Stapedius reflexometry. A diagnostic test of myasthenia gravis

G. K. Ahuja, A. Verma, P. Ghosh, M. N. Nagaraj

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Contraction of the stapedius muscle can be measured by electroacoustic impedance bridge. Muscle weakness and easy fatiguability which are cardinal features of myasthenia gravis (MG) are manifested by increased threshold and early decay of the stapedius reflex. This can be used as an objective test in the diagnosis of myasthenia gravis. Stapedius reflex was measured using Madsen Zo72 electroacoustic impedance bridge in 10 patients with myasthenia gravis and in an equal number of controls. The test was done before and 30 min after intramuscular injection of neostigmin. All patients with myasthenia gravis showed an elevated reflex threshold and 5 patients showed reflex decay. These findings reverted to normal after neostigmin injection. Stapedius reflexometry is a simple objective test for the diagnosis of myasthenia gravis.

Original languageEnglish (US)
Pages (from-to)311-314
Number of pages4
JournalJournal of the Neurological Sciences
Volume46
Issue number3
DOIs
StatePublished - Jun 1980
Externally publishedYes

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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