What is "aftersensation"

Aftersensation \Aft"er*sen*sa`tion\, n. (Psychol.) A sensation or sense impression following the removal of a stimulus producing a primary sensation, and reproducing the primary sensation in positive, negative, or complementary form. The aftersensation may be continuous with the primary sensation or follow it after an interval.

n. an image (usually a negative image) that persists after stimulation has ceased [syn: afterimage]