R
Robin G. Morris
Researcher at Georgia State University
Publications - 544
Citations - 34718
Robin G. Morris is an academic researcher from Georgia State University. The author has contributed to research in topics: Dementia & Cognition. The author has an hindex of 98, co-authored 519 publications receiving 32080 citations. Previous affiliations of Robin G. Morris include Florida State University College of Arts and Sciences & University College London.
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Journal ArticleDOI
Evidence for cortical “disconnection” as a mechanism of age-related cognitive decline
Michael O'Sullivan,Derek K. Jones,Paul Summers,Robin G. Morris,Steven Williams,Hugh S. Markus +5 more
TL;DR: Findings provide direct evidence that white matter tract disruption occurs in normal aging and would be consistent with the cortical disconnection hypothesis of age-related cognitive decline and provide a plausible structural basis for selective loss of executive functions.
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Changes in emotion after circumscribed surgical lesions of the orbitofrontal and cingulate cortices
J. Hornak,Jessica Bramham,Edmund T. Rolls,Robin G. Morris,John P. O'Doherty,Peter R. Bullock,C. E. Polkey +6 more
TL;DR: Findings with surgically circumscribed lesions show that within the prefrontal cortex, both the OFC and the ACC/medial BA 9 region are involved in a number of aspects of emotion in humans including emotion identification, social behaviour and subjective emotional state, and that the dorsolateral prefrontal areas are not involved in emotion in these ways.
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A comparative study of visuospatial memory and learning in alzheimer-type dementia and parkinson's disease
Barbara J. Sahakian,Robin G. Morris,J. L. Evenden,Andrew Heald,Raymond Levy,Michael Philpot,Trevor W. Robbins +6 more
TL;DR: The utility of the comparison between DAT and PD in characterizing the nature of the cognitive deficits in these conditions and their relation to those findings from animal neuropsychology which use comparable paradigms are discussed.
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Reward-related Reversal Learning after Surgical Excisions in Orbito-frontal or Dorsolateral Prefrontal Cortex in Humans
J. Hornak,John P. O'Doherty,Jessica Bramham,Edmund T. Rolls,Robin G. Morris,Peter R. Bullock,C. E. Polkey +6 more
TL;DR: The results show that the orbital prefrontal cortex is required bilaterally for monitoring changes in the reward value of stimuli and using this to guide behavior in the task; whereas the dorsolateral prefrontal cortex, if it produces deficits in thetask, does so for reasons related to executive functions, such as the control of attention.
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Impaired extra-dimensional shift performance in medicated and unmedicated Parkinson's disease: Evidence for a specific attentional dysfunction
J J Downes,Angela C. Roberts,Barbara J. Sahakian,J. L. Evenden,Robin G. Morris,Trevor W. Robbins +5 more
TL;DR: The results of the first experiment showed a selective deficit in both groups of Parkinsonian subjects in their ability to perform an extra-dimensional shift and in the visual search task, the patients were less accurate, but responded with equivalent choice reaction times to those of controls.