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PubMed1987

Substance P immunoreactive nerve fibers of the canine laryngeal mucosa.

Substance P (SP) immunoreactive nerve endings in the laryngeal mucosa were studied by PAP immunohistochemistry with light and electron microscopy. SP immunoreactive sensory endings were observed in the epithelium as intra-epithelial free nerve endings and taste bud-like structures. A small number of autonomic SP immunoreactive nerve fibers were observed running parallel to arterioles which were over 30 micron in diameter and terminated in glandular cells. Contrary to findings by silver impregnation, intraepithelial free nerve endings were more frequently observed on the lower surface of the vocal cord. The taste bud-like structures were classified into two different types: simple terminations and reticular terminations, according to the mode of the SP immunoreactive nerve fiber. Immature or degenerated taste bud-like structures in the larynx were assumed to be mechanical receptors because these receptors lacked outer taste pores and taste hairs.

Animals↗
PubMed1964

RHYTHMICAL VARIATIONS ACCOMPANYING GUSTATORY STIMULATION OBSERVED BY MEANS OF LOCALIZATION PHENOMENA.

When two taste stimuli are presented, one to each side of the tongue, with a time delay of up to 1 msec., the taste sensation seems to move across the tongue. This phenomenon which is similar to directional hearing, can be used to show periodic fluctuations in sensation magnitude as well as other aspects of sensation. When the apparatus was refined to present taste stimuli, it was possible to observe rhythmic changes in the perception of taste. An analogy is demonstrated between hearing and taste sensation, even to some quantitative values.

Electric Stimulation↗