rubrospinal

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.

IX. Neurology. 4b. The Mid-brain or Mesencephalon 1918

The axons of its larger cells cross the middle line and are continued downward into the lateral funiculus of the medulla spinalis as the rubrospinal tract (page 761); those of its smaller cells end mainly in the thalamus.

IX. Neurology. 4b. The Mid-brain or Mesencephalon 1918

The rubrospinal fibers end either directly or indirectly by terminals and collaterals about the motor cells in the anterior column on the side opposite from their origin in the red nucleus.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918

The rubrospinal tract forms an important part of the pathway from the cerebellum to the lower motor centers.

IX. Neurology. 4b. The Mid-brain or Mesencephalon 1918

The rubrospinal fasciculus arises from the large cells of the red nucleus.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918

Since the red nucleus is intimately related to the cerebellum by terminals and collaterals of the superior peduncle which arises in the dentate nucleus of the cerebellum, the rubrospinal fasciculus is supposed to be concerned with cerebellar reflexes, complex motor coördinations necessary in locomotion and equilibrium.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918

The reflex arc is completed by fibers in the superior peduncle which pass to the red nucleus and the thalamus and thence by additional neurons (rubrospinal tract) to the motor centers.

IX. Neurology. 4a. The Hind-brain or Rhombencephalon 1918

The rubrospinal fasciculus is supposed to be concerned with cerebellar reflexes since fibers which pass from the cerebellum through the superior peduncle send many collaterals and terminals to the red nucleus.

IX. Neurology. 3. The Spinal Cord or Medulla Spinalis 1918

In the medulla the two bundles are more or less intermingled and the tectospinal portion is continued into the antero-lateral funiculus of the spinal cord ventral to the rubrospinal fasciculus with which some of its fibers are intermingled.

IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918

In the medulla oblongata and spinal cord its fibers are more or less intermingled with the medial longitudinal bundle and the rubrospinal tract.

IX. Neurology. 4b. The Mid-brain or Mesencephalon 1918