Olfactory Nerve


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Related to Olfactory Nerve: optic nerve, Cranial nerves

olfactory nerve

[äl′fak·trē ‚nərv]
(neuroscience)
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 ?
Combination of olfactory nerve deficit and pupillary hypersensitivity response generated good values of specificity/Sp 91%, positive predictive value/PPV 87%, and negative predictive value/NPV 75% when differentiating aMCI from those with normal cognition.
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.
Keywords: Olfactory; Behavior; Olfactory nerve transection; Ninjin-yoei-to; Traditional medicine; Regeneration
Within the olfactory nerve, the OECs form cellular channels or tunnels through which large numbers of small-caliber nonmyelinated axons distribute through the olfactory nerve into the outer nerve layer (ONL) of the OB and extend into the olfactory glomeruli, where they make synapses (Figure 1) [19].
The issue of whether or not the solubilization of ultrafine Mn oxide was a prerequisite for its translocation along the olfactory nerve was still outstanding after the experiments described above.
The first arises from damage to the olfactory nerve cells, or neurons.
If one taste nerve is damaged, there are still two left, where-as damage to the olfactory nerve wipes out the sense of smell, explains Duffy.
The nerve endings collect together in a small bundle called the olfactory nerve that passes through the base of the skull into the brain.
When it collects an odor molecule that "fits," the olfactory nerve sends a signal to the brain.
* prevention of the access of infectious agents and toxins to the brain through the olfactory nerve