Figure 12. Morphology of stimulated neurones was different from that of inhibited neurones.

A, ‘video lucida’ drawings of the first 10 well-visualized stimulated neurones. Note that all stimulated neurones had medium to large sized somata. Most had irregular cell bodies, often with three major poles. In all cases, there were at least three major processes coming off the soma. Subsequent recordings have shown these features to be highly consistent. B, ‘video lucida’ drawings of the first 13 well-visualized inhibited neurones. Note that all inhibited neurones had small to medium sized somata, and all but one had fusiform cell bodies. In most cases there were two major processes, one coming off each pole of the soma. Subsequent recordings have shown these features to also be highly consistent.