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Pathologies of the Central Nervous System (CNS)

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Olfactory Nerve lesions

An olfactory lesion is a pathological process negatively affecting the function of the first cranial nerve. Recently temporary anosmia Olfactory lesions can be sub-divided into the following categories: a) anosmia: inability to appreciate qualitative olfactory sensations, b) partial anosmia: the ability to appreciate some but not all odorants, c) microsmia or hyposmia: reduced sensitivity to odorants d) […]

Optic nerve lesions

A pathological process involving the optic nerve. Causes: Pathological processes affecting the visual field. Depending on the site of the lesion, a pathological process affecting the second cranial nerve can have various presentations: Monocular blindness: Lesions of one eye or optic nerve such as in multiple sclerosis or giant cell arteritis. Bilateral blindness: Methyl […]

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