Abstract: 1. With the electrical stimulation of hippocampus no deterioration wasobserved in the establishment of the conditioned avoidance response with thesmell stimulus as conditioned stimulus (CS) in the rabbits.But there weresignificantly inhibitory effects on the establishment of the conditionedavoidance response with the hearing stimulus as CS. 2. No disorder occurred because of electric destruction of thehippocampus in the establishment and persistence of the conditionedgustatory detestation with the gustatory stimulus as CS in rats.But in theestablishment of the conditioned avoidance response with the visual stimulusas CS the inhibitory effects occurred significantly.But no effectwas observed on the retention of its memory. 3. These results show that the memory of the sense of smell andgustation hardly depends on the action of the hippocampus.But in theformation of the memory of vision and hearing the hippocampus plays animportant role.Probable explanations of the abovementioned phenomena arediscussed here.

Key words: NULL