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Encyclopedia > Rubrospinal tract

The rubrospinal tract is part of the indirect extra-pyramidal tract and is responsible for large muscle movement such as the arms and the legs.

  Results from FactBites:
IX. Neurology. 4b. The Mid-brain or Mesencephalon. Gray, Henry. 1918. Anatomy of the Human Body. (3293 words)
The principal gray masses of the tegmentum are the red nucleus and the interpeduncular ganglion; of its fibers the chief longitudinal tracts are the superior peduncle, the medial longitudinal fasciculus, and the lemniscus.
The fibers of the spinothalamic fasciculi are continued from the spinal cord into this tract which passes upward in the reticular formation and the tegmentum to the thalamus along the dorsal side of the median lemniscus.
The fibers of the rubrospinal tract (bundle of Monakow) arise in the red nucleus, cross the midline in the decussation of Forel and pass downward in the formatio reticularis of the brainstem into the lateral funiculus of the spinal cord ventral to the crossed pyramidal tract.
Rubrospinal tract - Health Encyclopedia (179 words)
A distinct rubrospinal tract is found in certain rays which use their enlarged pectoral fins for locomotion.
The rubrospinal tract is thought to be involved in the control of both the flexor and extensor muscles, but even this is debated.
When the rubrospinal tract is transected in neonatal rats (Prendergast and Stelzner, '76) or cats (Bregman and Gold-berger, '82, '83), many axotomized neurons appear to undergo retrograde degeneration (the so-called Gudden effect; see review by Cowan, '70).
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