10/13/2026
This was present in both dix hall pike positions (head turned about halfway to the side, laying down, and head extended over a pillow)
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This is a down beating nystagmus. Nystagmus is an involuntary eye movement/ reflex with a fast and slow phase. When brought on with positional testing (as described above), it usually indicates BPPV. However, some nystagmus patterns (such as downbeat) can be due to dysfunction in the central nervous system (brain). This particular person has vestibular migraine.
Viewed with Vestibular First infrared video goggles.