Positional / primary gazeCentral · refer
Pure downbeat
A central red flag — think cerebellar.
Positional / primary gazeLive
Pure downbeat nystagmus with no torsion, no latency, persistent and non-fatigable, not suppressed by fixation. Do not treat as BPPV — refer for a central work-up (e.g. cerebellar or craniocervical-junction cause).
Source: Central positional nystagmus literature; AAO-HNS red-flag guidance.
Other signs
Stylised teaching animations authored by NeuroDash. Not real-patient recordings, not board-certified, and not reviewed by an outside specialist. Educational only — not medical advice or a diagnosis.