reticulospinal tract

(neuroscience) Nerve fibers descending from large cells of the reticular formation of the pons and medulla into the spinal cord.

Any of several fiber tracts descending to the spinal cord from the reticular formation of the pons and medulla oblongata. Some fibers conduct impulses from the neural mechanisms regulating cardiovascular and respiratory functions to the spinal cord; others form links in extrapyramidal motor mechanisms affecting muscle tonus and somatic movement.