Vestibulospinal tract (VST)

The **vestibulospinal tract** is a descending neural pathway within the central nervous system that originates from the vestibular nuclei in the brainstem. It is not a molecule or receptor but rather a bundle of nerve fibers responsible for transmitting signals from the brain to spinal motor neurons. The primary function of this tract is to maintain upright posture, balance, and head stabilization by activating antigravity muscles—mainly extensors in the limbs—in response to changes detected by the inner ear's vestibular apparatus[1][2][3][4]. There are two main components: - **Lateral vestibulospinal tract:** Originates from the lateral vestibular nucleus; descends ipsilaterally through the spinal cord; activates extensor muscles throughout body for maintaining upright posture. - **Medial vestibulospinal tract:** Originates from medial/inferior vestibular nuclei; descends bilaterally via medial longitudinal fasciculus; primarily influences neck and upper back muscles for head stabilization. Damage to these pathways can cause loss of balance, abnormal reflexes (such as positive Romberg’s test), ataxia, or postural instability[1]. The term "vestibulo-spinal pathway" refers collectively to these tracts but does not denote a druggable molecular target such as an enzyme or receptor. **Note:** This entry is marked as incorrect because "Vestibulo-spinal pathway" refers to an anatomical neural circuit/pathway rather than a discrete molecular target suitable for pharmacological intervention.

Other names

Vestibulo-spinal pathwayvestibulospinal tracts (plural)medial vestibulospinal tractlateral vestibulospinal tract