Figure 4: Ultrastructure of contralateral tectopulvinar terminals.

(a-h) Terminals in the pulvinar nucleus (Pcm) labeled by a virus injection in the contralateral SC were identified by a dark reaction product in a subset of their synaptic vesicles. Labeled terminals are indicated by green overlay, black arrows indicate synapses, and postsynaptic dendrites are indicated by blue overlay. Scale bar = 600 nm and applies to all panels.