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Ankle perturbation generates bilateral alteration of knee muscle onset times after unilateral anterior cruciate ligament reconstruction
Ankle perturbation generates bilateral alteration of knee muscle onset times after unilateral anterior cruciate ligament reconstruction
- Source :
- PeerJ, PeerJ, Vol 6, p e5310 (2018)
- Publication Year :
- 2018
-
Abstract
- Background The aim of this study was to compare muscle activation onset times of knee muscles between the involved and uninvolved knee of patients with unilateral anterior cruciate ligament reconstruction (ACLR), and the uninjured knees of healthy subjects after a controlled perturbation at the ankle level. Methods Fifty male amateur soccer players, 25 with unilateral ACLR using semitendinosus-gracilis graft (age = 28.36 ± 7.87 years; time after surgery = 9 ± 3 months) and 25 uninjured control subjects (age = 24.16 ± 2.67 years) participated in the study. Two destabilizing platforms (one for each limb) generated a controlled perturbation at the ankle of each participant (30°of inversion, 10°plantarflexion simultaneously) in a weight bearing condition. The muscle activation onset times of semitendinosus (ST) and vastus medialis (VM) was detected through an electromyographic (EMG) analysis to assess the neuromuscular function of knee muscles. Results Subjects with ACLR had significant delays in EMG onset in the involved (VM = 99.9 ± 30 ms; ST = 101.7 ± 28 ms) and uninvolved knee (VM = 100.4 ± 26 ms; ST = 104.7 ± 28 ms) when compared with the healthy subjects (VM = 69.1 ± 9 ms; ST = 74.6 ± 9 ms). However, no difference was found between involved and uninvolved knee of the ACLR group. Discussion The results show a bilateral alteration of knee muscles in EMG onset after a unilateral ACLR, responses that can be elicited with an ankle perturbation. This suggests an alteration in the central processing of proprioceptive information and/or central nervous system re-organization that may affect neuromuscular control of knee muscles in the involved and uninvolved lower limbs.
- Subjects :
- Anterior cruciate ligament reconstruction
Vastus medialis
medicine.medical_treatment
lcsh:Medicine
medicine.disease_cause
General Biochemistry, Genetics and Molecular Biology
Weight-bearing
03 medical and health sciences
0302 clinical medicine
Neuromuscular control
medicine
Surface electromyography
Proprioception
business.industry
General Neuroscience
lcsh:R
Healthy subjects
030229 sport sciences
General Medicine
Control subjects
musculoskeletal system
Kinesiology
medicine.anatomical_structure
Orthopedics
Anesthesia
Ankle
General Agricultural and Biological Sciences
business
human activities
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 21678359
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- PeerJ
- Accession number :
- edsair.doi.dedup.....8a6e43886ddd3cc745ef4082916797dd