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Placebo-Induced Changes in fMRI in the Anticipation and Experience of Pain
fMRI experiments found that placebo analgesia was related to decreased brain activity in pain-sensitive brain regions, including the thalamus, insula, and anterior cingulate cortex, and was associated with increased activity during anticipation of pain in the prefrontal cortex, providing evidence that placebos alter the experience of pain.
Temporal dynamics of brain activation during a working memory task
Functional magnetic resonance imaging is used to examine brain activation in human subjects during performance of a working memory task and to show that prefrontal cortex along with parietal cortex appears to play a role in active maintenance.
A Parametric Study of Prefrontal Cortex Involvement in Human Working Memory
- T. Braver, Jonathan D. Cohen, L. Nystrom, J. Jonides, Edward E. Smith, D. Noll
- Psychology, BiologyNeuroImage
- 1 June 1996
Functional magnetic resonance imaging is used to probe PFC activity during a sequential letter task in which memory load was varied in an incremental fashion, providing a "dose-response curve" describing the involvement of both PFC and related brain regions in WM function.
Age Differences in the Frontal Lateralization of Verbal and Spatial Working Memory Revealed by PET
Positron emission tomography was used to investigate verbal and spatial short-term storage in older and younger adults to consider several mechanisms that could account for these age differences including the possibility that bilateral activation reflects recruitment to compensate for neural decline.
Verbal Working Memory Load Affects Regional Brain Activation as Measured by PET
The data support a model of working memory that includes both storage and executive processes that recruit a network of brain areas, all of which are involved in task performance.
Working Memory: A View from Neuroimaging
The results provide support for certain cognitive models of working memory and also suggest some distinctions that these models have not emphasized.
Neuroimaging studies of working memory:
- T. Wager, Edward E. Smith
- Psychology, BiologyCognitive, affective & behavioral neuroscience
- 1 December 2003
A potential fourth executive function is considered: selective attention to features of a stimulus to be stored in WM which leads to increased probability of activating the medial prefrontal cortex (BA 32) in storage tasks.
Spatial working memory in humans as revealed by PET
- J. Jonides, Edward E. Smith, R. Koeppe, E. Awh, S. Minoshima, M. Mintun
- Biology, PsychologyNature
- 17 June 1993
P positron emission tomography studies of regional cerebral blood flow in normal humans that reveal activation in right-hemisphere prefrontal, occipital, parietal and premotor cortices accompanying spatial working memory processes begin to uncover the circuitry of a working memory system in humans.
Dissociation of Storage and Rehearsal in Verbal Working Memory: Evidence From Positron Emission Tomography
Current cognitive models of verbal working memory include two components a phonological store and a rehearsal mechanism that refreshes the contents of this store We present research using positron…
An argument is categorical if its premises and conclusion are of the form All members ofC have property F, where C is a natural category like FALCON or BIRD, and P remains the same across premises…