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- W2015019282 abstract "Macaque neurophysiology and human neuropsychology results suggest that parietal cortex encodes a unique representation of space within reach of the arm. Here, we used slow event-related functional magnetic resonance imaging (fMRI) to investigate whether human brain areas involved in reaching are more activated by objects within reach versus beyond reach. In experiment 1, graspable objects were placed at three possible locations on a platform: two reachable locations and one beyond reach. On some trials, participants reached to touch or grasp objects at the reachable location; on other trials participants passively viewed objects at one of the three locations. A reach-related area in the superior parieto-occipital cortex (SPOC) was more activated for targets within reach than beyond. In experiment 2, we investigated whether this SPOC response occurred when visual and motor confounds were controlled and whether it was modulated when a tool extended the effective range of the arm. On some trials, participants performed grasping and reaching actions to a reachable object location using either the hand alone or a tool; on other trials, participants passively viewed reachable and unreachable object locations. SPOC was significantly more active for passively viewed objects within reach of the hand versus beyond reach, regardless of whether or not a tool was available. Interestingly, these findings suggest that neural responses within brain areas coding actions (such as SPOC for reaching) may reflect automatic processing of motor affordances (such as reachability with the hand)." @default.
- W2015019282 created "2016-06-24" @default.
- W2015019282 creator A5019440281 @default.
- W2015019282 creator A5024798505 @default.
- W2015019282 creator A5047144483 @default.
- W2015019282 date "2009-04-08" @default.
- W2015019282 modified "2023-10-14" @default.
- W2015019282 title "Is That within Reach? fMRI Reveals That the Human Superior Parieto-Occipital Cortex Encodes Objects Reachable by the Hand" @default.
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- W2015019282 doi "https://doi.org/10.1523/jneurosci.0377-09.2009" @default.
- W2015019282 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6665734" @default.
- W2015019282 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19357266" @default.
- W2015019282 hasPublicationYear "2009" @default.
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