Table 1: Blink Reflex Test Results

Test Parameter Number of Criteria BRT* Abnormality per side BRT* Abnormality in patients
R1 Latency (All) 1) Left Stimulation 17/65 (26.2%) 26/65 (40%)
2) Right Stimulation 18/65 (27.7%)
R2 Ipsilateral Latency (All) 3) Left Stimulation 20/65 (30.8%) 35/65 (53.8%)
4) Right Stimulation 22/65 (33.8%)
R2 Contralateral Latency (All) 5) Left Stimulation 24/65 (36.9%) 34/65 (52.3%)
6) Right Stimulation 25/65 (38.5%)
R1 Latency (BS)

R2 Ipsilateral Latency (BS)

R2 Contralateral Latency (BS)
Left Stimulation 12/35 (34.3%) 16/35 (45.7%)§
Right Stimulation 12/35 (34.3%)
Left Stimulation 12/35 (34.3%) 16/35 (45.7%)§
Right Stimulation 12/35 (34.3%)
Left Stimulation 15/35 (45.7%) 22/35 (62.9%)
Right Stimulation 17/35 (48.6%)
ADDITIONAL CRITERIA
Left / right R1 >1.2ms 7) 19/65 (29.2%)
Ipsi- vs. Contra-lateral R2 >5ms 8) Left Stimulation 38/65 (58.5%) 48/65 (73.9%)
9) Right Stimulation 34/65 (52.3%)
Left&right stimulation R2 >7ms 10) Left R2 >7ms 28/65 (43.1%) 46/65 (70.8%)
11) Right R2 > 7ms 33/65 (50.8%)

* BRT: Blink Reflex Test.
All: All patients examined, regardless of brainstem involvement or not.
BS: Brainstem involvement, regardless of concurrent hemispheric involvement.
§ Note: it is a pure numerical coincidence that that percentage of abnormalities of R1 and ipsilateral R2 latencies in the brainstem are the same, as the patients from whom they were derived were not.