CRANIAL NERVE I: OLFACTORY NERVE

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OLFACTORY MUCOSA: There are actually multiple olfactory nerves in the olfactory mucosa of the superior part of the nasal cavity. They pierce the Cribriform Plate of the Ethmoid Bone and lead to OLFACTORY TRACTS on the other side.

SKULL FRACTURES: Can shear olfactory nerves at the cribriform plate, impairing sense of smell. The damage can be unilateral.

TESTING THE NERVE: Wave peppermint under the nostril, testing each nostril separately.

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