Memory, Short-Term

31.

Steady-state visual evoked potentials reveal frontally-mediated working memory activity in humans.

Steady-state visual evoked potentials (SSVEPs) reflect power changes at the stimulus driving frequency and have been used to assess brain activity reflecting cognitive processing. Only one study has demonstrated SSVEP modulation associated with working ...
William M Perlstein, Michael A Cole, Michael Larson, Kiesa Kelly, Paul Seignourel, Andreas Keil (Neurosci Lett, 200305)
steady-state-visual-evoked-potentials-reveal-frontally-mediated.asp

32.

Cerebral activation in abstinent ecstasy (MDMA) users during a working memory task: a functional magnetic resonance imaging (fMRI) study.

The popular recreational drug ecstasy (3,4-methylenedioxymethamphetamine=MDMA and related congeners) is neurotoxic upon central serotonergic systems in animal studies. So far, the most convincing evidence for neurotoxicity-related functional deficits in ...
Jörg Daumann, Bruno Fimm, Klaus Willmes, Armin Thron, Euphrosyne Gouzoulis-Mayfrank (Brain Res Cogn Brain Res, 200305)
cerebral-activation-abstinent-ecstasy-mdma-users-working-memory-task.asp

33.

Mechanisms underlying interlimb transfer of visuomotor rotations.

We previously reported that opposite arm training improved the initial direction of dominant arm movements, whereas it only improved the final position accuracy of non-dominant arm movements. We now ask whether each controller accesses common, or ...
Jinsung Wang, Robert L Sainburg (Exp Brain Res, 200304)
mechanisms-underlying-interlimb-transfer-visuomotor-rotations.asp

34.

A parametric manipulation of factors affecting task-induced deactivation in functional neuroimaging.

Task-induced deactivation (TID) refers to a regional decrease in blood flow during an active task relative to a "resting" or "passive" baseline. We tested the hypothesis that TID results from a reallocation of processing resources by parametrically ...
Kristen A McKiernan, Jacqueline N Kaufman, Jane Kucera-Thompson, Jeffrey R Binder (J Cogn Neurosci, 200304)
parametric-manipulation-factors-affecting-task-induced-deactivation.asp

35.

Basic mechanisms for graded persistent activity: discrete attractors, continuous attractors, and dynamic representations.

Persistent neural activity is observed in many systems, and is thought to be a neural substrate for holding memories over time delays of a few seconds. Recent work has addressed two issues. First, how can networks of neurons robustly hold such an active ...
Carlos D Brody, Ranulfo Romo, Adam Kepecs (Curr Opin Neurobiol, 200304)
basic-mechanisms-graded-persistent-activity-discrete-attractors.asp

36.

Working memory in mild Alzheimers disease and early Parkinsons disease.

Alzheimers disease (AD) and Parkinsons disease (PD) impair working memory (WM). It is unclear, however, whether the deficits seen early in the course of these diseases are similar. To address this issue, the authors compared the performance of 22 ...
Elizabeth A Kensinger, Deirdre K Shearer, Joseph J Locascio, John H Growdon, Suzanne Corkin (Neuropsychology, 200304)
working-memory-mild-alzheimer-s-disease-early-parkinson-s-disease.asp

37.

Psychophysiological correlates in male to female transsexuals studied with a P300 investigation.

BACKGROUND: Transsexualism is thought to be related to cortical processes reflecting a complex mosaic of biological, psychological and social/cultural information. Since the P300 component of event-related potentials is considered as an index of ...
C Papageorgiou, P Papageorgaki, G Tolis, A D Rabavilas, G N Christodoulou (Psychol Med, 200304)
psychophysiological-correlates-male-female-transsexuals-studied-p-.asp

38.

Topology and graph theory applied to cortical anatomy may help explain working memory capacity for three or four simultaneous items.

Cognitive experimentation suggests that at any single instant only three or four items ("chunks") are simultaneously prominent as a working memory (WM) trace, if we disregard the rehearsal component of WM. The reason for small WM capacity may concern ...
Robert B Glassman (Brain Res Bull, 200304)
topology-graph-theory-applied-cortical-anatomy-help-explain-working.asp

39.

Calculation impairment in neurodegenerative diseases.

We examined oral calculation in patients with corticobasal degeneration (CBD; N=17), frontotemporal dementia (FTD; N=17), and Alzheimers disease (AD; N=20), as well as 17 healthy seniors matched for age and education. Our calculation model involves at ...
Casey Halpern, Corey McMillan, Peachie Moore, Kari Dennis, Murray Grossman (J Neurol Sci, 200304)
calculation-impairment-neurodegenerative-diseases.asp

40.

Prefrontal cortex dysfunction during working memory performance in schizophrenia: reconciling discrepant findings.

Working memory (WM) deficits are a persistent, disabling and relatively treatment-resistant feature of schizophrenia that may underlie many cognitive deficits and symptoms. They are associated with prefrontal cortex dysfunction. While most neuroimaging ...
Dara S Manoach (Schizophr Res, 200304)
prefrontal-cortex-dysfunction-working-memory-performance.asp