Which option is NOT a standard part of cold caloric testing?

Which option is NOT a standard part of cold caloric testing?

• A. Inducible eye movements in response to ice water irrigation
• B. Pupillary response to light
• C. Oculovestibular reflex testing
• D. Eye movements toward the ear during caloric testing

Answer: (B)

Caloric testing with cold irrigation assesses the vestibulo-ocular reflex by provoking eye movements through stimulation of the horizontal semicircular canal. The test looks for inducible eye movements in response to ice-water irrigation, which demonstrates that the brainstem pathways linking the vestibular system to ocular motor nerves are functioning. The oculovestibular reflex testing term covers this same process, focusing on the resulting nystagmus and its characteristics. Additionally, the eye movements toward the irrigated ear describe the expected slow phase toward that ear during caloric stimulation, followed by a quick corrective phase away. Pupillary response to light, however, is a separate reflex pathway tied to the optic and oculomotor nerves and midbrain, not part of cold caloric vestibular testing.

Caloric testing with cold irrigation assesses the vestibulo-ocular reflex by provoking eye movements through stimulation of the horizontal semicircular canal. The test looks for inducible eye movements in response to ice-water irrigation, which demonstrates that the brainstem pathways linking the vestibular system to ocular motor nerves are functioning. The oculovestibular reflex testing term covers this same process, focusing on the resulting nystagmus and its characteristics. Additionally, the eye movements toward the irrigated ear describe the expected slow phase toward that ear during caloric stimulation, followed by a quick corrective phase away. Pupillary response to light, however, is a separate reflex pathway tied to the optic and oculomotor nerves and midbrain, not part of cold caloric vestibular testing.