Figure 5.

Morphology and localization of NTS neurons responsive to MTII and/or αMSH. A, Micrograph (top) and computer-aided reconstruction (bottom) of a representative NTS neuron with bipolar soma shape. B, Micrograph (top) and computer-aided reconstruction (bottom) of a representative NTS neuron with multipolar soma shape. C, Schematic diagram depicting the localization of NTS neurons according to their soma shape (square, bipolar; circle, multipolar) and their response to perfusion with either MTII or αMSH (gray symbol, inhibited; black symbol, excited; white symbol, nonresponsive). For the purpose of intelligibility, all the responsive neurons are depicted on the right side of the scheme, whereas the nonresponsive neurons are depicted on the left side of the scheme. TS, Tractus solitarius; DMV, dorsal motor nucleus of the vagus; AP, area postrema; IV, fourth ventricle.