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Dynamic-position-sense impairment's independence of perceived knee function in women with ACL reconstruction.

Abstract：

CONTEXT:There is conflicting evidence in the literature regarding whether women with anterior cruciate ligament reconstruction (ACLR) demonstrate impaired proprioception. This study examined dynamic-position-sense accuracy and central-nervous-system (CNS) processing time between those with and without long-term ACLR. OBJECTIVE:To compare proprioception of knee movement in women with ACLR and healthy controls. DESIGN:Cross-sectional. SETTING:Human neuromuscular performance laboratory. PARTICIPANTS:11 women (age 22.64 ± 2.4 y) with ACLR (1.6-5.8 y postsurgery) and 20 women without (age 24.05 ± 1.4 y). INTERVENTIONS:The authors evaluated subjects using 3 methods to assess position sense. During knee flexion at pseudorandomly selected speeds (40°, 60°, 80°, 90°, and 100°/s), subjects indicated with their index finger when their knee reached a predetermined target angle (50°). Accuracy was calculated as an error score. CNS processing time was computed using the time to detect movement and the minimum time of angle indication. Passive and active joint-position sense were also determined at a slow velocity (3°/s) from various knee-joint starting angles. MAIN OUTCOME MEASUREMENTS:Absolute and constant error of target angle, indication accuracy, CNS processing time, and perceived function. RESULTS:Both subject groups showed similar levels of error during dynamic-position-sense testing, despite continued differences in perceived knee function. Estimated CNS processing time was 260 ms for both groups. Joint-position sense during slow active or passive movement did not differ between cohorts. CONCLUSIONS:Control and ACLR subjects demonstrated similar dynamic, passive, and active joint-position-sense error and CNS processing speed even though ACLR subjects reported greater impairment of function. The impairment of proprioception is independent of post-ACLR perception of function.

journal_name

J Sport Rehabil

journal_title

Journal of sport rehabilitation

authors

Littmann AE,Iguchi M,Madhavan S,Kolarik JL,Shields RK

doi

10.1123/jsr.21.1.44

subject

Has Abstract

pub_date

2012-02-01 00:00:00

pages

44-53

issue

eissn

1056-6716

issn

1543-3072

pii

2010-0048

journal_volume

pub_type

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Dynamic-position-sense impairment's independence of perceived knee function in women with ACL reconstruction.