J.Jpn. Surg. Soc.. 56(7): 903-909, 1955

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EXPERIMENTAL STUDIES OF EPILEPTIC SEIZURE ON THE BASIS OF "MARCH OF MOVEMENT"
Ⅰ. SPREADING MODE OF CONVULSIVE MOVEMENT EVOKED BY CORTICAL STIMULATION

Convulsive movements developed following stimulation on the cerebral cortex are classified into four types according to varying modes due to intensity of stimulation.
1. Partial convution : Develops at the contralateral extremity by the minimal supraliminal excitation.
2. Unilateral convulsion : Develops at the contralateral side by a stronger stimulation than (1).
3. Bilateral convulsion : Spreads from the contralateral side of stimulation to the extremities showing a heterophasic movement. This is caused by a stronger stimulation than (2).
4. Homophasic convulsion : Developes following (3) showing a rigid chronic homophasic movement. This is characterized by the prolongation in contracture and relaxing periods. The convulusion in all extremities ceases at the same time.
The extirpation of the cerebral cortex related to the affected extremity causes the present convulsion to cease.
The spread of the cortically induced convulsion seems to increanse or diminish according to the greater or less area and duration of the excitation in the cerebral cortex.
(author's abstract)

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