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Purpura DP, Pool JL, Ransohoff J, Frumin MJ, Houspian EM. 
“Observations on evoked dendritic potentials of human cortex”. 
EEG Clin. Neurophysiol.. 1957;9:453.
Stimulation of the exposed cortex in 4 patients undergoing brain surgery produced a response identical with the synaptical potential of apical dendrites in the cat. The sensitivity of dendritic synapses to d-tubocurarine injected locally was considerably less in the human subject than in the cat. By contrast, slow infusion of LSD into a cortical artery inhibited dendritic activity in a manner similar to that seen in the cat.
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