Synapses in the lateral geniculate nucleus of the primate

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Abstract
Axosomatic synapses were not infrequently found upon perikarya of neurons of the lateral geniculate nucleus of the monkey despite recent allusions to their rarity. Admittedly they were not observed as readily as those seen upon dendrites. Accurate estimates of relative numbers are difficult to make because sampling errors may bias results. Thus, only systematically made large-scale counts could provide reasonably accurate ratios. One synaptic knob can have 2, perhaps more, synapses with a single soma, and such a knob can synapse with both a soma and a neighboring dendrite. Thus, in this situation there is no reason to suspect a need for 2 morphological kinds of terminal, one related to somata and another to dendrites. The present study supports flexibility and overlap in the terminal organization of the synaptic substrate as opposed to immutability of connections with single axons focusing their entire synaptic output upon relatively few somata.

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