Endogenous and exogenous attention shifts are mediated by the same large-scale neural network.

Event-related fMRI was used to examine the neural basis of endogenous (top-down) and exogenous (bottom-up) spatial orienting. Shifts of attention were induced by central (endogenous) or peripheral (exogenous) cues. Reaction times on subsequently presented targets showed the expected pattern of facilitation and inhibition in both conditions. No difference in brain activity was observed when the two orienting conditions were contrasted with a liberal threshold, showing that both forms of orienting were mediated by the same neural network. Compared to within-block control trials, both endogenous and exogenous orienting activated a fronto-parietal network consisting of premotor cortex, posterior parietal cortex, medial frontal cortex and right inferior frontal cortex. Within these regions, equally strong activation was observed for both orienting conditions. It is concluded that endogenous and exogenous orienting are mediated by the same large-scale network of frontal and parietal brain areas.



Titolo: Endogenous and exogenous attention shifts are mediated by the same large-scale neural network.
Autori: Peelen, Marius Vincent; D. J., Heslenfeld; J., Theeuwes
Autori Unitn: 
Peelen, Marius Vincent
mostra contributor esterni 
Titolo del periodico: NEUROIMAGE
Anno di pubblicazione: 2004
Codice identificativo Pubmed: 15193611
Digital Object Identifier (DOI): 10.1016/j.neuroimage.2004.01.044
Handle: http://hdl.handle.net/11572/91130
Appare nelle tipologie:03.1 Articolo su rivista (Journal article)

File in questo prodotto:
Non ci sono file associati a questo prodotto.
Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/11572/91130
  • Citazioni
  • ND
  • ND

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
 
 
 
Powered by IRIS-about IRIS-Utilizzo dei cookie
Logo CINECA  Copyright © 2020