Search Results - "Fletcher, P. C"

Frontal lobes and human memory : Insights from functional neuroimaging by FLETCHER, P. C, HENSON, R. N. A

“…The new functional neuroimaging techniques, PET and functional MRI (fMRI), offer sufficient experimental flexibility and spatial resolution to explore the…”
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Precision weighting of cortical unsigned prediction error signals benefits learning, is mediated by dopamine, and is impaired in psychosis by Haarsma, J., Fletcher, P. C., Griffin, J. D., Taverne, H. J., Ziauddeen, H., Spencer, T. J., Miller, C., Katthagen, T., Goodyer, I., Diederen, K. M. J., Murray, G. K.

“…Recent theories of cortical function construe the brain as performing hierarchical Bayesian inference. According to these theories, the precision of prediction…”
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Substantia nigra ventral tegmental reward prediction error disruption in psychosis by Murray, G K, Corlett, P R, Clark, L, Pessiglione, M, Blackwell, A D, Honey, G, Jones, P B, Bullmore, E T, Robbins, T W, Fletcher, P C

“…While dopamine systems have been implicated in the pathophysiology of schizophrenia and psychosis for many years, how dopamine dysfunction generates psychotic…”
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Sense of agency in health and disease: A review of cue integration approaches by Moore, J.W., Fletcher, P.C.

“…► Established models of sense of agency (SoA) may be inadequate. ► We consider the relevance to SoA of a novel Bayesian cue integration framework. ► The value…”
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Exploring implicit and explicit aspects of sense of agency by Moore, J.W., Middleton, D., Haggard, P., Fletcher, P.C.

“…► A distinction between implicit and explicit aspects of agency has been proposed. ► The validity of this distinction is unclear. ► We tested whether these…”
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Disrupted prediction-error signal in psychosis: evidence for an associative account of delusions by Corlett, P.R., Murray, G.K., Honey, G.D., Aitken, M.R.F., Shanks, D.R., Robbins, T.W., Bullmore, E.T., Dickinson, A., Fletcher, P.C.

“…Delusions are maladaptive beliefs about the world. Based upon experimental evidence that prediction error—a mismatch between expectancy and outcome—drives…”
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Correction: Precision weighting of cortical unsigned prediction error signals benefits learning, is mediated by dopamine, and is impaired in psychosis by Haarsma, J., Fletcher, P. C., Griffin, J. D., Taverne, H. J., Ziauddeen, H., Spencer, T. J., Miller, C., Katthagen, T., Goodyer, I., Diederen, K. M. J., Murray, G. K.

“…An amendment to this paper has been published and can be accessed via a link at the top of the paper…”
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Effects of the mu-opioid receptor antagonist GSK1521498 on hedonic and consummatory eating behaviour: a proof of mechanism study in binge-eating obese subjects by Ziauddeen, H, Chamberlain, S R, Nathan, P J, Koch, A, Maltby, K, Bush, M, Tao, W X, Napolitano, A, Skeggs, A L, Brooke, A C, Cheke, L, Clayton, N S, Sadaf Farooqi, I, O'Rahilly, S, Waterworth, D, Song, K, Hosking, L, Richards, D B, Fletcher, P C, Bullmore, E T

“…The opioid system is implicated in the hedonic and motivational processing of food, and in binge eating, a behaviour strongly linked to obesity. The aim of…”
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Reading the mind in cartoons and stories: an fMRI study of ‘theory of mind’ in verbal and nonverbal tasks by Gallagher, H.L, Happé, F, Brunswick, N, Fletcher, P.C, Frith, U, Frith, C.D

“…Previous functional imaging studies have explored the brain regions activated by tasks requiring ‘theory of mind’—the attribution of mental states. Tasks used…”
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Multiple markers of cortical morphology reveal evidence of supragranular thinning in schizophrenia by Wagstyl, K, Ronan, L, Whitaker, K J, Goodyer, I M, Roberts, N, Crow, T J, Fletcher, P C

“…In vivo structural neuroimaging can reliably identify changes to cortical morphology and its regional variation but cannot yet relate these changes to specific…”
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Abnormal frontal activations related to decision-making in current and former amphetamine and opiate dependent individuals by Ersche, K D, Fletcher, P C, Lewis, S J G, Clark, L, Stocks-Gee, G, London, M, Deakin, J B, Robbins, T W, Sahakian, B J

“…There is converging evidence for impairments in decision-making in chronic substance users. In the light of findings that substance abuse is associated with…”
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Is food addiction a valid and useful concept? by Ziauddeen, H., Fletcher, P. C.

“…Summary In this paper, we consider the concept of food addiction from a clinical and neuroscientific perspective. Food addiction has an established and growing…”
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Novel insights into maladaptive behaviours in Prader-Willi syndrome: serendipitous findings from an open trial of vagus nerve stimulation by Manning, K. E., McAllister, C. J., Ring, H. A., Finer, N., Kelly, C. L., Sylvester, K. P., Fletcher, P. C., Morrell, N. W., Garnett, M. R., Manford, M. R. A., Holland, A. J.

“…Background We report striking and unanticipated improvements in maladaptive behaviours in Prader–Willi syndrome (PWS) during a trial of vagus nerve stimulation…”
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Psychological effects of ketamine in healthy volunteers: Phenomenological study by Pomarol-Clotet, E, Honey, G. D, Murray, G. K, Corlett, P. R, Absalom, A. R, Lee, M, McKenna, P. J, Bullmore, E. T, Fletcher, P. C

“…The psychosis-inducing effect of ketamine is important evidence supporting the glutamate hypothesis of schizophrenia. However, the symptoms the drug produces…”
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Dissociating prefrontal and hippocampal function in episodic memory encoding by Dolan, R. J, Fletcher, P. C

“…Human lesion data indicate that an intact left hippocampal formation is necessary for auditory-verbal memory. By contrast, functional neuroimaging has…”
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The functional roles of prefrontal cortex in episodic memory. I. Encoding by FLETCHER, P. C, SHALLICE, T, DOLAN, R. J

“…Functional neuroimaging studies of episodic memory consistently report an association between memory encoding operations and left prefrontal cortex (PFC)…”
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Responses of human frontal cortex to surprising events are predicted by formal associative learning theory by Fletcher, P. C, Anderson, J. M, Shanks, D. R, Honey, R, Carpenter, T. A, Donovan, T, Papadakis, N, Bullmore, E. T

“…Learning depends on surprise and is not engendered by predictable occurrences. In this functional magnetic resonance imaging (fMRI) study of causal associative…”
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Inhibition of subliminally primed responses is mediated by the caudate and thalamus: evidence from functional MRI and Huntington’s disease by Aron, A. R., Schlaghecken, F., Fletcher, P. C., Bullmore, E. T., Eimer, M., Barker, R., Sahakian, B. J., Robbins, T. W.

“…Masked prime tasks have shown that sensory information that has not been consciously perceived can nevertheless trigger the preactivation of a motor response…”
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Discriminative and Evaluative Properties of the Activities-specific Balance Confidence (ABC) Scale by Myers, Anita M., Fletcher, Paula C., Myers, Ann H., Sherk, Wendy

“…Background. Balance confidence is an important indicator of functional mobility and independence in older adults. Preliminary psychometric evidence for the…”
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Food images engage subliminal motivation to seek food by Ziauddeen, H, Subramaniam, N, Gaillard, R, Burke, L K, Farooqi, I S, Fletcher, P C

“…Human eating behaviour is motivated and shaped by a complex interaction of internal drives such as hunger, external influences such as environmental cues and…”
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