Midbrain

Midbrain - Midbrain Somatic motor neurons for eye movement...

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Midbrain: Somatic motor neurons for eye movement Extends from the pons to the lower portion of the diencephalon, uppermost part of the brain stem (2.5 cm) Receipt and integration of sensory and motor impulses Contains superior and inferior colliculi Contains nuclei for two cranial nerves CN III, CN IV (oculomotor nerves) originate from midbrain o Olfactory (I) Arises in olfactory mucosa, passes through cribriform plate of ethmoid bone, through olfactory bulb and olfactory tract, and terminates in primary olgactory areas of cerebral cortex function: smell clinical application: loss of the sense of smell (anosmia) may result from head injuries in which the cribriform plate of the ethmoid bone is fractured and from lesions along the olfactory pathway o Optic (II): Arises in retina of the eye, passes through optic foramen, forms optic chiasma, passes through optic tracts, lateral geniculate nucleus in thalamus, and terminates in visual areas of cerebral cortex
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This note was uploaded on 04/23/2011 for the course BIME 2102 taught by Professor Kim during the Spring '11 term at UVA.

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Midbrain - Midbrain Somatic motor neurons for eye movement...

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