. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. I Fig. 3 Clmiiges of the visual evoked response by effect of habituation and attention. Continuous flicker frequency 2/sec. Stroboscope at m. from the retina. Eyes open. Forty superimposed sweeps. O2 and C4, controls, leads of the 10/20 system, common reference in the right mastoid, (i) flashes 1-40, same leads, complex responses are observed on O2 and C4; (2) flashes 1081- 1120, habituation of the response on C4; on O2, no modifications are observed; (3) flashes 1121-1160, the subject counts number of
. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. I Fig. 3 Clmiiges of the visual evoked response by effect of habituation and attention. Continuous flicker frequency 2/sec. Stroboscope at m. from the retina. Eyes open. Forty superimposed sweeps. O2 and C4, controls, leads of the 10/20 system, common reference in the right mastoid, (i) flashes 1-40, same leads, complex responses are observed on O2 and C4; (2) flashes 1081- 1120, habituation of the response on C4; on O2, no modifications are observed; (3) flashes 1121-1160, the subject counts number of flashes, the response increases on C4, on O2 no changes (dishabituation by attention); (4) flashes 1161-2000, without counting flashes, response is again reduced on C4 as in (2), on O2 no changes. Calibrations, 100 msec, 100 microvolts. when the intensity of the flash was increased by bringing the stroboscope near the retina. In some cases with the stroboscope placed at a distance of m. or less from the retina, no changes were observed in the amplitude of the occipital potential even when the flicker stimulation was prolonged RR. 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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