[Non-synaptic integration of neuronal cell bodies in the snail central nervous system].

Approach to regions occupied by perikarya of the snail 5-HT-ergic neurons produced excitation. The strongest action was recorded on the PedA cluster surface, and it was further enhanced by adding the 5-HT precursor. The findings suggest that the mechanisms underlying 5-HT-dependent behaviour include a mutual excitatory co-operation between somata of neighbouring 5-HT-ergic neurons.