Zobrazeno 1 - 10
of 786
pro vyhledávání: '"Kj, Friston"'
Publikováno v:
Europe PubMed Central
In this paper we present a general multivariate approach to the analysis of functional imaging studies. This analysis uses standard multivariate techniques to make statistical inferences about activation effects and to describe the important features
Publikováno v:
Europe PubMed Central
This work represents an attempt to bring together two important themes in neuronal dynamics. The first is the characterization of dynamic correlations in multiunit recordings of spike activity using joint-peri-stimulus time histograms (J-PSTHs) [Aert
Publikováno v:
Europe PubMed Central
The neurobiological mechanisms of opiate addictive behaviour in humans are unknown. A proposed model of addiction implicates ascending brainstem neuromodulatory systems, particularly dopamine. Using functional neuroimaging, we assessed the neural res
Publikováno v:
Europe PubMed Central
PET activation studies are performed widely to study human brain function. The question of reproducibility, reliability, and comparability of the results of such experiments has never been addressed on a large scale. Recently, 12 European PET centers
Autor:
Paulesu E, Connelly A, Cd, Frith, Kj, Friston, Heather J, Myers R, Dg, Gadian, Richard Frackowiak
Publikováno v:
Europe PubMed Central
The most established functional MR imaging technique for activation studies relies on a T2*-weighted contrast. This signal arises primarily from a blood oxygen level dependent contrast generated by an imbalance between the increase in regional cerebr
Publikováno v:
Europe PubMed Central
Current approaches to detecting significantly activated regions of cerebral tissue use statistical parametric maps, which are thresholded to render the probability of one or more activated regions of one voxel, or larger, suitably small (e. g., 0.05)
Publikováno v:
NeuroImage. 47:S167
Publikováno v:
NeuroImage. 47:S167
Autor:
Kj, Friston, Pm, Grasby, Cd, Frith, Cj, Bench, Rj, Dolan, Pj, Cowen, Pf, Liddle, Richard Frackowiak
Publikováno v:
Europe PubMed Central
The neuromodulatory effect of manipulating monoaminergic receptor function was assessed by combining a psychological and a pharmacological activation during repeated positron emission tomographic (PET) scans. The effects of buspirone (a 5-HT1A recept