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Brain Advance Access published online on February 4, 2004
Brain, doi:10.1093/brain/awh071
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© 2004 The Guarantors of Brain

Article

The role of human parietal cortex in attention networks

Shihui Han 1, Yi Jiang 2, Hua Gu 3, Hengyi Rao 2, Lihua Mao 2, Yong Cui 3, and Renyou Zhai 3

1 Department of Psychology, Centre for Brain and Cognitive Sciences, Peking University, Beijing, People’s Republic of China; Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, People’s Republic of China
2 Department of Psychology, Centre for Brain and Cognitive Sciences, Peking University, Beijing, People’s Republic of China
3 Department of Radiology, Beijing Chaoyang Hospital, Beijing, People’s Republic of China

Received 15 February 2003 ; revised 2 November 2003 ; accepted 9 November 2003

Abstract

The parietal cortex has been proposed as part of the neural network for guiding spatial attention. However, it is unclear to what degree the parietal cortex contributes to the attentional modulations of activities of the visual cortex and the engagement of the frontal cortex in the attention network. We recorded behavioural performance and haemodynamic responses using functional MRI from a patient with focal left parietal damage in covert visual orienting tasks requiring detection of targets at the attended or unattended locations. While the patient’s reaction times to left visual field stimuli were speeded by valid relative to invalid cues, attention to LVF stimuli was associated with enhanced activities in the right extrastriate cortex, right parietal and cingulate cortices, and bilateral frontal cortices. However, the patient’s behavioural and neural responses to right visual field stimuli were not influenced by cue validity. The results are discussed in terms of the role of human parietal cortex in the neural network underlying voluntary attentional control.

Keywords: cue validity; ERP; fMRI; parietal cortex; spatial attention
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