Internal representation of gaze direction with and without retinal inputs in man.
The contribution of retinal and extraretinal signals to the coding of eye position in the head was studied in human subjects (Ss). Horizontal saccades were produced in darkness. For some trials, before returning gaze direction to the starting position, a visual signal briefly stimulated the foveal retina. Results showed that this retinal input helped Ss to perceive gaze orientation more accurately after the saccade suggesting that the internal representation of eye position was improved when both extraretinal and retinal signals were available.
Blouin
J
J
Laboratoire de Contrôles Sensorimoteurs, CNRS Université de Provence, Marseille, France.
Gauthier
G M
GM
Vercher
J L
JL
D000161:Acoustic Stimulation; D003624:Darkness; D004585:Electrooculography; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D009949:Orientation / Q000502:physiology*; D010775:Photic Stimulation; D012044:Regression Analysis; D012160:Retina / Q000502:physiology*; D012438:Saccades / Q000502:physiology