Related Experiment Videos
Proprioception during manual aiming in individuals with shoulder instability and controls
1J.C. Kennedy Athletic Injuries Clinic, University of Western Ontario, London, Canada.
The Journal of Orthopaedic and Sports Physical Therapy
|February 1, 1996
Summary
Individuals with recurrent shoulder instability may have impaired joint proprioception. This study found a proprioceptive deficit in shoulder instability patients, particularly when sensory input was reduced, impacting arm movement control.
Area of Science:
- Orthopaedics
- Neuroscience
- Biomechanics
Background:
- Recurrent glenohumeral joint instability is a prevalent issue.
- A potential cause is impaired neuromuscular control and proprioception.
Purpose of the Study:
- To investigate proprioceptive deficits in patients with recurrent anterior glenohumeral instability.
- To compare joint sense in unstable shoulders versus healthy shoulders.
Main Methods:
- Subjects performed pointing movements with their uninjured limb and matched positions with the affected limb.
- Three-dimensional optoelectric movement analysis tracked limb trajectories.
- Testing occurred under conditions of full vision, no vision, and no vision with posterior deltoid vibration.
Main Results:
- No significant differences in temporal or spatial measures between groups.
- A performance decrement in arm trajectory formation was observed in the instability group during the no vision with vibration condition.
Conclusions:
- Subjects with recurrent anterior glenohumeral instability exhibit a proprioceptive deficit.
- This deficit is most apparent when visual and tactile sensory feedback is diminished.