Deficits in detection of inversion and eversion movements among subjects with recurrent ankle sprains.
METHODS
Observational cross-sectional design.


OBJECTIVE
To determine whether a deficit exists in the ability to perceive inversion and eversion movements among subjects with recurrent ankle sprains.


BACKGROUND
Although unproven, ankle sprains are thought to recur because proprioception is impaired subsequent to the original sprain. Proprioception has been widely studied, however, the specific property of movement perception has not been rigorously examined for both inversion and eversion movements.


METHODS
The ability to perceive passive inversion and eversion movements imposed at the relaxed ankle was measured in 39 subjects with recurrent ankle sprains (sprainers) and 30 subjects with no history of ankle injury (controls) by an assessor masked to subject group. The 70% detection level for movement perception was determined for 3 velocities, 0.1 degrees/s, 0.5 degrees/s, and 2.5 degrees/s, tested in random order.


RESULTS
The 70% detection level for inversion and eversion movements improved with increasing velocity in both groups. At all velocities, the 70% detection level for movements imposed at the ankle of the sprainers was significantly worse than for controls.


CONCLUSIONS
Perception of passive inversion and eversion movements imposed at the ankle was impaired in subjects with recurrent ankle sprains. The impairment was evident at the 3 velocities tested, 0.1 degrees/s, 0.5 degrees/s, and 2.5 degrees/s.
Refshauge
Kathryn M
KM
University of Sydney, Sydney, NSW, Australia. K.Refshauge@cchs.usyd.edu.au
Kilbreath
Sharon L
SL
Raymond
Jacquelene
J
D000293:Adolescent; D000328:Adult; D016512:Ankle Injuries / Q000503:physiopathology* / Q000534:rehabilitation; D003430:Cross-Sectional Studies; D006801:Humans; D008875:Middle Aged; D009068:Movement / Q000502:physiology*; D026741:Physical Therapy Modalities / Q000379:methods; D011434:Proprioception / Q000502:physiology*; D012008:Recurrence; D012016:Reference Values; D012684:Sensory Thresholds; D013180:Sprains and Strains / Q000503:physiopathology* / Q000534:rehabilitation