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(a) Vertical SC canals
| Involved SC canal | Diagnostic maneuver | Paroxysmal positioning nystagmus | |
|---|---|---|---|
| Vertical | Torsional | ||
| P-BPPV R | Dix-Hallpike R (+) | Upbeating | Counterclockwise |
| Dix-Hallpike L (−) | No nystagmus | ||
|
| |||
| P-BPPV L | Dix-Hallpike R (−) | No nystagmus | |
| Dix-Hallpike L (+) | Upbeating | Clockwise | |
|
| |||
| A-BPPV R | Dix-Hallpike R (+) | Downbeating | Counterclockwise |
| Dix-Hallpike L (+) | Downbeating | Counterclockwise | |
|
| |||
| A-BPPV L | Dix-Hallpike R (+) | Downbeating | clockwise |
| Dix-Hallpike L (+) | Downbeating | Clockwise | |
