P. Grasby

Publications1,277
h-index69
Citations18,577
Highly Influential Citations716
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Investigations of the functional anatomy of attention using the stroop test
TLDR
The results provide evidence for the involvement of anterior right hemisphere and medial frontal structures in attentional tasks but also indicate that time effects can confound task specific activations.
Meta-analysis, database, and meta-regression of 98 structural imaging studies in bipolar disorder.
TLDR
The meta-analyses revealed robust but regionally nonspecific changes of brain structure in bipolar disorder and revealed individual studies will remain underpowered unless sample size is increased or improvements in phenotypic selection and imaging methods are made to reduce within-study heterogeneity.
Evidence for striatal dopamine release during a video game
TLDR
Behaviour conditions under which dopamine is released in humans are shown for the first time, and the ability of positron emission tomography to detect neurotransmitter fluxes in vivo during manipulations of behaviour is illustrated.
Contrasting Cortical and Subcortical Activations Produced by Attentional-Set Shifting and Reversal Learning in Humans
TLDR
It is proposed that the PFC may contribute to the control of attentional-set by modulating attentional processes mediated by occipito-temporal pathways in distinct cortical and subcortical neural stations.
A fronto-parietal network for rapid visual information processing: a PET study of sustained attention and working memory
TLDR
The functional anatomy of the RVIP task is investigated using positron emission tomography derived measures of regional cerebral blood flow (rCBF) in eight healthy volunteers and it is suggested that these data are consistent with the existence of a right fronto-parietal network for sustained, and possibly selective, attention, and a left frontospecific network for the phonological loop component of working memory.
Brain regions associated with acquisition and retrieval of verbal episodic memory
TLDR
The results provide clear evidence that episodic memory involves a network of specific prefrontal and posterior structures which can be fractionated into different component processes.
Generic brain activation mapping in functional magnetic resonance imaging: a nonparametric approach.
TLDR
A novel method to identify brain regions generically activated by periodic experimental design in functional magnetic resonance imaging data by constructing a generic brain activation map is reported.
A PET study of voluntary movement in schizophrenic patients experiencing passivity phenomena (delusions of alien control).
TLDR
These hyperactive cerebral regions subserve attention to internal and external bodily space, and the attribution of significance to sensory information, they provide a plausible anatomical substrate for the misattribution of internally generated acts to external entities.
Tracer Kinetic Modeling of the 5-HT1AReceptor Ligand [carbonyl-11C]WAY-100635 for PET
TLDR
It is concluded that a simplified reference tissue approach may be used to quantify 5-HT1A binding either in terms of ROI data or as parametric images.
Brain serotonin1A receptor binding measured by positron emission tomography with [11C]WAY-100635: effects of depression and antidepressant treatment.
TLDR
Binding potential values were reduced across many of the regions examined, including frontal, temporal, and limbic cortex in both unmedicated and medicated depressed patients compared with healthy volunteers.
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