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Neuropsychological dysfunction in depression: the relationship to regional cerebral blood flow

Published online by Cambridge University Press:  09 July 2009

R. J. Dolan*
Affiliation:
MRC Cyclotron Unit, Hammersmith Hospital; Academic Department of Psychiatry, Royal Free Hospital and School of Medicine; National Hospital for Neurology and Neurosurgery; MRC Human Movement and Balance Unit, National Hospital, London
C. J. Bench
Affiliation:
MRC Cyclotron Unit, Hammersmith Hospital; Academic Department of Psychiatry, Royal Free Hospital and School of Medicine; National Hospital for Neurology and Neurosurgery; MRC Human Movement and Balance Unit, National Hospital, London
R. G. Brown
Affiliation:
MRC Cyclotron Unit, Hammersmith Hospital; Academic Department of Psychiatry, Royal Free Hospital and School of Medicine; National Hospital for Neurology and Neurosurgery; MRC Human Movement and Balance Unit, National Hospital, London
L. C. Scott
Affiliation:
MRC Cyclotron Unit, Hammersmith Hospital; Academic Department of Psychiatry, Royal Free Hospital and School of Medicine; National Hospital for Neurology and Neurosurgery; MRC Human Movement and Balance Unit, National Hospital, London
R. S. J. Frackowiak
Affiliation:
MRC Cyclotron Unit, Hammersmith Hospital; Academic Department of Psychiatry, Royal Free Hospital and School of Medicine; National Hospital for Neurology and Neurosurgery; MRC Human Movement and Balance Unit, National Hospital, London
*
1Address for correspondence: Dr R. J. Dolan, Royal Free Hospital School of Medicine, Rowland Hill Street, London NW3 2PF

Synopsis

The relationship between neuropsychological test performance and regional cerebral blood flow (rCBF) was examined in 29 patients meeting Research Diagnostic Criteria (RDC) for major depression. Following a comprehensive neuropsychological assessment two subsets of tests, comprising tests that discriminated between patients and controls or between patients with varying degrees of global cognitive impairment, were selected. These subtests were entered into a principal components analysis (PCA) which generated a two-factor solution, accounting for 50% of the overall variance in test scores. Individual patient loadings on each of these factors were subsequently correlated with regional cerebral blood flow (rCBF), as measured by positron emission tomography (PET). Both factors demonstrated significant correlations with rCBF in the medial prefrontal cortex and frontal polar cortex while for each factor there were also unique patterns of correlations with posterior brain regions. The findings provide additional evidence that neuropsychological deficits in depression are associated with abnormalities in regional brain function and in particular with the function of the medial prefrontal cortex.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1994

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