olfactory bulb (redirected from Olfactory bulbs)

bulb (bulb) a rounded mass or enlargement.bul´bar

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bulb of aorta  the enlargement of the aorta at its point of origin from the heart.

bulb of corpus spongiosum  b. of penis.

bulb of hair  the bulbous expansion at the proximal end of a hair in which the hair shaft is generated.

olfactory bulb  the bulblike expansion of the olfactory tract on the under surface of the frontal lobe of each cerebral hemisphere; the olfactory nerves enter it.

onion bulb  in neuropathology, a collection of overlapping Schwann cells resembling the bulb of an onion, encircling an axon that has become demyelinated; seen when an axon has repeatedly become demyelinated and remyelinated.

bulb of penis , bulb of urethra the enlarged proximal part of the corpus spongiosum.

bulb of vestibule of vagina , vestibulovaginal bulb a body consisting of paired masses of erectile tissue, one on either side of the vaginal opening.

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olfactory bulb

n.

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

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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.

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olfactory bulb (olfak´trē),

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

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bulb

1. a rounded mass or enlargement.

2. medulla oblongata.

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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

see bulboid corpuscle.

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.

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olfactory

pertaining to the sense of smell.

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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.