. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. B. TRIAL 4 - RUN 18 . DORSAL HIPP LEADS (REGION GA2). 0-5 ENTORHINAL AREA LEADS - 20 MSEC *• ;A., 05 SEC -0-5- FiG. 5 Cross-correlation functions in early training, prepared with an iBM-709 electronic computer. Here, records from hippocampal zones CA., and CA, consistently lead those from the entor- hinal area by 20-35 nisec, thus resembling the effects of septal stimulation in acute experiments (see text). irregularity in frequency ot the hippocampal slow waves, with some strong periodic activit
. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. B. TRIAL 4 - RUN 18 . DORSAL HIPP LEADS (REGION GA2). 0-5 ENTORHINAL AREA LEADS - 20 MSEC *• ;A., 05 SEC -0-5- FiG. 5 Cross-correlation functions in early training, prepared with an iBM-709 electronic computer. Here, records from hippocampal zones CA., and CA, consistently lead those from the entor- hinal area by 20-35 nisec, thus resembling the effects of septal stimulation in acute experiments (see text). irregularity in frequency ot the hippocampal slow waves, with some strong periodic activity at 3-4 cycles/sec. In cross-correlations, phase angles of this slower 'resting' activity showed considerable variation, but were most consistently those in which the dorsal hippocampus led the entorhinal area. Examination ot this 'resting' 3-4 cycles/sec. activity in the trained animal thus showed a strong resemblance to the phase relations of the faster 5-6 cycles/sec. bursts in the approach performance of the untrained animal. It is of some interest that these phase angles can be apparently sharply reversed in relation to the performance of a trained. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Council for International Organizations of Medical Sciences; Fessard, A. (Alfred); Delafresnaye, J. F. (Jean Francisque), 1919-. Springfield, Ill. , Thomas
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