Identifying objects seen from different viewpoints. A PET investigation
Positron emission tomography scans were acquired when subjects performed three tasks, each in a separate block of trials. They decided whether words named pictures of objects viewed from a canonical perspective, decided whether words named pictures of objects viewed from a non-canonical (unusual) pe...
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| Published in | Brain (London, England : 1878) Vol. 117 ( Pt 5); p. 1055 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
England
01.10.1994
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| Abstract | Positron emission tomography scans were acquired when subjects performed three tasks, each in a separate block of trials. They decided whether words named pictures of objects viewed from a canonical perspective, decided whether words named pictures of objects viewed from a non-canonical (unusual) perspective or saw random patterns of lines and pressed a pedal when they heard the word (this was a baseline condition). The dorsolateral prefrontal region was activated when subjects identified objects seen from non-canonical perspectives, as expected if the frontal lobes are involved in top-down perceptual processing. In addition, several areas in the occipital, temporal and parietal lobes were selectively activated when subjects identified objects seen from non-canonical perspectives, as specifically predicted by a recent theory. Overall, the pattern of results supported the view that the human brain identifies objects by using a system of areas similar to that suggested by studies of other primates. |
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| AbstractList | Positron emission tomography scans were acquired when subjects performed three tasks, each in a separate block of trials. They decided whether words named pictures of objects viewed from a canonical perspective, decided whether words named pictures of objects viewed from a non-canonical (unusual) perspective or saw random patterns of lines and pressed a pedal when they heard the word (this was a baseline condition). The dorsolateral prefrontal region was activated when subjects identified objects seen from non-canonical perspectives, as expected if the frontal lobes are involved in top-down perceptual processing. In addition, several areas in the occipital, temporal and parietal lobes were selectively activated when subjects identified objects seen from non-canonical perspectives, as specifically predicted by a recent theory. Overall, the pattern of results supported the view that the human brain identifies objects by using a system of areas similar to that suggested by studies of other primates. |
| Author | Rauch, S L Anderson, A K Chabris, C F Kosslyn, S M Alpert, N M Thompson, W L |
| Author_xml | – sequence: 1 givenname: S M surname: Kosslyn fullname: Kosslyn, S M organization: Department of Psychology, Harvard University, Cambridge, MA 02138 – sequence: 2 givenname: N M surname: Alpert fullname: Alpert, N M – sequence: 3 givenname: W L surname: Thompson fullname: Thompson, W L – sequence: 4 givenname: C F surname: Chabris fullname: Chabris, C F – sequence: 5 givenname: S L surname: Rauch fullname: Rauch, S L – sequence: 6 givenname: A K surname: Anderson fullname: Anderson, A K |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/7953588$$D View this record in MEDLINE/PubMed |
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| Title | Identifying objects seen from different viewpoints. A PET investigation |
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