reticulospinal tract

re·tic·u·lo·spi·nal tract (r-tky-l-spnl)

n.

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.

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reticulospinal tract

spinal cord tract originating in the reticular formation in the brainstem and impinging on motor fibers arising in the spinal cord.