Fig. 23.
B: High power light
micrograph shows a ChAT-positive neuron (from region denoted by asterisk in A) which is approached by a PHA-L labeled fiber bearing
several terminal varicosities, one of which is seen in apposition to the soma
(arrow). The PHA-L injection site was located in the medial preoptic area (case
M 078). C: Low power electron micrograph showing the ChAT-positive cell
body. Boxed area contains the PHA-L varicosity indicated by arrow in (B). Arrowhead denotes the other PHA-L
labeled terminal shown with the same
symbol in (B), which contacts an unlabeled
dendrite. D: High power electron micrograph from boxed region in (C). Symmetric contact
between PHA-L labeled terminal and ChAT-positive cell is denoted by arrowheads.
Scale bar: 1 µm.