Recently, in vivo confocal microscopy is used to examine the human corneal nerve fibers morphology. Corneal nerve fiber architecture and its role are studied in healthy and pathological conditions. Corneal nerves of rats were studied by nonspecific acetylcholinesterase (NsAchE) staining. NsAchE-positive subepithelial (stromal) nerve fiber has been found to be insensitive to capsaicin. Besides, ...

AIMS/INTRODUCTION To evaluate the morphological changes of the median and posterior tibial nerve using high-resolution ultrasonography, and the corneal C fiber pathology by corneal confocal microscopy in type 2 diabetic patients. MATERIALS AND METHODS The cross-sectional area, hypoechoic area and maximum thickness of the nerve fascicle of both nerves were measured by high-resolution ultrasono...

Cryolipolysis is a noninvasive, skin cooling treatment for local fat reduction that causes prolonged hypoesthesia over the treated area. We tested the hypothesis that cryolipolysis can attenuate nociception of a range of sensory stimuli, including stimuli that evoke itch. The effects of cryolipolysis on sensory phenomena were evaluated by quantitative sensory testing (QST) in 11 healthy subject...

Small-fiber sensory neuropathy with neuropathic pain had been a diagnostic challenge for neurologists. We and several groups have developed skin biopsy with quantitation of intraepidermal nerve fiber (IENF) density as a diagnostic approach. In the skin with small-fiber sensory neuropathy, there are pathological hallmarks: reduced IENF density with degeneration of subepidermal nerve plexuses and...

PURPOSE To validate corneal sub-basal nerve plexus examination by in vivo corneal confocal microscopy. METHODS Five parameters of corneal sub-basal nerve plexus in 250 human eyes (nerve fiber length, number of fibers, number of beadings, branching pattern, fiber tortuosity) acquired using in vivo corneal confocal microscopy (Confoscan 4.0; NIDEK Co Ltd) were analyzed. The first operator repea...

This video demonstrates in detail an in vitro single-fiber electrophysiological recording protocol using a mouse colorectum-nerve preparation. The approach allows unbiased identification and functional characterization of individual colorectal afferents. Extracellular recordings of propagated action potentials (APs) that originate from one or a few afferent (i.e., single-fiber) receptive fields...

It has been known that the spinal ganglion cell of vertebrates, which developed more highly than the shirk, has a monopolar configuration and that its axon ramifies into two branches, i.e., to the dorsal root fiber and to the peripheral nerve fiber, forming a Y-shaped bifurcation (Lenhossek, 1886). An afferent impulse from the peripheral nerve, therefore, conducts through this bifurcation to th...

That terminals of uninjured primary sensory neurons terminating in the dorsal horn of the spinal cord can collaterally sprout was first suggested by Liu and Chambers (1958), but this has since been disputed. Recently, horseradish peroxidase conjugated to the B subunit of cholera toxin (B-HRP) and intracellular HRP injections have shown that sciatic nerve section or crush produces a long-lasting...

BACKGROUND Accumulating experimental and clinical evidence supports the hypothesis that complex regional pain syndrome type I (CRPS-I) may be a small fiber neuropathy. OBJECTIVES To evaluate the use of commercially available standard biopsy methods to detect intradermal axon pathology in CRPS-I, and to ascertain if these structural changes can explain quantitative sensory testing (QST) findin...

OBJECTIVE To assess small and large nerve fiber function in people with normal glucose tolerance (NGT), impaired glucose tolerance (IGT), and type 2 diabetes (T2D). RESEARCH DESIGN AND METHODS Participants were recruited consecutively from a population-based cohort: NGT (n = 39), IGT (n = 29), and T2D (n = 51). Electrophysiological measures included nerve conduction studies and thermal thresh...