Lateral vestibular pathway descends ipsilaterally to which structure?

Lateral vestibular pathway descends ipsilaterally to which structure?

• A. Cerebellum
• B. Dorsal horn of spinal cord
• C. Ventral horn of spinal cord
• D. Medulla

Answer: (C)

Lateral vestibulospinal signaling influences posture by targeting the ventral horn of the spinal cord. The lateral vestibular tract carries signals from the lateral vestibular nucleus down the same side of the spinal cord and synapses on alpha motor neurons (and interneurons) in the ventral horn to drive extensor muscles. This ipsilateral projection helps maintain upright posture and balance by activating antigravity muscles in the limbs. The other structures aren’t the end point for this pathway: the dorsal horn handles sensory processing, the cerebellum is involved in coordination but not the direct motor termination of this tract, and the medulla is part of the brainstem region where the nucleus lies and through which the fibers pass, not where they terminate.

Lateral vestibulospinal signaling influences posture by targeting the ventral horn of the spinal cord. The lateral vestibular tract carries signals from the lateral vestibular nucleus down the same side of the spinal cord and synapses on alpha motor neurons (and interneurons) in the ventral horn to drive extensor muscles. This ipsilateral projection helps maintain upright posture and balance by activating antigravity muscles in the limbs.

The other structures aren’t the end point for this pathway: the dorsal horn handles sensory processing, the cerebellum is involved in coordination but not the direct motor termination of this tract, and the medulla is part of the brainstem region where the nucleus lies and through which the fibers pass, not where they terminate.