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Sign sensitivity according to the affected arterial territory.
| AICA sensitivity (%) | PICA sensitivity (%) | |
|---|---|---|
| Direction-changing nystagmus | 60 | 56.3 |
| Skew | 60 | 53.1 |
| HIT | 30 | 100 |
| Grade ataxia 1 | 0 | 9.4 |
| Ataxia 2 | 20 | 28.1 |
| Ataxia 3 | 80 | 62.5 |
| Ataxia 2–3 | 100 | 90.6 |
| Asynergy | 100 | 90.6 |
| HINTS | 100 | 100 |
| Ataxia 2–3 + nystagmus | 100 | 100 |
| Ataxia 2–3 + skew | 100 | 100 |
| Ataxia 2–3 + HIT | 100 | 100 |
