Table 1.
Nystagmus Slow-Phase Velocity (°/s), by Fast-Phase
| Sitting Upright | Supine | Right-Lateral | Left-Lateral | |||||||||||||
| Horiz. | DBN | UBN | Nil. | Horiz. | DBN | UBN | Nil. | Horiz. | DBN | UBN | Nil. | Horiz. | DBN | UBN | Nil. | |
| % | 16.8 | 6.0 | 6.9 | 70.3 | 26.7 | 89 | 19.8 | 44.6 | 39.6 | 6.0 | 8.9 | 45.5 | 34.7 | 6.8 | 4.0 | 54.5 |
| N | 17 | 6 | 7 | 71 | 27 | 9 | 20 | 45 | 40 | 6 | 9 | 46 | 35 | 7 | 4 | 55 |
| Mean | 3.4 | 4.8 | 3.7 | – | 3.9 | 3.9 | 4.1 | – | 4.7 | 6.2 | 4.6 | – | 4.2 | 6.2 | 3.1 | – |
| SD | 2.0 | 3.3 | 2.3 | – | 2.5 | 2.5 | 3.3 | – | 2.9 | 5.9 | 3.2 | – | 3.0 | 5.4 | 1.7 | – |
| Min. | 0.4 | 0.5 | 0.8 | – | 1.0 | 1.4 | 0.7 | – | 1.4 | 1.5 | 1.5 | – | 0.8 | 1.3 | 1.2 | – |
| Q1 | 1.8 | 1.4 | 1.5 | – | 2.0 | 2.1 | 2.0 | – | 2.3 | 2.1 | 2.9 | – | 2.1 | 2.0 | 1.4 | – |
| Med. | 3.5 | 5.1 | 4.3 | – | 3.0 | 3.3 | 3.4 | – | 3.7 | 2.8 | 3.4 | – | 3.1 | 4.1 | 3.1 | – |
| Q3 | 4.8 | 7.6 | 5.4 | – | 5.3 | 5.4 | 6.4 | – | 6.2 | 13.6 | 5.5 | – | 5.1 | 11.0 | 4.7 | – |
| Max. | 7.1 | 9.3 | 7.2 | – | 10.8 | 8.9 | 14.1 | – | 11.4 | 14.0 | 12.5 | – | 12.7 | 16.0 | 4.9 | – |
Nystagmus characteristics of 101 normal controls by nystagmus fast-phase, in four positions. [RBN; Right-beating nystagmus, LBN; Left-beating nystagmus, UBN; Up-beating nystagmus, DBN; Down-beating nystagmus; Max.; Maximum, Med.; Median, Min.; Minimum, Nil.; No nystagmus, Q1; First quartile, Q3; Third quartile, SD; Standard deviation, °/s; Degrees per second, %; Percentage of total subjects].