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First cranial nerve

First cranial nerve --> olfactory nerves

Collective term denoting the numerous olfactory filaments: slender fascicles each composed of the thin, unmyelinated axons of 8 to 12 of the bipolar olfactory receptor cells in the olfactory portion of the nasal mucosa; the olfactory filaments pass through the cribriform plate of the ethmoid bone and enter the olfactory bulb, where they terminate in synaptic contact with mitral cells, tufted cells, and granule cells.

See: olfactory tract.

Synonym: nervi olfactorii, fila olfactoria, first cranial nerve, nerve of smell, olfactory fila.


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