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Neurology 1999;53:644
© 1999 American Academy of Neurology
Brief Communications

Postexercise motor evoked potentials in depressed patients, recovered depressed patients, and controls

P. M. Shajahan, MRCP, MRCPsych, M. F. Glabus, PhD, J. A. Jenkins, PhD and K. P. Ebmeier, MD, MRCPsych

From the MRC Brain Metabolism Unit (Drs. Shajahan, Glabus, Jenkins, and Ebmeier), Royal Edinburgh Hospital; the Department of Psychiatry (Dr. Ebmeier), University of Edinburgh; and the Department of Medical Physics (Dr. Glabus), Royal Infirmary of Edinburgh, Scotland.

Address correspondence and reprint requests to Dr. P.M. Shajahan, MRC Brain Metabolism Unit, Royal Edinburgh Hospital, Morningside Park, Edinburgh EH10 5HF, UK.

We hypothesized that impaired postexercise motor evoked potential (MEP) facilitation in depressed patients would reverse with recovery from depression. Transcranial magnetic stimulation and exercise of the thenar muscles were used to examine the 10 controls, 10 medicated depressed patients, and 10 medicated recovered patients. Depressed patients showed reduced mean postexercise facilitation compared to both controls (p = 0.005) and recovered patients (p = 0.012). Controls and recovered patients had similar mean postexercise MEPs (p = 0.45). This is consistent with other evidence of reversibility of abnormal findings following recovery from depression.




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