Contraction response to muscle percussion: A reappraisal of the mechanism of this bedside test.
Clin Neurophysiol
; 129(1): 51-58, 2018 01.
Article
em En
| MEDLINE
| ID: mdl-29145167
ABSTRACT
OBJECTIVE:
To study whether the contraction evoked by muscle percussion stems from the excitation of the muscle or of the nerve and to discuss the changes of this response in neuromuscular disorders.METHODS:
In 30 neurologically healthy patients undergoing surgery (for ear, nose, or throat problems unrelated to the study) under general anesthesia with propofol and sufentanil we measured with an electrogoniometer the maximal dorsiflexion of the ankle evoked by reflex hammer percussion of the tibialis anterior muscle before and under neuromuscular junction blockade with rocuronium bromide. In 3 additional healthy volunteers we searched for F-waves to disclose whether percussion excites axons within the muscle.RESULTS:
Responses from 28 neurologically healthy patients (15 women) were analyzed after exclusion of 2 due to technical problems. Mean age (SD) was 28 (9) years. Maximal dorsiflexion of the ankle was not significantly modified by neuromuscular junction blockade (mean difference 0.01â¯mV [95%CI, -0.07 to 0.08], p=0.879). Muscle percussion evoked F-waves in the 3 healthy volunteers tested.CONCLUSIONS:
Maximal contraction response to muscle percussion has a muscular rather than a neural origin. However, percussion also excites axons within the muscle.SIGNIFICANCE:
These findings may provide clues to understand the changes observed in neuromuscular disorders.Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Percussão
/
Músculo Esquelético
/
Testes Imediatos
/
Contração Muscular
/
Miografia
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Clin Neurophysiol
Assunto da revista:
NEUROLOGIA
/
PSICOFISIOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Suíça