Conflict monitoring versus selection-for-action in anterior cingulate cortex

Article Abstract:

It has been possible to identify new evidence supporting the conflict-monitoring explanation of anterior cingulate cortex (ACC) function. It was found that activity within the ACC was greater during trials with high levels of conflict (and weak selection-for-action) than during trials with low levels of conflict (and strong selection-for-action). Across subjects, there were strong links between the strength of ACC activation and the severity of conflict. These findings challenge the widely accepted view of ACC function, but do not exclude an influence of the ACC on selection-for-action.

Localization (Brain function)

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Spatial working memory in humans as revealed by PET

Article Abstract:

Positron emission topography (PET) scans of subjects engaged in short-term memory tests indicate that right-hemisphere prefrontal, occipital, parietal and premotor cortices are linked to temporary spatial memory. Prior tests have used monkeys or brain-injured humans; no prior ones used healthy humans. The prefrontal cortex was thought to be involved in such memory, but its role is undetermined: it may record spatial location, or index the memory elsewhere.

Physiological aspects, PET imaging, Positron emission tomography

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Temporal dynamics of brain activation during a working memory task

Article Abstract:

Scientific research indicates the dorsolateral region of the prefrontal cortex in a non-human brain participates in the active maintenance of working memory. Functional magnetic resonance imaging has been used to illustrate temporal brain patterns in human subjects actively engaged in a working memory task. This research shows the prefrontal and parietal cortices are both involved in the active maintenance process.

Research, Analysis, Brain research, Magnetic resonance imaging, Cerebral cortex

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