Radicular Myoclonus in a Patient with Guillain-Barré Syndrome

Yasuo Miki; Masahiko Tomiyama; Tatsuya Ueno; Rie Haga; Haruo Nishijima; Akira Arai; Chieko Suzuki; Jin-ichi Nunomura; Masayuki Baba

doi:10.2169/internalmedicine.51.7042

CASE REPORTS

Radicular Myoclonus in a Patient with Guillain-Barré Syndrome

Yasuo Miki, Masahiko Tomiyama, Tatsuya Ueno, Rie Haga, Haruo Nishijima, Akira Arai, Chieko Suzuki, Jin-ichi Nunomura, Masayuki Baba

Author information

Yasuo Miki
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Masahiko Tomiyama
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Tatsuya Ueno
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Rie Haga
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Haruo Nishijima
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Akira Arai
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Chieko Suzuki
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Jin-ichi Nunomura
Department of Neurology, Aomori Prefectural Central Hospital, Japan
Masayuki Baba
Department of Neurology, Aomori Prefectural Central Hospital, Japan

Keywords: Guillain-Barré syndrome, radicular myoclonus, radiculitis, demyelination, ephaptic transmission

JOURNAL OPEN ACCESS

2012 Volume 51 Issue 15 Pages 2021-2023

DOI https://doi.org/10.2169/internalmedicine.51.7042

Details

Abstract

A 53-year-old Japanese woman presented with myoclonus during the course of Guillain-Barré syndrome. The myoclonus was characterized by relatively regular involuntary movements, starting from proximal muscles of the right lower leg, and moving almost simultaneously towards the left lower leg and upper trunk. Surface electromyography revealed rhythmic synchronous discharges with 100-200 ms duration in the agonist and antagonist muscles at approximately 4 Hz. The jerk-locked back averaging, long latency reflexes, and somatosensory evoked potentials studies were normal. We report myoclonus due to radiculitis in a patient with Guillain-Barré syndrome.

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