Oculo-auricular phenomenon
The oculo-auricular phenomenon, first described by Kinnier Wilson in 1908, is the phenomenon of an extreme lateral gaze inducing a slight but perceptible backwards movement of the upper part of the pinna. Wilson's phenomenon attracted considerable attention at the time because Wilson was well known and for its implications of Darwin's theory of natural selection. According to (Urban 1993), "In patients with brainstem disease abnormal transverse auricular muscle coactivation is characterized by absence of activity in one or both ear muscles during lateral gaze in either or both directions."