Thigh muscle activity and anterior cruciate ligament insufficiency

Z. Dvir; G. Eger; N. Halperin; A. Shklar

doi:10.1016/0268-0033(89)90044-2

Thigh muscle activity and anterior cruciate ligament insufficiency

Z. Dvir^*, G. Eger, N. Halperin, A. Shklar

^*Corresponding author for this work

Department of Physical Therapy

Research output: Contribution to journal › Article › peer-review

105 Scopus citations

Abstract

The purpose of this study was to examine the dynamic relationship between the quadriceps femoris and hamstrings in anterior cruciate ligament (ACL) insufficiency. Thirty-five young active patients with an untreated complete tear of the ACL took part in the study. Using a KINCOM isokinetic dynamometer, the dynamic capacity of each muscle group at 30° in concentric and eccentric exertion in both the deficient and sound knee was measured. Findings demonstrated a significant reduction (P<0.05) in the torque produced by the deficient-side quadriceps compared to the sound side but no significant variations in the hamstring torque. Discussion of the findings considers a possible involvement of neurophysiological inhibition of the quadriceps as a cause for the observed weakness.

Original language	English
Pages (from-to)	87-91
Number of pages	5
Journal	Clinical Biomechanics
Volume	4
Issue number	2
DOIs	https://doi.org/10.1016/0268-0033(89)90044-2
State	Published - May 1989

Keywords

Concentric contraction
eccentric contraction
knee
ligament
muscle weakness
rehabilitation

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10.1016/0268-0033(89)90044-2

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title = "Thigh muscle activity and anterior cruciate ligament insufficiency",

abstract = "The purpose of this study was to examine the dynamic relationship between the quadriceps femoris and hamstrings in anterior cruciate ligament (ACL) insufficiency. Thirty-five young active patients with an untreated complete tear of the ACL took part in the study. Using a KINCOM isokinetic dynamometer, the dynamic capacity of each muscle group at 30° in concentric and eccentric exertion in both the deficient and sound knee was measured. Findings demonstrated a significant reduction (P<0.05) in the torque produced by the deficient-side quadriceps compared to the sound side but no significant variations in the hamstring torque. Discussion of the findings considers a possible involvement of neurophysiological inhibition of the quadriceps as a cause for the observed weakness.",

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AU - Dvir, Z.

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N2 - The purpose of this study was to examine the dynamic relationship between the quadriceps femoris and hamstrings in anterior cruciate ligament (ACL) insufficiency. Thirty-five young active patients with an untreated complete tear of the ACL took part in the study. Using a KINCOM isokinetic dynamometer, the dynamic capacity of each muscle group at 30° in concentric and eccentric exertion in both the deficient and sound knee was measured. Findings demonstrated a significant reduction (P<0.05) in the torque produced by the deficient-side quadriceps compared to the sound side but no significant variations in the hamstring torque. Discussion of the findings considers a possible involvement of neurophysiological inhibition of the quadriceps as a cause for the observed weakness.

AB - The purpose of this study was to examine the dynamic relationship between the quadriceps femoris and hamstrings in anterior cruciate ligament (ACL) insufficiency. Thirty-five young active patients with an untreated complete tear of the ACL took part in the study. Using a KINCOM isokinetic dynamometer, the dynamic capacity of each muscle group at 30° in concentric and eccentric exertion in both the deficient and sound knee was measured. Findings demonstrated a significant reduction (P<0.05) in the torque produced by the deficient-side quadriceps compared to the sound side but no significant variations in the hamstring torque. Discussion of the findings considers a possible involvement of neurophysiological inhibition of the quadriceps as a cause for the observed weakness.

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KW - eccentric contraction

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KW - ligament

KW - muscle weakness

KW - rehabilitation

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Thigh muscle activity and anterior cruciate ligament insufficiency

Abstract

Keywords

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