Sensitive nerve endings9/17/2023 ![]() It can also result from low testosterone levels, another. The anatomy of the fine, varicose 'free' nerve endings of the Rohon-Beard cell neurites is discussed in relation to their function in detecting transient, touch stimuli to the skin and their role in evoking swimming of the embryo. Causes Treatment Outlook A person may experience numbness or tingling in their penis when sitting in a certain position for a long time. This showed that there were enough Rohon-Beard cells to innervate the skin from 1.5 to 2.5 times. Receptive fields (mean area 0.16 mm2) were mapped and related to the total number of Rohon-Beard cells and the area of skin to be innervated. It is important to distinguish between a stimulus and the sensation it elicits. These discharges adapted rapidly and quickly fatigued when stimulated repeatedly. Sensory nerve endings may be classified functionally or morphologically. Impulses were evoked by light touch or stroking of the skin with fine hairs. Responses of Rohon-Beard cells to skin stimulation can be recorded extracellularly using a suction electrode. The neurites are periodically varicose and, between the superficial skin cells, these bulges are invaginated into the skin cell membranes where some terminate. In the electron microscope narrower neurites from this network are found running into the skin between the cells. These Rohon-Beard cells have naked peripheral neurites, usually under 1 μ m in diameter, which form a loose network under the skin. Anatomical studies have shown that the first sensory innervation of the skin in amphibian embryos is by neurones with cell bodies. The skin of the body and tail in embryonic and young larval Xenopus is innervated by sensory neurones with cell bodies lying along the dorsal midline of the spinal cord. ![]()
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