Neuromuscular responses in individuals with anterior cruciate ligament repair

Sangeetha MADHAVAN; Richard K SHIELDS

doi:10.1016/j.clinph.2010.09.002

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Neuromuscular responses in individuals with anterior cruciate ligament repair

Journal article

Open access

Peer reviewed

Neuromuscular responses in individuals with anterior cruciate ligament repair

Sangeetha MADHAVAN and Richard K SHIELDS

Clinical neurophysiology, Vol.122(5), pp.997-1004

2011

DOI: 10.1016/j.clinph.2010.09.002

PMCID: PMC3018702

PMID: 20884289

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https://doi.org/10.1016/j.clinph.2010.09.002View

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Abstract

Objective: Knee surgery may alter the neuromuscular response to unexpected perturbations during functional, dynamic tasks. Long latency reflexes (LLR) follow a transcortical pathway and appear to be modifiable by task demands, potentially giving them a role in neuromuscular performance. We examined LLRs of the quadriceps and hamstrings in response to unexpected perturbations in individuals with a repaired anterior cruciate ligament (ACLR) during a weight-bearing task. We also investigated the anticipatory and volitional muscle activity that preceded and followed the LLR to quantify possible reflex adaptations associated with surgical repair. Methods: Twelve females with ACLR and 12 healthy female controls performed a single leg squat maneuver, tracking a sinusoidal target. Random perturbations at the start of the flexion phase yielded tracking errors ("overshoot errors") and triggered compensatory reflex activity. Results: ACLR subjects demonstrated greater overshoot error and knee velocity during unexpected perturbations, increased LLR responses, and reduced absolute anticipatory, short-latency reflex, and voluntary quadriceps activity. Conclusions: ACLR subjects showed impaired response to perturbation and a distinct EMG profile during a dynamic single leg weight-bearing task. Future research will determine the cause of neural adaptations in those with ACLR. Significance: Neuromuscular adaptations may be a viable target for post-ACL injury rehabilitation interventions.

Nervous System

Neurosurgery

Electrodiagnosis. Electric activity recording

Investigative techniques, diagnostic techniques (general aspects)

Skull, brain, vascular surgery

Biological and medical sciences

Medical sciences

Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases

Details

Title: Subtitle: Neuromuscular responses in individuals with anterior cruciate ligament repair
Creators: Sangeetha MADHAVAN - Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, IA, United States
Richard K SHIELDS - Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, IA, United States
Resource Type: Journal article
Publication Details: Clinical neurophysiology, Vol.122(5), pp.997-1004
DOI: 10.1016/j.clinph.2010.09.002
PMID: 20884289
PMCID: PMC3018702
NLM abbreviation: Clin Neurophysiol
ISSN: 1388-2457
eISSN: 1872-8952
Publisher: Elsevier; Oxford
Language: English
Date published: 2011
Academic Unit: Orthopedics and Rehabilitation; Physical Therapy and Rehabilitation Science
Record Identifier: 9984047718902771

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