Which statement describes caloric testing limitations?

• A. It only assesses utricle
• B. It is perfect and has no limitations
• C. It is able to test all frequencies equally
• D. It has low-frequency specificity and limited central integration

Answer: (D)

Caloric testing limitations center on two ideas: the frequency of stimulation and how much of the brain’s vestibular processing it engages. The test uses warm or cold irrigation to move endolymph, which evokes a response that corresponds to extremely low-frequency head movements. It mainly assesses the horizontal semicircular canal on the peripheral side, not the other canals or otolith organs. Because it probes a narrow, low-frequency aspect of vestibular function and isolates peripheral input, it doesn’t reflect how the vestibular system handles typical higher-frequency head movements or how central pathways integrate vestibular signals with other brain systems. That’s why caloric testing is described as having low-frequency specificity and limited central integration. The statement aligns with the reality that it doesn’t test all frequencies, isn’t perfect, and isn’t limited to just utricle function.