High-Speed Video-Oculography for Measuring Three-Dimensional Rotation Vectors of Eye Movements in Mice
Fig 5
Vestibulo-ocular reflex (VOR) data for mouse A.
(A) Data for the position of the turntable during rotation. (B) X component of the rotation vector of eye position during rotation. (C) Y component of the rotation vector of eye position during rotation. (D) Z component of the rotation vector of eye position during rotation. The Z component was in phase with the X and Y components, but it was 180° out of phase with the turntable shown in (A). (E) Changes in the length of the minor and major axes of the pupil ellipse during rotation. The length of the major axis of the pupil ellipse was almost constant during rotation. The length of the minor axis of pupil ellipse changed in phase with the Z component phase, as shown in (D). (F) Velocity data of the turntable during rotation. (G) X component of the rotation vector of eye velocity during rotation. The length of the minor axis of the pupil ellipse changed in phase with the Z component change, as shown in (D). (F) Velocity data for the turntable during rotation. (G) X component of rotation vectors of eye velocity during rotation. (H) Y component of rotation vectors of eye velocity during rotation. (I) Z component was the main component of the rotation vectors of eye movement. X and Y component values were low. Z component was 180° and was out of phase with the turntable, as shown in (F). (J) Angular velocity of eye rotation around the axis of rotation. As the value of the rotation vectors of eye velocity were always positive, we let the sign of angular velocity of eye rotation around the axis of rotation coincide with the Z component of the rotation vector of eye velocity. We calculated the gain and phase of VOR using these data.