Inner vestibulo-spinal orbit

Tractus vestibulo-spinalis medialis

Conduction pathway, vestibulo-spinal internal

The orbit, which contains both crossed and uncrossed threads, starts from the inner and slightly from the lower vestibular nucleus. The axons run in the fasciculus longitudinalis medialis and affect motor neuronactivity in the cervical spinal cord.

The vestibulo-spinalis medialis tractus is responsible for a kind of "head-lifter reflex" which means that, when the gaze is to be fixed in the horizontal plane, while folding the body forward, you automatically bend the head backwards.
(The reflex is activated, for example, when playing billiards and leaning over the edge of the pool table while aiming at the ball along the billiard queue.)