olfactory tract


Also found in: Dictionary, Thesaurus, Financial, Encyclopedia, Wikipedia.
Related to olfactory tract: olfactory nerve, olfactory bulb

ol·fac·to·ry tract

[TA]
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 tract

A white ribbon-like band along the bottom (orbital) surface of each frontal lobe, composed of axons from the mitral cells in olfactory bulb. These axons terminate in the piriform cortex (the primary olfactory cortex) at the base of the cerebral hemisphere.
See also: tract
References in periodicals archive ?
Next, we compared the number of proliferating cells expressing the marker MCM2 in the glomerular layer, granular cell layer, and olfactory tract of control, as well as AD, PDD/DLB, or FTLD cases.
Here, half of the AD cases presented a higher number of proliferating microglia in the glomerular layer, granular cell layer, and olfactory tract however without reaching significant difference compared to controls.
Expression of PSA-NCAM in the Glomerular Layer, Granular Cell Layer, and Olfactory Tract. We further determined the expression of markers for immature or developing neurons in neurogenic regions such as the glomerular and the granular cell layer of the OB of the different cohorts and therefore analyzed the distribution of cells expressing PSA-NCAM.
We detected an increased number and soma diameter of Iba1+ microglia both in the neurogenic regions of the OB, the glomerular and the granular cell layer, and in the nonneurogenic olfactory tract in all three proteinopathies.
We further observed accumulation of a-Syn in the glomerular layer, granular cell layer, and olfactory tract of PDD/DLB cases, known to be present early in the disease course [10] and described in the anterior olfactory nucleus as well as the peripheral layers of the OB [12, 40].
Effects of olfactory tract lesions on sexual and feeding behavior in the goldfish.