Table 2.

Subject Test Findings.

Subject	SVV magnitude (degrees)	Antisaccade Task Error Rate (% misdirected)	Chair Impulse (A/N)	cVEMP (A/N)	oVEMP (A/N)
1	5.8	25
2	16.7	62.5
3	5.5	6.25
4	0.9	18.75	A	N	A
5	9.4	37.5
6	4.7	31.25
7	4	50
8	5.6	62.5
9	14.5	37.5
10	5.6	53
11	3.2	50	A	A	N
12	5.6	80
13	6.3	31.25
14	8.7	43	A	A	N
15	4.7	43	N	N	N
16	1	31.25	N	A	A
17	5.8	50
18	3.8	0	A	A	A
19	8.7	28.25	A	A	A
20	4.1	40	A	A	A
21	2.8	43	A	A	N
22	6	88	A	N	A
23	4.5	87.5	A	A	A
24	4.7	71
25	5.8	0	A	N	A

Subjective Visual Vertical (SVV) magnitude: an abnormal magnitude for Table 2 is greater than or equal to 3.2 degrees, which defines the lower fifth percentile from a group of 300 control subjects. A magnitude less than 3.2 degrees is within normal limits.

Antisaccade Error Rate. An abnormal error rate (incorrect saccade direction) is considered to be a value greater than or equal to 43%, which defines the lower fifth percentile from a group of 300 control subjects. Lower error rates are within normal limits. A zero entry means no errors.

Chair Impulse Test (Horizontal VOR)—HVOR ‐gain less than 0.80 at 100 degrees/sec impulse was termed abnormal (A). Higher values (>0.80) were defined as within normal limits (N).

Cervical Vestibular Evoked Myogenic Potential (cVEMP)—Abnormal (A) if amplitude less than 100 microvolts and/or greater than 35% amplitude asymmetry between sides. Patients not exceeding either threshold are within normal limits (N).

Ocular Vestibular Evoked Myogenic Potential (oVEMP)—Abnormal (A) if amplitude less than 3 microvolts and/or greater than 35% amplitude asymmetry between sides. Patients not exceeding either threshold are within normal limits (N).