Rubrospinal Tract

The rubrospinal tract (shown in red) is formed by projection neurons that make up the red nucleus.

Tract axons immediately decussate and descend to the spinal cord, where they run in the dorsal half of the lateral funiculus (overlapping the lateral corticospinal tract).

Rubrobulbar fibers go to cranial nerve motor nuclei.

The rubrospinal tract is the principal voluntary movement tract in domestic mammals, and the dorsal half of the lateral funiculus is where the major pathways for voluntary movement descend in the spinal cord.

(The tectospinal tract, and tectobulbar fibers, are shown in blue.)