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Differential Processing of Isolated Object and Multi-item Pop-Out Displays in LIP and PFC.
Meyers, Ethan M; Liang, Andy; Katsuki, Fumi; Constantinidis, Christos.
Afiliación
  • Meyers EM; Center for Brains, Minds and Machines, Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Liang A; School of Cognitive Science, Hampshire College, Amherst, MA, USA.
  • Katsuki F; Center for Brains, Minds and Machines, Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Constantinidis C; Department of Psychiatry, VA Boston Healthcare System, Harvard Medical School, West Roxbury, MA, USA.
Cereb Cortex ; 28(11): 3816-3828, 2018 11 01.
Article en En | MEDLINE | ID: mdl-29040434
Objects that are highly distinct from their surroundings appear to visually "pop-out." This effect is present for displays in which: (1) a single cue object is shown on a blank background, and (2) a single cue object is highly distinct from surrounding objects; it is generally assumed that these 2 display types are processed in the same way. To directly examine this, we applied a decoding analysis to neural activity recorded from the lateral intraparietal (LIP) area and the dorsolateral prefrontal cortex (dlPFC). Our analyses showed that for the single-object displays, cue location information appeared earlier in LIP than in dlPFC. However, for the display with distractors, location information was substantially delayed in both brain regions, and information first appeared in dlPFC. Additionally, we see that pattern of neural activity is similar for both types of displays and across different color transformations of the stimuli, indicating that location information is being coded in the same way regardless of display type. These results lead us to hypothesize that 2 different pathways are involved processing these 2 types of pop-out displays.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Lóbulo Parietal / Reconocimiento Visual de Modelos / Corteza Prefrontal / Neuronas Límite: Animals Idioma: En Revista: Cereb Cortex Asunto de la revista: CEREBRO Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Lóbulo Parietal / Reconocimiento Visual de Modelos / Corteza Prefrontal / Neuronas Límite: Animals Idioma: En Revista: Cereb Cortex Asunto de la revista: CEREBRO Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos