The classic view of sensorineural hearing loss (SNHL) is that the "primary" targets are hair cells, and that cochlear-nerve loss is "secondary" to hair cell degeneration. Our recent work in mouse and guinea pig has challenged that view. In noise-induced hearing loss, exposures causing only reversible threshold shifts (and no hair cell loss) nevertheless cause permanent loss of >50% of cochlear-...

OBJECTIVES We investigated the histopathological effects of metamizole sodium (MS) on the sciatic nerve. MATERIALS AND METHODS This study was performed using 48 adult male Wistar albino rats. Ten groups were constituted with 6 rats in each group. MS injection into the sciatic nerve (group 1), MS injection into the muscle [group 3 (50 mg/kg, 0.4 ml) and group 5 (50 mg/kg, 0.8 ml)], MS injectio...

Macrophages have been implicated in peripheral nerve regeneration for some time, supposedly through their involvement in Wallerian degeneration, the process by which the distal nerve degenerates after axotomy and is cleared by phagocytosis. Thus, in several studies in which macrophage accumulation in the distal nerve was reduced and Wallerian degeneration inhibited, regeneration was delayed. Ho...

If a peripheral nerve is cut, that portion of the nerve distal to the point of section undergoes a series of changes characteristic of Wallerian degeneration. Logan, Mannell & Rossiter (1952 a) showed that in the peripheral segment of the sciatic nerve of the cat degenerating after nerve section there is an increase in the concentration of nucleic acid. This change, which is probably related to...

The clinical features and necropsy findings are described in three cases in which severe and rapidly progressive muscle weakness developed in association with carcinoma of the bronchus. In all three cases, muscular weakness was directly responsible for death. Histological and ultramicroscopical examination in all cases showed an unusual type of degeneration of muscle fibres accompanied by degen...

In modern clinical practice, there are often cases of cochleovestibular disorders induced by the use drugs. The term "drug-induced ototoxicity" is directly related to introduction streptomycin in medical practice and means ability drugs or chemicals cause functional degeneration internal ear structures: sensory-epithelial (hair) cells organ Corti, neurons eighth cranial nerve (nervus vestibuloc...

Imaging through the visual system in Alzheimer's disease, with the technology currently in widespread use for the diagnosis and management of eye disease such as glaucoma and macular degeneration, is proving to be promising. In vivo cross-section imaging during an annual comprehensive eye exam has been available for a decade for glaucoma and macular degeneration, and this same imaging, using Op...

how to cite this article: harsh v, chengazhacherril r.b, sharmak, kalakoti p, gupta u, ahmad w, kumar a. sciatic nerve injection palsy in children. iran j child neurol. autumn 2016; 10(4):86-87.   letter to editor  pls see pdf file.   references 1. toopchizadeh v, barzegar m, habibzadeh a. sciatic nerve injection palsy in children, electrophysiologic pattern and outcome: a case series study. ir...

objective: the aim of present study was to evaluate the effects of oral administration of gallic acid (ga) for 21 days alone and in combination with exercise on nerve conduction velocity and sensory and motor functions in rats with sciatic nerve crush. materials and methods: seventy adult male wistar rats (250-300 g) were divided randomly into 7 groups with 10 in each: 1) control (cont), 2) cru...