| 摘 要： | Visual responses of 148 units have been recorded with micropipettes from the left nucleusisthmus areas of toads (Bufo bufo gargarizans), their auditory and tactile responses also exa-mined, and 122 recording sites marked with cobalt sulphide. This study indicates that: (i) 118units responding solely to visual stimuli are found within the nucleus, and 4 multisensory unitsoutside, (ii) there exist a visual field map and binocular units in the nucleus, and (iii) res-ponse latencies of the isthmic units to a spot of light range from 120 to 540 msee, with nocorrelation with recording sites.
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