Artículo de revista
Exogenous orienting of visual-spatial attention in ADHD children
Fecha
2013Registro en:
Brain Research, Volumen 1493,
00068993
18726240
10.1016/j.brainres.2012.11.036
Autor
Ortega, Rodrigo
López, Vladimir
Carrasco, Ximena
Anllo-Vento, Lourdes
Aboitiz, Francisco
Institución
Resumen
Visual spatial orienting of attention towards exogenous cues has been one of the attentional functions considered to be spared in ADHD. Here we present a design in which 60 (30 ADHD) children, age: 10.9±1.4, were asked to covertly orient their attention to one or two (out of four) cued locations, and search for a target stimulus in one of these locations, while recording behavioral responses and EEG/ERP. In all conditions, ADHD children showed delayed reaction times and poorer behavioral performance. They also exhibited larger cue-elicited P2 but reduced CNV in the preparation stage. Larger amplitude of CNV predicted better performance in the task. Target-elicited N1 and selection negativity were also reduced in the ADHD group compared to non-ADHD. Groups also differed in the early and late P3 time-windows. The present results suggest that exogenous orienting of attention could be dysfunctional in ADHD under certain conditions. This limitation is not necessarily caused by an impairment