Abstract：
:The purpose of this study was to identify brain regions underlying internally generated anticipatory biases toward locations where significant events are expected to occur. Subjects fixated centrally and responded to peripheral targets preceded by a spatially valid (predictive), invalid (misleading), or neutral central cue while undergoing fMRI scanning. In some validly cued trials, reaction time was significantly shorter than in trials with neutral cues, indicating that the cue had successfully induced a spatial redistribution of motivational valence, manifested as expectancy. The largest cue benefits led to selectively greater activations within the posterior cingulate and medial prefrontal cortex. These two areas thus appear to establish a neural interface between attention and motivation. An inverse relationship to cue benefit was seen in the parietal cortex, suggesting that spatial expectancy may entail the inhibition of attention-related areas to reduce distractibility by events at irrelevant locations.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Small DM,Gitelman DR,Gregory MD,Nobre AC,Parrish TB,Mesulam MMdoi
10.1016/s1053-8119(02)00012-5keywords:
subject
Has Abstractpub_date
2003-03-01 00:00:00pages
633-41issue
3eissn
1053-8119issn
1095-9572pii
S1053811902000125journal_volume
18pub_type
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