Neuromuscular efficiency of the vastus lateralis and biceps femoris muscles in individuals with anterior cruciate ligament injuries
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Data
2015
Autores
Aragão, Fernando Amâncio
Schäfer, Gabriel Santo
Albuquerque, Carlos Eduardo de
Vituri, Rogério Fonseca
Azevedo, Fábio Mícolis de [UNESP]
Bertolini, Gladson Ricardo Flor
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Resumo
To analyze strength and integrated electromyography (IEMG) data in order to determine the neuromuscular efficiency (NME) of the vastus lateralis (VL) and biceps femoris (BF) muscles in patients with anterior cruciate ligament (ACL) injuries, during the preoperative and postoperative periods; and to compare the injured limb at these two times, using the non-operated limb as a control. EMG data and BF and VL strength data were collected during three maximum isometric contractions in knee flexion and extension movements. The assessment protocol was applied before the operation and two months after the operation, and the NME of the BF and VL muscles was obtained. There was no difference in the NME of the VL muscle from before to after the operation. On the other hand, the NME of the BF in the non-operated limb was found to have increased, two months after the surgery. The NME provides a good estimate of muscle function because it is directly related to muscle strength and capacity for activation. However, the results indicated that two months after the ACL reconstruction procedure, at the time when loading in the open kinetic chain within rehabilitation protocols is usually started, the neuromuscular efficiency of the VL and BF had still not been reestablished.
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Palavras-chave
Anterior cruciate ligament, Biomechanics, Muscle fatigue
Como citar
Revista Brasileira De Ortopedia, v. 50, n. 2, p. 180-185, 2015.