Video-3.mp4

Inversion test (transitioning from right half Dix-Hallpike position to left lateral recumbent with nose down) elicits a complex pattern of nystagmus, beginning with a rapid, 10-second horizontal nystagmus directed towards the left, transitioning into a brief torsional downbeating nystagmus, and culminating in a persistent horizontal nystagmus directed towards the right.