Fig. 4.

MCP-IR in different areas of the brainstem.A, Coronal section through the lateral vestibular nucleus. B, The same field as in A, shown at a higher magnification. Note the intense MCP-IR displayed by these large neurons in both the nucleus and cytoplasm and, occasionally, in the neuronal processes. C, MCP-IR in the motor nucleus of the 12th cranial nerve and in some neurons of the medial nucleus of the solitary tract. D, Neurons of the gigantocellular reticular formation. The cellular contours are clearly depicted because of the dense MCP-IR in the cytoplasm. The neurons, most of which appear out of focus at the lower portion of the micrograph, correspond to the dorsal nucleus of the inferior olive. E, Coronal section through the corpus callosum. Note the abundant MCP-IR of the cells in the white matter that mostly correspond to glial cells. Scale bar (shown in D): 120 μm.