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Posterior parietal cortex control of reach‐to‐grasp movements in humans
Author(s) -
Chapman Heidi,
Gavrilescu Maria,
Wang Hong,
Kean Michael,
Egan Gary,
Castiello Umberto
Publication year - 2002
Publication title -
european journal of neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.346
H-Index - 206
eISSN - 1460-9568
pISSN - 0953-816X
DOI - 10.1046/j.1460-9568.2002.02021.x
Subject(s) - intraparietal sulcus , superior parietal lobule , posterior parietal cortex , grasp , inferior parietal lobule , functional magnetic resonance imaging , parietal lobe , neuroscience , psychology , sulcus , cortex (anatomy) , central sulcus , motor cortex , computer science , stimulation , programming language
The aim of the present study was to ascertain the neural correlates for the integration of visual information with the control of the reach‐to‐grasp action in the healthy human brain. Nine adult subjects (18–38 years; four females and five males) were scanned using functional magnetic resonance imaging while reaching‐to‐grasp a three‐dimensional target. Results demonstrated differential activation of the parietal cortices according to the number of potential targets to be taken into account before movement initiation and the variability of target location. Comparing conditions where a target object that can appear at an unpredictable location with conditions where the target object appears at a predictable location revealed activations in the left superior parietal lobule, the left parieto‐occipital sulcus and the right intraparietal sulcus. Results are discussed in terms of visual selective attention and action planning.