Reflex inhibition of the quadriceps femoris muscle after injury or reconstruction of the anterior cruciate ligament.

doi:10.2106/00004623-199404000-00010

Paper

Reflex inhibition of the quadriceps femoris muscle after injury or reconstruction of the anterior cruciate ligament.

Published Apr 1, 1994 · L. Snyder-Mackler, P. De Luca, P. R. Williams

The Journal of bone and joint surgery. American volume

309

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9

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Abstract

A burst-superimposition technique was used to assess the strength of the quadriceps femoris muscle in three groups of patients. Group 1 comprised twenty patients who had had a torn anterior cruciate ligament of the knee and had a reconstruction of the ligament one to six months after the injury. Group 2 comprised twelve patients who had had a torn anterior cruciate ligament for an average of three months (a subacute tear). Group 3 comprised eight patients who had had a torn anterior cruciate ligament for an average of two years (a chronic tear). The patients in Groups 2 and 3 had not had an operation for the torn ligament. The patients in Groups 1 and 3 had no evidence of failure of activation of the involved quadriceps, but nine of the twelve patients in Group 2 had reflex inhibition of contraction of the muscle.

Study Snapshot

Key takeawayReflex inhibition of the quadriceps femoris muscle occurs in nine out of twelve patients with subacute or chronic torn anterior cruciate ligaments, but not in those with reconstruction.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Reflex inhibition of the quadriceps femoris muscle after injury or reconstruction of the anterior cruciate ligament.

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