Body position and direction of a moving object influence visual motion perception

Introduction: The perception of visual motion is essential for differentiating between moving and static objects. A recent study showed that it diminishes in normal subjects when an object moves at lower velocities[1]. Patients with bilateral vestibulopathy have higher motion coherence thresholds (MCT) than normal subjects, ranging between velocities of 0.15 to 40 deg/s. Their thresholds are also higher at low velocities[2,3]. This was hypothesized to indicate a compensatory mechanism for reducing oscillopsia caused by head movements [1,2,3]. In the current study healthy subjects were examined to determine if th…