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Electromyographic Analysis with Reference to the Role of the Globus Pallidus.

H. SHIMAZU, M.D.; T. HONGO, M.D.; K. KUBOTA, M.D.; H. NARABAYASHI, M.D.

Arch Neurol. 1962;6(1):10-17.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

The terms rigidity and spasticity are considered to denote different states in clinical neurology. Liddell and Sherrington⁹ pointed out that the stretch reflex in decerebrate cats consisted of 2 phases, one being the "phasic" component, which appeared only during the period of increasing muscle stretch, and the other the "tonic" or "postural" component, which existed during the continuously sustained stretch. In previous papers, we^11,12 have reported that these 2 components can be demonstrated in the so-called hypertonic states of "extrapyramidal" disease and that the tonic component is more markedly and selectively decreased by stereotaxic pallidotomy than the phasic one. This paper is an investigation of the neurophysiological mechanisms which underlie these 2 patterns of stretch reflex, with particular reference to their relationship to the globus pallidus.

The concept of a gamma loop, proposed by Granit,³ introduced a plausible physiological explanation of the rigid and spastic states. The . . . [Full Text PDF of this Article]

Author Affiliations
TOKYO

Department of Physiology, Juntendo Medical School (Dr. Shimazu); Department of Neurophysiology, Brain Research Institute, Tokyo University (Dr. Hongo and Dr. Kubota), and Section of Neurology, Juntendo Medical School.

Footnotes
Received for publication Aug. 14, 1961.

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