Neurosecretory endings and target cells in the synaptic cleft of the human vocal cord: an electron microscopic study.

The action of neurotransmitters is of interest in the normal function of the vocal cord since they regulate mucous secretion and vessel caliber. The intersynaptic space between glandular and myoepithelial cells and the corresponding neuroendocrine endings is the area in which these substances are delivered. This area has not been previously studied in the human vocal cord. Specimens from vocal cords have been studied by electron microscopy. In our study, it seems to be clear that there exists a very close contact between myoepithelial cells and secretory nerve endings. This close relationship is likewise observed between these cells and glandular cells.