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Merkel cell-neurite complexes in touch domes of hamster cheek pouch.

Morphological study has been done in touch domes of hamster cheek pouch as a preparation for further electrophysiological study. The touch domes were examined by light and electron microscopy. There were one or two primary ridges (epithelial ridges) in the center of the touch dome, and each dome was supplied by one to three nerve fibres. Tactile cells (Merkel cells) were localized within primary ridges of touch domes and Merkel cell-neurite complexes were observed in every one. Since Merkel cell-neurite complexes are slow adapting mechanoreceptors, these results suggest that they might be involved in touch sensation.