Unmedullated nerve fibers physiologically carrying signals in the afferent direction became of interest as a group apart, when it was learned that those in the skin nerves, having their origin in cells of the dorsal root ganglia (d.r.C), possess properties different from those with cells of origin in the sympathetic ganglia (s.C). I t has long been known that the fibers of the olfactory nerve a...

Multiple-bud regeneration, i.e., multiple amplification, has been shown to exist in peripheral nerve regeneration. Multiple buds grow towards the distal nerve stump during proximal nerve fiber regeneration. Our previous studies have verified the limit and validity of multiple amplification of peripheral nerve regeneration using small gap sleeve bridging of small donor nerves to repair large rec...

By examining rapid changes in the volume and temperature during excitation of a large number of excitable cells and tissues, we have shown that the excitation process is invariably accompanied by swelling and heat production in the superficial protoplasmic layer. By comparing the behavior of a model system (synthetic anionic gels containing both Caand Naions) with that of nerve fibers under com...

This is a study of the characteristics of the splanchnic nerve supply to the mesenteric vascular circuit. The flow and pressure responses in the dog's superior mesenteric artery to splanchnic nerve stimulation and to intraarterial injections of epinephrine and norepinephrine, before and during various levels of adrenergic blockade, are analyzed. The results suggest that the splanchnic nerve con...

Appreciation of the form of the retinal image depends upon a correspondence between the distribution of light on the retina and the distribution of activity among the fibers of the optic nerve. This correspondence may be studied directly by recording the activity in single optic nerve fibers in response to illuminating various parts of the retina. A given optic nerve fiber responds to light onl...

Response adaptation is a general characteristic of neurons. A number of studies have investigated the adaptation characteristics of auditory-nerve fibers, which send information to the brain about sound stimuli. However, there have been no previous adaptation studies of olivocochlear neurons, which provide efferent fibers to hair cells and auditory nerve dendrites in the auditory periphery. To ...

Anatomy of vagus nerve: The vagus nerve arises from three nuclei located in the medulla of brain. They are (DAT) 1. Nucleus ambiguous (Motor) 2. Nucleus dorsalis 3. Nucleus of tractus solitaries Nucleus ambiguus: Is the motor nucleus of the vagus nerve (upper part give fibres to 9 nerve and lower to 10 th ). The efferent fibers of the dorsal nucleus innervates the involuntary muscles of bronchi...

Using immunocytochemistry, the authors studied the peptidergic innervation to the vasculature of the optic nerve and retina in the rhesus monkey and rat. In the monkey, beaded nerve fibers immunoreactive to the vasoactive peptides, calcitonin gene-related peptide (CGRP), neuropeptide Y (NPY), substance P (SP), and vasoactive intestinal peptide (VIP), are present in the adventitia and perivascul...

Introduction Small fiber involvement in different patterns of peripheral neuropathy has stirred much interest during the past few years due to the role played by these fibers in pain perception and the availability of new techniques of skin biopsy that permit the study of nerve endings [1]. The use of protein gene product 9.5 (PGP 9.5) as a panaxonal marker in skin biopsies has led to identific...