Fig. 2.

Unilateral lid restraint increases the excitability of blinks evoked by stimulation of the SO ipsilateral (Ipsi) to the restrained eyelid but not to stimulation of the contralateral (Contra) SO. For blinks evoked by the SO ipsilateral (●) and contralateral (○) to the restrained eyelid, the mean ± SEM excitability relative to the median prerestraint excitability for all subjects is plotted as a function of time after unilateral lid restraint for the 500 (A) and 1000 (B) msec interstimulus intervals. Lid restraint was removed at 165 min (Post, dashed line).