Suppression of the E-effect during the subjective visual vertical test.
The subjective visual vertical was measured in 38 healthy subjects. The head was alternately roll-tilted to the right and to the left, and the start position of the light bar was alternately set clockwise and counterclockwise. When the head is tilted less than 60-70 degrees a deviation of the subjective visual vertical in the opposite direction to the head tilt is expected. This phenomenon has been reported in various studies as the E-effect. The present study demonstrates however that the E-effect is suppressed if the start position of the light bar is presented relatively parallel to the length axis of the tilted head.
Hoppenbrouwers
Mieke
M
Vestibular Function Laboratory, Dept of ENT, University of Antwerp, Wilrijkstraat 10, B-2650 Edegem, Belgium.
Wuyts
Floris L
FL
Van de Heyning
Paul H
PH
D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology; D008297:Male; D008875:Middle Aged; D009949:Orientation / Q000502:physiology*; D010775:Photic Stimulation; D004856:Postural Balance / Q000502:physiology*; D011434:Proprioception / Q000502:physiology*; D012444:Saccule and Utricle / Q000502:physiology; D013028:Space Perception / Q000502:physiology*