FACTORS CONTROLLING BRAIN POTENTIALS IN THE CAT

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Abstract
The normal spontaneous rhythms of the cat''s geniculate body, especially the dominant one at 3 per sec, are independent of impulses reaching these neurones from optic nerves, cortex or brain stem. The background level of excitation, detd. largely by optic impulses, however, strongly influences their character. The slow rhythm fades out over hrs. in the dark and is reinitiated after brief illumination. The enhanced spontaneous and evoked optic potentials induced by K, citrate, acid, strychnine, insulin and polarizing currents, and the diminished potentials resulting from Ca, alkali and glucose are described and interpreted.

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