VPB 121: Veterinary Physiology - II (2+1)

RUBRO SPINAL TRACT

• This is the more important motor tract in domestic animals.
• Arises from the red nucleus of the midbrain
• Decussates near its origin and enters the spinal cord contralateral to its origin
• Descends in the lateral funiculus throughout the entire length of the spinal cord
• There is always involvement of Internuncial neuron between the rubrospinal tract fibers and spinal alpha motor neurons
• They are rapidly conducting.
• This controls semi skilled movements.
• It functions to stimulate the flexor motor activity and inhibit the extensor and motor neuron activity.