Memory, Short-Term

21.

Altered effective connectivity during working memory performance in schizophrenia: a study with fMRI and structural equation modeling.

The present study aimed to explore altered effective connectivity in schizophrenic patients while performing a 2-back working memory task. Twelve right-handed, schizophrenic patients treated with typical or atypical antipsychotics and 6 healthy control ...
Ralf Schlösser, Thomas Gesierich, Bettina Kaufmann, Goran Vucurevic, Stefan Hunsche, Joachim Gawehn, Peter Stoeter (Neuroimage, 200307)
altered-effective-connectivity-working-memory-performance.asp

22.

Effects of working memory demands on frontal slow waves in time-interval reproduction tasks in humans.

Very few studies have examined the event-related potentials associated with the retention of temporal information for later use. In the present experiment, event-related potentials were recorded during two duration reproduction tasks in which a delay was ...
Vincent Monfort, Viviane Pouthas (Neurosci Lett, 200306)
effects-working-memory-demands-frontal-slow-waves-time-interval.asp

23.

Neurocognitive effects of repetitive transcranial magnetic stimulation in severe major depression.

OBJECTIVE: Repetitive transcranial magnetic stimulation (rTMS) is being investigated as a potential treatment for depression. Few studies have addressed the neurocognitive effects of a course of rTMS in severely depressed patients. We evaluated ...
Brian Martis, Danesh Alam, Sheila M Dowd, S Kristian Hill, Rajiv P Sharma, Cherise Rosen, Neil Pliskin, Eileen Martin, Valorie Carson, Philip G Janicak (Clin Neurophysiol, 200306)
neurocognitive-effects-repetitive-transcranial-magnetic-stimulation.asp

24.

Brain regions involved in simple and complex grammatical transformations.

Grammatical transformation is a verbal reasoning task requiring judging the veracity of statements describing the spatial order of letter sets. We studied 18 adults with FMRI while they performed grammatical transformations of varying complexity levels ...
Sean P A Drummond, Gregory G Brown, Jennifer S Salamat (Neuroreport, 200306)
brain-regions-involved-simple-complex-grammatical-transformations.asp

25.

Self-organizing neural integrator predicts interval times through climbing activity.

Mammals can reliably predict the time of occurrence of an expected event after a predictive stimulus. Climbing activity is a prominent profile of neural activity observed in prefrontal cortex and other brain areas that is related to the anticipation of ...
Daniel Durstewitz (J Neurosci, 200306)
self-organizing-neural-integrator-predicts-interval-times-climbing.asp

26.

Effects of directions to remember or to forget on the short-term recognition memory of simultaneously presented words.

An initial study suggested that directions to forget actually resulted in better remembering in a short-term word-recognition memory task. Four follow-up studies showed no statistically significant evidence that directions to forget caused either ...
Richard S Cimbalo, Kathleen M Measer, Kimberly A Ferriter (Psychol Rep, 200306)
effects-directions-remember-or-forget-short-term-recognition-memory.asp

27.

Cerebral networks linked to the event-related potential P300.

P300 is an event-related potential that is elicited by an oddball paradigm. In several neuropsychiatric diseases, differences in latencies and amplitude compared to healthy subjects have been reported. Because of its clinical significance, several ...
Helge Horn, Nadeem Syed, Heinrich Lanfermann, Konrad Maurer, Thomas Dierks (Eur Arch Psychiatry Clin Neurosci, 200306)
cerebral-networks-linked-event-related-potential-p.asp

28.

Does excessive memory load attenuate activation in the prefrontal cortex? Load-dependent processing in single and dual tasks: functional magnetic resonance imaging study.

Functional magnetic resonance imaging was used to investigate the relationship between cortical activation and memory load in dual tasks. An n-back task at four levels of difficulty was used with auditory-verbal and visual-nonverbal material, performed ...
Susanne M Jaeggi, Ria Seewer, Arto C Nirkko, Doris Eckstein, Gerhard Schroth, Rudolf Groner, Klemens Gutbrod (Neuroimage, 200306)
excessive-memory-load-attenuate-activation-prefrontal-cortex-load.asp

29.

Spatial working memory activity of the caudate nucleus is sensitive to frame of reference.

We used event-related fMRI to test the hypothesis that the caudate nucleus is preferentially recruited by a spatial working memory task employing egocentrically defined stimuli, which are amenable to transformation into a motor code, as contrasted with ...
Bradley R Postle, Mark DEsposito (Cogn Affect Behav Neurosci, 200306)
spatial-working-memory-activity-caudate-nucleus-sensitive-frame.asp

30.

Robust spatial working memory through homeostatic synaptic scaling in heterogeneous cortical networks.

The concept of bell-shaped persistent neural activity represents a cornerstone of the theory for the internal representation of analog quantities, such as spatial location or head direction. Previous models, however, relied on the unrealistic assumption ...
Alfonso Renart, Pengcheng Song, Xiao-Jing Wang (Neuron, 200305)
robust-spatial-working-memory-homeostatic-synaptic-scaling.asp