Choose 3 cranial nerves. Tell me if they are sensory, motor or
mixed, their number, their...
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Choose 3 cranial nerves. Tell me if they are sensory, motor ormixed, their number, their location, and their function in detail.Tell me why you chose the 3 cranial nerves you did and why youthink they are unique or important or interesting to you. Typeone-one 1/2 pages-double spaced.
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Olfactory nerve Olfactory nerve is the 1st cranial nerve It is purely sensory and carries the sense of smell from nasal cavity Unique Features 1 The primary sensory neurons of olfactory nerve lie on the body surface in the epithelial lining of the nasal cavity and their dendrites lie free in the mucous film 2 The primary sensory neurons of olfactory nerve olfactory neurons undergo continuous turnover ie they are continuously replaced by stem cells in the olfactory neuroepithelium Functional Components Special somatic afferent fibres They carry special sensations of smell from the olfactory region of the nasal cavity and terminate in the olfactory bulb Course Relations and Distribution Each olfactory nerve consists of about 20 minute bundles of nonmyelinated nerve fibres They arise from primary receptor neurons modified bipolar neurons of the olfactory epithelium of nasal cavity pass through foramina in the cribriform plate of the ethmoid to enter the anterior cranial fossa where they terminate in the olfactory bulb In the olfactory bulb they synapse with the mitral cells The bundles of olfactory nerves are surrounded by three meninges
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