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Titolo:
Prosopagnosia as a deficit in encoding curved surface
Autore:
Laeng, B; Caviness, VS;
Indirizzi:
Massachusetts Gen Hosp, Boston, MA 02114 USA Massachusetts Gen Hosp Boston MA USA 02114 Gen Hosp, Boston, MA 02114 USA Harvard Univ, Cambridge, MA 02138 USA Harvard Univ Cambridge MA USA 02138Harvard Univ, Cambridge, MA 02138 USA
Titolo Testata:
JOURNAL OF COGNITIVE NEUROSCIENCE
fascicolo: 5, volume: 13, anno: 2001,
pagine: 556 - 576
SICI:
0898-929X(20010701)13:5<556:PAADIE>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
FACE RECOGNITION; OBJECT RECOGNITION; VISUAL RECOGNITION; TOPOGRAPHIC PARCELLATION; UNFAMILIAR FACES; TEMPORAL CORTEX; PERCEPTION; SHAPE; MRI; HEMISPHERE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
92
Recensione:
Indirizzi per estratti:
Indirizzo: Laeng, B Univ Tromso, Dept Psychol, Asgardveien 9, N-9027 Tromso, Norway Univ Tromso Asgardveien 9 Tromso Norway N-9027 27 Tromso, Norway
Citazione:
B. Laeng e V.S. Caviness, "Prosopagnosia as a deficit in encoding curved surface", J COGN NEUR, 13(5), 2001, pp. 556-576

Abstract

RP is a case of "developmental" prosopagnosia who, according to brain-imaging segmentation data, shows a reduction in volume of a limited set of structures of the right hemisphere. RP is as accurate as control subjects in tasks requiring the perception of nonface objects (e.g., matching subordinatelabels to exemplars, naming two-tone images), with the exception of one perceptual task: The matching of different perspectives of amoebae-like stimuli (i.e.. volumes made of a single smooth surface). In terms of speed ("efficiency") of responses, RP's performance falls clearly outside the not niallimits also in other tasks that include "natural" but nonface stimuli (i.e., animals, artifacts). Specifically, RP is slow in perceptual judgements made at very low (subordinate) levels of semantic categorization and for objects and artifacts whose geometry present much curved features and surface information. We conclude from these analyses that prosopagnosia can be the result of a deficit in the representation of basic geometric volumes made of curved surface. In turn, this points to the importance (necessity) for the normal visual system of such curved and volumetric information in the identification of human faces.

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Documento generato il 29/02/20 alle ore 14:23:53