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Bimodality electrophysiologic evaluation of brainstem in sleep apnea syndrome

Wayne State University School of Medicine (Drs. Verma and Kapen), Detroit; the EEG and Evoked Potentials Laboratory (Dr. Verma and Ms. King), and the Sleep-Wake Disorder Unit (Dr. Kapen and Mr. Koshorek), Veterans Administration Medical Center, Allen Park, MI.

Previous electrophysiologic studies in the sleep apnea syndrome (SAS) have used only a single modality (brainstem auditory evoked responses [BAERs]) and yielded conflicting, inconsistent, and inconclusive results. We utilized both BAERs and somatosensory evoked responses in 12 patients with SAS and found normal central conduction times in all patients. These data argue against a significant structural alteration in both rostral and caudal brainstem, insofar as the auditory and somatosensory pathways are concerned, in patients with SAS.

Address correspondence and reprint requests to Dr. Verma, VAMC-127, Allen Park, MI 48101.

Presented in part at the thirty-eighth annual meeting of the American Academy of Neurology, New Orleans, LA, April 1986.

Supported by the Veterans Administration.

Received August 4, 1986. Accepted for publication in final form September 25, 1986.