Stapedius muscle function tests in the diagnosis of neuromuscular disorders

Muscle weakness and different patterns of fatigability are frequently seen in neuromuscular disorders. The value of a battery of stapedial muscle function tests in the diagnosis and management of these disorders has been evaluated. Each test of stapedial muscle function is described, and case examples of these tests in various neuromuscular disorders including myasthenia gravis and idiopathic facial nerve paralysis are reported.