Antidromic Cortical Response to Stimulation of Isolated Pyramidal Tract

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Science  19 Jun 1959:
Vol. 129, Issue 3364, pp. 1676-1678
DOI: 10.1126/science.129.3364.1676


Direct electrical excitation of the intact medullary pyramids evokes a complex cortical response. When the pyramidal tract was dissected away from the bulb and stimulated in isolation. the antidromic cortical response consisted of a simple, positive potential, regardless of the stimulus parameters. This finding necessitates a reinterpretation of previous results obtained by stimulation of the intact pyramids.