Olfactory Nerve

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Related to Olfactory Nerve: optic nerve, Cranial nerves

olfactory nerve

[äl′fak·trē ‚nərv]
The first cranial nerve; a paired sensory nerve with its origin in the olfactory lobe and formed by processes of the olfactory cells which lie in the nasal mucosa; greatly reduced in humans.

Olfactory Nerve


the first, paired cranial nerve in vertebrates. The olfactory nerve consists of the axons of the olfactory receptor cells (see). These outgrowths are among the thinnest and slowest-conducting unmyelinated nerve fibers. In mammals, in contrast with other vertebrates, the olfactory nerve does not form a single trunk, but rather, a group of separate bundles. The fibers of the olfactory nerve terminate in the olfactory bulb of the forebrain. Contact between the outgrowths of the neurons of the olfactory bulb and the fibers of the olfactory nerve occurs within the bulb, in specialized synaptic structures called olfactory glomerulae.

References in periodicals archive ?
At 14 days post-hatch, cells were seen in the olfactory nerve in one of 18 procerebrums, but in 30-day post-hatch snails, dividing cells were seen in olfactory and peritentacular nerves in 10 of 19 procerebrums.
Brain-derived neurotrophic factor (BDNF) promotes survival of neurons cultured from the olfactory nerve (Buckland and Cunningham, 1998, 1999; Holcomb et al.
OECs develop from the olfactory placode and subsequently migrate into the olfactory nerve and OB.
The fact that occlusion of the right naris during inhalation for 2 days of the nanosized Mn oxide led to accumulation of Mn only in the left olfactory bulb confirmed that translocation from nasal deposits along the olfactory nerve accounts for this increase.
Scientists removed one of his olfactory bulbs, where the sense of smell resides, and transplanted his own olfactory ensheathing cells (OECs) and olfactory nerve fibroblasts (ONFs) into the damaged area.
Perhaps we eventually resign ourselves to enduring the assault on our olfactory nerve.
He said that when odours stimulate both the trigeminal nerve and the olfactory nerve, the experience becomes much more intense.
Unfortunately, it also resulted in my olfactory nerve being inadvertently severed.
The list includes a neurotoxin from a shellfish that is water soluble, can be aerosolized, and causes death within minutes; a bacterium that can induce hallucinations, itchiness and strange tastes; and an amoebic microbe that crawls up the olfactory nerve to invade the brain, where it kills brain tissue.
The salmon does have a big olfactory nerve resulting in a strong sense of smell - but why should this drive it towards the female angler's fly?
Marked atrophy of the olfactory nerve and glomerular layers of the olfactory bulb was also detectable by 7 days PI along with mild neutrophilic encephalitis.
The olfactory mucous membrane that contains the cells of origin of the olfactory nerve fibers is limited primarily to the region of the superior concha, a corresponding portion of the nasal septum, and the roof of the nasal cavity (the area of the cribriform plate).