Journal of Korean Foot and Ankle Society

Table. 3.

Table. 3.

Electromyography, 28-Year-Old Patient

Muscle Nerve ROOT IA SP MUAP INT Comments
PSW FIB Amp Dur Conf
4 weeks after initial trauma
Right tibialis anterior Deep peroneal L45 +++ (300~400) +++ (300~400) 2~4 5~8 N F PSW, fibrillation
Right extensor hallucis longus Deep peroneal L5S1 ++ (100~200) ++ (100~200) - - - Z PSW, fibrillation
Zero MUAP
Right peroneus longus Superficial peroneal L5S1 0 0 2~4 5~8 N F Increased IA
Right extensor digitorum brevis Deep peroneal L5S1 0 0 2~4 5~8 N F Decreased IA
9 months after initial trauma
Right tibialis anterior Deep peroneal L45 + (50~100) + (50~100) 2~4 5~8 N F PSW, fibrillation
Right extensor hallucis longus Deep peroneal L5S1 + (50~100) + (50~100) - - - R PSW, fibrillation
Reduced recruitment
Right peroneus longus Superficial peroneal L5S1 N 0 0 2~4 5~8 N F Normal
Right extensor digitorum brevis Deep peroneal L5S1 N 0 0 2~4 5~8 N F Normal

IA: insertional activity, SP: spontaneous activity, PSW: positive shock wave, FIB: fibrillation, MUAP: motor unit action potential, Amp: amplitude, Dur: duration, Conf: configuration, N: normal, INT: interference, F: full, Z: zero interference, R: reduced interference.

J Korean Foot Ankle Soc 2022;26:136-42 https://doi.org/10.14193/jkfas.2022.26.3.136
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