PMC6458853_01
Video-oculographic recording of upbeat nystagmus (maximum slow phase velocity about 9.0 /s) in a straight supine position during the head roll test. A: the moment of the straight supine position and B: the moment of turning the head position from straight to the left ear-down supine position.
CRIOT2019-4281641.001.jpg
PMC6458853_01_CRIOT2019-4281641.001.jpg
fig1
The supine head roll test revealed upbeat nystagmus for >110 s with a latency of 2 s on changing from the upright seated to straight supine position (Figure 1).