olfactory nerve
Acronym:
1n
The term olfactory nerve (1n) refers to the very short first cranial nerve. Defined topologically and histologically, it consists of unmyelinated axons that project from sensory receptor cells in the olfactory epithelium (OLE) high in the nasal cavity. Multiple tiny bundles of axons penetrate the cribriform plate, the thin boney roof of the nasal cavity. In the human ( Buck-2013 ) and macaque ( Price-2004 ), they enter the ventral side of the main olfactory bulb (MOB). In the mouse ( Hof-2000 Franklin-2008 ), they envelop the MOB and enter the ventral, medial and lateral sides. In the rat ( Swanson-2004 Paxinos-2009b ), 1n and the olfactory tract (oltr) are considered a single structure, the alternate olfactory tract.
Functionally, 1n is the primary receptor element of the olfactory system (OSY). For more on its function, see main olfactory bulb (MOB). Final 26 Dec 2024.
Also known as: first cranial nerve, Nerve I, olfactory fila, Fila olfactoriaNeuroNames ID : 32
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