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NEUROLOGY 1986;36:1061
© 1986 American Academy of Neurology

Discharge pattern of single motor units in basal ganglia disorders

Reinhard Dengler, Werner Wolf, Margot Schubert and Albrecht Struppler

Department of Neurology (Drs. Dengler, Schubert, and Struppler), Technical University, and the Department of Computer Sciences (Dr. Wolf), Bundeswehr University, Munich, FRG.

We studied the discharge pattern of motor units (MUs) from the first dorsal interosseous muscle during slight stationary isometric contraction. In six controls, seven patients with parkinsonism, and five patients with choreic disorders, we analyzed 78 MUs. About one-half of the MUs in both patient groups fired irregularly as shown by interval histograms, joint interval histograms, and corresponding statistical calculations. Cross-correlation techniques revealed a characteristic type of MU synchronization in parkinsonism. Analysis of the MU discharge pattern can be useful in clinical assessment of these disorders.

Address correspondence and reprint requests to Dr. R. Dengler, Neurologische Klinik der Technischen Universität, Möhlstr. 28, 8000 München 80, FRG.

Supported by Deutsche Forschungsgemeinschaft.

Presented in part at the thirty-sixth annual meeting of the American Academy of Neurology, Boston, MA, April 1984.

Accepted for publication December 18, 1985.




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