Neural correlates of visual localization and perisaccadic mislocalization
B. Krekelberg, M. Kubischik, K.-P Hoffmann & F. Bremmer
Neuron, 6: 537-545, 2003
- While reading this text, your eyes jump from word to word. Yet you are unaware of the motion this causes on
your retina; the brain somehow compensates for these displacements and creates a stable percept of the world. This
compensation is not perfect; perisaccadically, perceptual space is distorted. We show that this distortion can
be traced to a representation of retinal position in the medial temporal and medial superior temporal areas. These
cells accurately represent retinal position during fixation, but perisaccadically, the same cells distort the representation
of space. The time course and magnitude of this distortion are similar to the mislocalization found psychophysically
in humans. This challenges the assumption in many psychophysical studies that the perisaccadic retinal position
signal is veridical.
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