A right-beating nystagmus is elicited with the head-shaking induced nystagmus test.What does this response indicate?

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A right-beating nystagmus elicited with the head-shaking induced nystagmus test suggests a left unilateral vestibular hypofunction. This is because the direction of the nystagmus typically beats towards the side of the better functioning or stronger vestibular system. In this case, the right side is compensating for the left side's weakness, causing the eyes to drift slowly to the left (weak side) and then quickly correct back to the right, which is observed as right-beating nystagmus.

A Right-Beating Nystagmus Is Elicited with the Head-Shaking Induced Nystagmus