Figure 2.

Static depiction of the illusion of movement in darkness during paralysis. Subjects were presented with a point of light (indicate by +) in the center of the foveal field surrounded by darkness. When attempting to gaze away from the light (without actual movement of the foveal field due to paralysis), subjects report movement of the light with a trajectory consistent with the direction of attempted gaze. The perceptions were, consecutively: rest (A), attempted gaze to left (B), attempted gaze to right (C), and return (D). The solid black lines depict the trajectory of the illusory movement of the point of light. The arrows indicated the direction of the attempted gaze. The supplementary material shows an animation of this depiction.