title: Automatic online control of motor adjustments in reaching and grasping.
abstract: Following the princeps investigations of Marc Jeannerod on action-perception, specifically, goal-directed movement, this review article addresses visual and non-visual processes involved in guiding the hand in reaching or grasping tasks. The contributions of different sources of correction of ongoing movements are considered; these include visual feedback of the hand, as well as the often-neglected but important spatial updating and sharpening of goal localization following gaze-saccade orientation. The existence of an automatic online process guiding limb trajectory toward its goal is highlighted by a series of princeps experiments of goal-directed pointing movements. We then review psychophysical, electrophysiological, neuroimaging and clinical studies that have explored the properties of these automatic corrective mechanisms and their neural bases, and established their generality. Finally, the functional significance of automatic corrective mechanisms-referred to as motor flexibility-and their potential use in rehabilitation are discussed.
authors: INSERM, U1028, CNRS, UMR5292, Lyon Neurosciences Research Center, ImpAct, 16 avenue du doyen Lépine, 69676 Bron cedex, France; Université Lyon 1, Villeurbanne, France.
authors: Valérie
authors: V
authors: Gaveau
authors: INSERM, U1028, CNRS, UMR5292, Lyon Neurosciences Research Center, ImpAct, 16 avenue du doyen Lépine, 69676 Bron cedex, France; Université Lyon 1, Villeurbanne, France.
authors: Laure
authors: L
authors: Pisella
authors: INSERM, U1028, CNRS, UMR5292, Lyon Neurosciences Research Center, ImpAct, 16 avenue du doyen Lépine, 69676 Bron cedex, France; Institut de recherche biomédicale des armées (IRBA), BP 73, 91223 Brétigny-sur-Orge cedex, France.
authors: Anne-Emmanuelle
authors: AE
authors: Priot
authors: INSERM, U1028, CNRS, UMR5292, Lyon Neurosciences Research Center, ImpAct, 16 avenue du doyen Lépine, 69676 Bron cedex, France.
authors: Takao
authors: T
authors: Fukui
authors: INSERM, U1028, CNRS, UMR5292, Lyon Neurosciences Research Center, ImpAct, 16 avenue du doyen Lépine, 69676 Bron cedex, France; Université Lyon 1, Villeurbanne, France.
authors: Yves
authors: Y
authors: Rossetti
authors: INSERM, U1028, CNRS, UMR5292, Lyon Neurosciences Research Center, ImpAct, 16 avenue du doyen Lépine, 69676 Bron cedex, France; Université Lyon 1, Villeurbanne, France.
authors: Denis
authors: D
authors: Pélisson
authors: INSERM, U1028, CNRS, UMR5292, Lyon Neurosciences Research Center, ImpAct, 16 avenue du doyen Lépine, 69676 Bron cedex, France; Université Lyon 1, Villeurbanne, France. Electronic address: claude.prablanc@inserm.fr.
authors: Claude
authors: C
authors: Prablanc
mesh_terms: D000818:Animals; D001132:Arm / Q000502:physiology*; D006225:Hand / Q000502:physiology*; D018737:Hand Strength / Q000502:physiology; D006801:Humans; D011597:Psychomotor Performance / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology
keywords: Double-step paradigm; Eye movements; Eye-hand coordination; Grasping; Motor flexibility; Online control of movement; Parietal cortex; Reaching; Rehabilitation; Saccade