olfactory peduncle

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Related to olfactory peduncle: Olfactory tract, olfactory pit

ol·fac·to·ry tract

a nervelike, white band composed primarily of nerve fibers originating from the mitral cells and tufted cells of the olfactory bulb but also containing the scattered cells of the anterior olfactory nucleus. The tract, closely applied to the inferior surface of the frontal lobe, attaches itself to the base of the cerebral hemisphere at the olfactory trigone, beyond which it extends in the form of the olfactory striae that distribute their fibers to the olfactory tubercle and, in largest number, to the olfactory cortex on and around the uncus of the parahippocampal gyrus.
See also: olfactory nerves [CN I].

olfactory peduncle

The long stalk of the olfactory bulb, which contains the olfactory tract.
See also: peduncle


a stemlike connecting part, especially: (1) a collection of nerve fibers coursing between different regions in the central nervous system, or (2) the stalk by which a nonsessile tumor is attached to normal tissue.

cerebellar p's
three pairs of thick, white fiber trunks that arise from the midbrain, pons and medulla and pass into the cerebellum.
cerebral peduncle
the ventral half of the midbrain, divisible into a dorsal part (tegmentum) and a ventral part (crus cerebri), which are separated by the substantia nigra.
peduncle disease
a disease of marine fish caused by the flexibacter Cytophaga psychrophila.
olfactory peduncle
caudal continuation of the olfactory bulb of the brain.
pineal peduncle
see habenula (2).