Figure 4.

Comparison of the effect of pharmacological treatment on the time course of pupil size during motor response. A: the time course of pupil size in the eye treated with tropicamide (red line) and the intact control eye (black) for each duration. B: the time course of pupil size in the eye treated with phenylephrine (blue line) and the intact control eye (black) for each duration. The shaded areas represent standard errors across participants.