Cortical myoclonus due to hypocalcemia 12 years after thyroidectomy

Clinical Neurology and Neurosurgery
Yuji UenoYasuyuki Okuma

Abstract

Although seizures have been described in hypocalcemia, myoclonus has been rarely reported. We report the first case of a patient with hypocalcemic cortical myoclonus due to hypoparathyroidism following a previous thyroidectomy. The patient was an 84-year-old woman who presented with multifocal myoclonus, which was predominant in the upper extremities, neck, jaw, and facial muscles. Electrophysiological studies revealed enlarged somatosensory evoked potentials, cortical reflexes evoked by peripheral nerve stimulation, and a cerebral potential preceding myoclonic jerks determined by jerk-locked averaging. All these findings were consistent with cortical myoclonus. The myoclonic state disappeared as serum calcium level became normal. Hypocalcemia should be considered in patients who had had a thyroidectomy, even if it was performed more than 10 years previously.

References

Jun 1, 1992·Journal of the Neurological Sciences·S HashimotoT Suenaga
Mar 1, 1985·Brain : a Journal of Neurology·J A ObesoC D Marsden
May 1, 1983·Annals of Emergency Medicine·R E Cox
Apr 18, 2001·European Neurology·Y OkumaY Mizuno
Sep 1, 1962·Archives of Internal Medicine·B M BLANCHARD
Dec 14, 2004·Movement Disorders : Official Journal of the Movement Disorder Society·Yasuyuki OkumaYoshikuni Mizuno
Apr 1, 1997·Parkinsonism & Related Disorders·Y OkumaY Mizuno

❮ Previous
Next ❯

Related Concepts

Related Feeds

Barrel cortex

Here is the latest research on barrel cortex, a region of somatosensory and motor corticies in the brain, which are used by animals that rely on whiskers for world exploration.

Related Papers

Electroencephalography and Clinical Neurophysiology
G DeuschlC H Lücking
Electroencephalography and Clinical Neurophysiology
S TobimatsuY Kuroiwa
Electroencephalography and Clinical Neurophysiology
R KapoorC J Fowler
© 2022 Meta ULC. All rights reserved