Self-generated saccades do not modify the gain of adapted reactive saccades.
The gain of reactive saccades was manipulated in 17 subjects using a target-jump paradigm. Following adaptation three sub-groups were formed: (1) rest 15 min in the dark, eyes closed; (2) perform self-generated saccades for 15 min; (3) perform reactive saccades for 15 min. The series of saccades were the same in groups 2 and 3 (amplitude, sequence), except that group 3 performed fewer saccades (same number as the lowest number of saccades performed by one subject in group 2). Neither the rest period nor the series of self-generated saccades affected the adapted gain. The series of reactive saccades generated, by contrast, quick de-adaptation. These results support the conclusion that the gain of self-generated and reactive saccades is independently controlled.
Gaveau
Valérie
V
IFR 19 Institut Fédératif des Neurosciences de Lyon, Espace et Action INSERM Unité 534, 16 Avenue Lépine, 69676 Bron, France.
Alahyane
Nadia
N
Salemme
Roméo
R
Desmurget
Michel
M
D000222:Adaptation, Physiological / Q000502:physiology*; D001921:Brain / Q000502:physiology; D006801:Humans; D008959:Models, Neurological; D009415:Nerve Net / Q000502:physiology; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D012438:Saccades / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D014836:Volition / Q000502:physiology*