descending tract
any bundle of nerve fibers conveying impulses from the brain toward target nuclei at lower levels of the nervous system.

Medical dictionary. 2011.

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  • Descending colon — Front of abdomen, showing surface markings for liver, stomach, and great intestine. (Descending colon visible at center right, in blue.) …   Wikipedia

  • tract — An elongated area, e.g., path, track, way. SEE ALSO: fascicle. SYN: tractus. [L. tractus, a drawing out] alimentary t. SYN: digestive t.. anterior corticospinal t. uncrossed fibers forming a small bundle in the anterior funiculus of the …   Medical dictionary

  • descending — Running downward or toward the periphery. SYN: descendens. [L. de scendo, pp. scensus, to come down, fr. scando, to climb] * * * de·scend·ing dē .sen diŋ, di adj 1) moving or directed downward <descending infection from the kidney (Therapeutic …   Medical dictionary

  • descending urography — excretion urography, excretory urography, intravenous urography radiographic examination of the urinary tract after the intravenous injection of an opaque medium that is rapidly excreted in the urine …   Medical dictionary

  • Corticospinal tract — Pyramidal tract redirects here. This page refers to the nerve fibres underlying the pyramids. For the actual area of the brain, Pyramids, see Pyramid of medulla oblongata. Brain: Corticospinal tract Deep dissection of brain stem. Lateral view. (… …   Wikipedia

  • Corticobulbar tract — Brain: Corticobulbar tract Components and location of the corticobulbar tract. Latin tractus corticonuclearis NeuroNames …   Wikipedia

  • Tectospinal tract — Diagram showing possible connection of long descending fibers from higher centers with the motor cells of the ventral column through association fibers. ( Tectospinal fasciculus labeled at center right.) …   Wikipedia

  • Anterior corticospinal tract — seen in red at bottom center in figure (text tag found at upper left) …   Wikipedia

  • Dorsal spinocerebellar tract — Posterior spinocerebellar tract is labeled in blue at right …   Wikipedia

  • Dentatothalamic tract — Brain: Dentatothalamic tract Latin tractus dentatothalamicus NeuroNames hier 525 NeuroLex ID birnlex 1104 The dentatothalamic tract (or de …   Wikipedia

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