cranialnerves

cranialnerves - On Old Olympus' Tiny Top A Finn And German...

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On Old Olympus’ Tiny Top A Finn And German Viewed Some Hops Robert C. Dinsdale, M.D.
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On Old Olympus’ Tiny Top A Finn And German Viewed Some Hops I. Nerve modalities carried by the 12 pairs of cranial nerves A. Motor neurons 1. Somatic - innervation of muscles derived from somites (tongue and orbit) 2. Branchial—innervation of mm derived from branchial arches (face, larynx, pharynx) 3. Visceral (autonomic) parasympathetic - innervation smooth/cardiac muscle and glands B. Sensory neurons 1. Somatic - general sensory from skin and mucus membranes (temperature, pressure, etc.) 2. Special - includes smell, taste, sight, hearing and balance 3. Visceral (autonomic) - visceral sensation from parotid gland, carotid sinus/body, middle ear, pharynx, larynx, thorax and abdomen
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On Old Olympus’ Tiny Top A Finn And German Viewed Some Hops II. Associated Sympathetic and Parasympathetic Nerves 1. Ciliary ganglion 2. Pterygopalatine ganglion 3. Otic ganglion 4. Submandibular gangion
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On Old Olympus’ Tiny Top A Finn And German Viewed Some Hops A. Olfactory (CN I) 1. carries special sensory neurons - smell 2. bundles of olfactory nerves pass from nasal mucosa through cribriform plate to olfactory bulb and tract a. collectively referred to as olfactory nerve b. neurons undergo turnover every 60 days 3. head trauma may tear olfactory neurons = loss of smell Most common cause is viral illness/idiopathic
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On Old Olympus’ Tiny Top A Finn And German Viewed Some Hops Optic (CN II) 1. carries special sensory neurons - sight 2. neurons pass from retina through optic canal to optic chiasm
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cranialnerves - On Old Olympus' Tiny Top A Finn And German...

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