Table 1.
Characteristics of all subjects including age, gender, duration of symptoms, location of dysfunction, and laboratory test results for patients [ocular motor testing, positional testing, caloric testing, rotational chair testing, and vestibular-evoked myogenic potentials (VEMPs)] Subject groups include: Young Control (YC), Older Control (OC), Young Vestibular (YV), Older Vestibular (OV) (n = 90).
| YC | OC | YV | OV | |
|---|---|---|---|---|
|
| ||||
| N | 30 | 30 | 15 | 15 |
|
| ||||
| Age (years) | ||||
| Mean ± SD | 28 ± 6 | 77.2 ± 5 | 40 ± 11 | 66 ± 8 |
| Range | 19–45 | 68–85 | 25–55 | 56–81 |
|
| ||||
| Gender (male; %) | 17; 56% | 12; 40% | 5; 33% | 5; 33% |
|
| ||||
| Duration of symptoms (months) | N/A | N/A | ||
| Mean ± SD | 43 ± 78 | 31 ± 43 | ||
| Median | 7.5 | 12 | ||
| Range | 1–240 | 1–132 | ||
|
| ||||
| Location of dysfunction (n; %) | N/A | N/A | ||
| Peripheral | 7 (47%) | 9 (60%) | ||
| Central | 5 (33%) | 4 (27%) | ||
| Mixed | 3 (20%) | 2 (13%) | ||
|
| ||||
| Abnormal laboratory testing (n;%) | N/A | N/A | ||
| Ocular motor (abnormal timing of saccades) | 0 (0%) | 1 (7%) | ||
| Positional (slow component velocity > 6 deg/sec) | 5 (33%) | 7 (47%) | ||
| Caloric testing (reduced vestibular response > 24%) | 7 (47%) | 8 (53%) | ||
| Rotational testing (decreased gain or asymmetry) | 10 (67%) | 8 (53%) | ||
| Cervical VEMPs (asymmetry) | 5 (33%) | 8 (53%) | ||
N/A: Not applicable (control subjects)