, oscillating hand movements about the target location due to the applied force field. Stability increased during vibration, as evidenced by decreased oscillation in hand tangential velocity. |
| first_indexed | 2024-04-12T10:52:07Z |
| format | Article |
| id | doaj.art-8390e1a735284c1e8b252111bee3e250 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-12T10:52:07Z |
| publishDate | 2015-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-8390e1a735284c1e8b252111bee3e2502022-12-22T03:36:11ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-011012e014437710.1371/journal.pone.0144377Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces.Megan O ConradBani GadhokeRobert A ScheidtBrian D SchmitSensory stimulation of wrist musculature can enhance stability in the proximal arm and may be a useful therapy aimed at improving arm control post-stroke. Specifically, our prior research indicates tendon vibration can enhance stability during point-to-point arm movements and in tracking tasks. The goal of the present study was to investigate the influence of forearm tendon vibration on endpoint stability, measured at the hand, immediately following forward arm movements in an unstable environment. Both proximal and distal workspaces were tested. Ten hemiparetic stroke subjects and 5 healthy controls made forward arm movements while grasping the handle of a two-joint robotic arm. At the end of each movement, the robot applied destabilizing forces. During some trials, 70 Hz vibration was applied to the forearm flexor muscle tendons. 70 Hz was used as the stimulus frequency as it lies within the range of optimal frequencies that activate the muscle spindles at the highest response rate. Endpoint position, velocity, muscle activity and grip force data were compared before, during and after vibration. Stability at the endpoint was quantified as the magnitude of oscillation about the target position, calculated from the power of the tangential velocity data. Prior to vibration, subjects produced unstable, oscillating hand movements about the target location due to the applied force field. Stability increased during vibration, as evidenced by decreased oscillation in hand tangential velocity.http://europepmc.org/articles/PMC4669093?pdf=render |
| spellingShingle | Megan O Conrad Bani Gadhoke Robert A Scheidt Brian D Schmit Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces. PLoS ONE |
| title | Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces. |
| title_full | Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces. |
| title_fullStr | Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces. |
| title_full_unstemmed | Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces. |
| title_short | Effect of Tendon Vibration on Hemiparetic Arm Stability in Unstable Workspaces. |
| title_sort | effect of tendon vibration on hemiparetic arm stability in unstable workspaces |
| url | http://europepmc.org/articles/PMC4669093?pdf=render |
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