Which of the following is NOT typically considered a major region in central vestibular processing?

• A. Vestibular nuclei in brainstem
• B. Cerebellum
• C. Thalamus
• D. Hippocampus

Answer: (D)

Central vestibular processing relies on a core network that handles balance, gaze stabilization, and spatial orientation. The vestibular nuclei in the brainstem are the primary relay and integrative hub where raw vestibular signals are first processed and distributed to motor and reflex circuits. The cerebellum fine-tunes these signals, coordinating balance and eye movements through motor learning and predictive control. The thalamus serves as a key relay to cortical areas, conveying vestibular information for conscious perception of motion and space. The hippocampus, while it can be influenced by vestibular input and contributes to spatial memory and navigation, is not a primary center for central vestibular processing. Its role is more about using spatial cues to form memory and navigate, rather than directly integrating and coordinating vestibular signals for balance and gaze. Therefore, the hippocampus is not typically considered a major region in central vestibular processing.