tract

1. Anatomy a system of organs, glands, or other tissues that has a particular function

2. a bundle of nerve fibres having the same function, origin, and termination

tract

RC Church an anthem in some Masses

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Tract

in the central nervous system, any one of several groups of closely placed nerve fibers having a common morphological structure and common functions. Tracts are divided by function into associative tracts, which unite various sections of the cerebral cortex in the same hemisphere; commisural tracts, which connect both hemispheres and ensure their cooperative activity; and projection tracts, which unite the cerebral cortex with lower brain formations and, through them, with the periphery.

Mentioned in

References in periodicals archive

This is because our study was based partly on Svendsen and colleagues' study [12], which examined the sensory functions belonging to the dorsal column-medial lemniscal pathway and the spinothalamic tract by both bedside sensory testing and quantitative sensory testing (QST).

Sensory Function and Chronic Pain in Multiple Sclerosis

The magnitude and significance of the correlations between these measures suggests that the same quantitative measures of sensory function used to determine the integrity of the spinothalamic tract system in healthy, nondisabled subjects and in persons in other patient populations may also be used in persons with SCI to reflect similar mechanisms.

Reliability and validity of quantitative sensory testing in persons with spinal cord injury and neuropathic pain

Five years ago, however, the Galveston researchers uncovered evidence that the bulk of the pain from the internal organs, or viscera, travels up the overlooked dorsal column, while the spinothalamic tract carries pain messages predominantly from the skin and muscles.

Pain, Pain, Go Away

Willis, "Glycine and GABAA antagonists reduce the inhibition of primate spinothalamic tract neurons produced by stimulation in periaqueductal gray," Brain Research, vol.

Noradrenaline, Serotonin, GABA, and Glycine in Cerebrospinal Fluid during Labor Pain: A Cross-Sectional Prospective Study

Symptoms of ASA syndrome include complete motor loss below the level of the lesion as well as loss of pain and temperature sensation due to loss of the corticospinal and spinothalamic tracts, respectively; this patient exhibited findings consistent with ASA syndrome.

A Case of Anterior Spinal Artery Syndrome Caused by Streptococcus mitis Endocarditis