olfactory bulb

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bulb

 [bulb]
a rounded mass or enlargement. adj., adj bul´bar.
bulb of aorta the enlargement of the aorta at its point of origin from the heart.
auditory bulb the membranous labyrinth and cochlea.
bulb of eye eyeball.
gustatory b's taste buds.
hair bulb the bulbous expansion at the proximal end of a hair, in which the hair shaft is generated.
inferior bulb of jugular vein a dilatation of the internal jugular vein just before it joins the brachiocephalic vein.
Krause's bulb end-bulb.
olfactory bulb the bulblike expansion of the olfactory tract on the under surface of the frontal lobe of each cerebral hemisphere.
bulb of penis bulb of urethra.
superior bulb of jugular vein a dilatation at the beginning of the internal jugular vein.
taste b's taste buds.
bulb of urethra the enlarged proximal part of the corpus spongiosum.
bulb of vestibule (vestibulovaginal bulb) a body consisting of paired masses of erectile tissue, situated one on either side of the vaginal orifice.

ol·fac·to·ry bulb

[TA]
the grayish expanded rostral extremity of the olfactory tract, lying on the cribriform plate of the ethmoid bone and receiving the olfactory filaments.
Synonym(s): bulbus olfactorius [TA]

olfactory bulb

n.
The bulblike distal end of the olfactory lobe, where the olfactory nerves begin.

olfactory bulb

Etymology: L, olfactus, sense of smell, bulbus, swollen root
the area of the forebrain where the olfactory nerves terminate and the olfactory tracts arise.

olfactory bulb

Either of two paired, rod-shaped structures arising on the vertebral brain at the base of the frontal lobes, which are supported by the cribriform plate of the ethmoid bone. The cribriform plate’s perforations provide conduits for olfactory nerve processes.

ol·fac·to·ry bulb

(ōl-fak'tŏr-ē bŭlb) [TA]
The grayish expanded rostral extremity of the olfactory tract, lying on the cribriform plate of the ethmoid and receiving the olfactory filaments.
Synonym(s): bulbus olfactorius [TA] .

ol·fac·to·ry bulb

(ōl-fak'tŏr-ē bŭlb) [TA]
The grayish expanded rostral extremity of the olfactory tract, lying on the cribriform plate of the ethmoid and receiving the olfactory filaments.
Synonym(s): bulbus olfactorius [TA] .

olfactory bulb (olfak´tərē),

n the area of the forebrain where the olfactory nerves terminate and the olfactory tracts arise.

bulb

1. a rounded mass or enlargement.
2. medulla oblongata.

aortic bulb
the enlargement of the aorta at its point of origin from the heart.
auditory bulb
the membranous labyrinth and cochlea.
eye bulb
the eyeball.
gustatory b's
taste buds.
hair bulb
the bulbous expansion at the proximal end of a hair, in which the hair shaft is generated.
heel bulb
the swollen part of the hoof wall and adjacent soft tissue at the back of the hoof characterized by a periople which is wider than at any other part of the hoof.
Krause's b's
olfactory bulb
see olfactory bulb.
penile bulb
see penile bulb.
taste b's
taste buds.
urethral bulb
the enlarged proximal part of the corpus spongiosum.
vestibular bulb, vestibulovaginal bulb
a body consisting of paired masses of erectile tissue, situated one on either side of the vaginal orifice.

olfactory

pertaining to the sense of smell.

olfactory bulb
the bulblike extremity of the olfactory tract on the rostral surface of the frontal lobe of each cerebral hemisphere; it is lodged against the cribriform plate through which the olfactory nerves pass.
olfactory glands
in the mucosa of the nasal olfactory region; branched tubuloalveolar glands secreting serous fluid; cleanse the mucosal surface, dissolve odor-producing substances.
olfactory hair
modified cilia projecting from olfactory cells in the mucosa of the nasal olfactory area.
olfactory mucosa
specialized olfactory cells in a region of nasal mucosa covering ethmoturbinates, turbinates and nasal septum.
olfactory nerve
the first cranial nerve made up of about 20 bundles and concerned with the sense of smell. The cell bodies are situated in the olfactory mucous membrane of the nose. Nerve fibers lead upward through openings in the cribriform plate of the ethmoid bone and connect with the cells of the olfactory bulb. From there the fibers pass inward to the cerebrum. See also Table 14.
olfactory neuroblastoma
rare neoplasm, commonest in pups and kittens, characterized by local invasion of surrounding bone.
olfactory pit
primordia of the nasal cavities commencing as pits in the olfactory placodes of the embryo. The pits deepen and finally open into the oral cavity as the choanae; the external orifices become the nostrils. Called also nasal pit.
olfactory system
includes the olfactory part of the nasal mucosa, the olfactory nerves and the olfactory bulbs of the cerebrum.
olfactory tract
a band of white nerve fibers visible on the ventral surface of the brain running caudally from the olfactory bulbs.
olfactory tractotomy
surgical removal or transection of the olfactory tracts to produce an anosmia may be performed in cats as a means of controlling spraying and inappropriate urination.
References in periodicals archive ?
Notably, in controls, the midbrain showed significantly higher levels of the mictoglial marker IBA-1 compared with either the cortex or the olfactory bulb (Figure 2F), suggesting that numbers of microglia are higher in the midbrain under normal conditions.
In addition to the dramatically enlarged olfactory bulb, the Hadrocodium brain sported a wrinkly, topmost layer missing in reptiles, the neocortex.
ISOLATION OF OLFACTORY ENSHEATHING CELLS FROM OLFACTORY BULB AND OLFACTORY MUCOSA
13) In general, tumors that involve the olfactory bulb, olfactory tract, or prefrontal lobe can cause olfactory deficits, while temporal lobe tumors are associated with olfactory hallucination.
In modern humans the size of the olfactory bulbs is related to the capacity of detection and discrimination of different smells.
The team has not yet tested whether these mice, the ones with atrophied olfactory bulbs, can still detect pheromones.
Mn also accumulated in the left and right olfactory bulbs when both nares were patent (Figure 3).
Huge olfactory bulbs (part Huge olfactory bulbs for tracking Of brain used for smell) prey.
1983) were employed to determine cadmium residues in the olfactory bulbs, kidneys, and liver.
Although the Pitx1 protein doesn't show up in the developing pelvic region of the fish lacking hind fins, the gene still does its normal job in other regions such as in the thymus and olfactory bulbs.
He and his team have now discovered that Foxj1 was an 'off switch' that told neuronal stem cells to stop reproducing and triggered the development of a stem cell "niche" in the olfactory bulbs.