Figure 11

Anterogradely labeled single spinal afferent axons that arborized extensively in the antrum circular muscle. (a) Contour of a representative antrum and the location of a single spinal axon within the antrum. (a’) Neurolucida tracing of this axon. (b, c) Partial projection photomicrographs of red boxes in (a’). Similar to the fundus (Fig. 9) and corpus (Fig. 10), this axon contained multiple varicose branches that projected either circumferentially or longitudinally to the circular muscles (unstained, imaged with DIC). PA = parent axon. Scale bar in (a) = 3 mm, in (a’) = 500 μm, and in (c) = 20 μm (also applies to b).