Optic ataxia errors depend on remapped, not viewed, target location.
Optic ataxia is a disorder associated with posterior parietal lobe lesions, in which visually guided reaching errors typically occur for peripheral targets. It has been assumed that these errors are related to a faulty sensorimotor transformation of inputs from the 'ataxic visual field'. However, we show here that the errors observed in the contralesional field in optic ataxia depend on a dynamic gaze-centered internal representation of reach space.
Khan
A Z
AZ
Espace et Action, Institut National de la Santé et de la Recherche Médicale, U534, Institut Fédératif des Neurosciences Lyon, 16 avenue Doyen Lépine, 69676, Bron, France.
Pisella
L
L
Vighetto
A
A
Cotton
F
F
Luauté
J
J
Boisson
D
D
Salemme
R
R
Crawford
J D
JD
Rossetti
Y
Y
D000328:Adult; D001259:Ataxia / Q000503:physiopathology*; D004585:Electrooculography / Q000379:methods; D005133:Eye Movements / Q000502:physiology; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D009949:Orientation; D010296:Parietal Lobe / Q000293:injuries / Q000503:physiopathology*; D011597:Psychomotor Performance / Q000502:physiology*; D012438:Saccades / Q000502:physiology; D013647:Task Performance and Analysis; D013997:Time Factors; D014794:Visual Fields / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*