Abstract:The response evoked in the cerebral cortex of laboratory rats after stimulation of the medullary pyramid is surface-positive. It begins 0.9–1.6 ms after the stimulus, attains peak amplitude (up to 2 mV) in 0.8–1.2 ms and lasts 2–4 ms. It occurs throughout the anterior two-thirds of the dorsal cortex and is largest lateral to bregma, with a secondary maximum in the somatosensory area II. Although it depends on antidromic conduction in pyramidal tract fibers for its production, it varies in amplitude, configurat… Show more
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