Reaction Time

561.

Interaction between naltrexone and oral THC in heavy marijuana smokers.

RATIONALE: Studies in non-human animals suggest that opioid antagonists block the reinforcing effects of cannabinoids. OBJECTIVE: The present studies in humans investigated how naltrexone modulates (1) the subjective and physiological effects of oral THC ...
Margaret Haney, Adam Bisaga, Richard W Foltin (Psychopharmacology (Berl), 200302)
interaction-naltrexone-oral-thc-heavy-marijuana-smokers.asp

562.

The shape of holes.

The shape of holes can be recognized as accurately as the shape of objects (Palmer, S. E. (1999). Vision science: photons to phenomenology. Cambridge, MA: MIT Press), yet the area enclosed by a hole is a background region, and it can be demonstrated that ...
Marco Bertamini, Camilla J Croucher (Cognition, 200302)
shape-holes.asp

563.

Abrupt onsets and gaze direction cues trigger independent reflexive attentional effects.

The present study investigated whether the direction of visual signals is influenced independently by two automatic visual orienting phenomena: orienting to a gazed-at location and inhibition of return (IOR) to the location of an abrupt onset. A ...
Chris Kelland Friesen, Alan Kingstone (Cognition, 200302)
abrupt-onsets-gaze-direction-cues-trigger-independent-reflexive.asp

564.

Activation of NR1/NR2B NMDA receptors.

N-methyl-D-aspartate (NMDA) receptors are highly expressed in the central nervous system and are involved in excitatory synaptic transmission as well as synaptic plasticity. Despite considerable structural and biophysical research, the mechanism behind ...
Tue G Banke, Stephen F Traynelis (Nat Neurosci, 200302)
activation-nr-nr-b-nmda-receptors.asp

565.

Horse-race model simulations of the stop-signal procedure.

In the stop-signal paradigm, subjects perform a standard two-choice reaction task in which, occasionally and unpredictably, a stop-signal is presented requiring the inhibition of the response to the choice signal. The stop-signal paradigm has been ...
Guido P H Band, Maurits W van der Molen, Gordon D Logan (Acta Psychol (Amst), 200302)
horse-race-model-simulations-stop-signal-procedure.asp

566.

Effects of olanzapine on auditory P300 in schizophrenia.

Reduced auditory P300 amplitude generally has been considered to be a trait marker of schizophrenia, independent of antipsychotic treatment and clinical symptoms. However, several seemingly well-conducted studies have found P300 amplitude to be a state ...
Ali Saffet Gonul, Cem Suer, Kerry Coburn, Cigdem Ozesmi, Aslan Oguz, Alpaslan Yilmaz (Prog Neuropsychopharmacol Biol Psychiatry, 200302)
effects-olanzapine-auditory-p-schizophrenia.asp

567.

On spatial response code activation in a Simon task.

The Simon effect refers to the performance advantage for trials where the task-irrelevant location of a target spatially corresponds with the location of the response. It is thought that the irrelevant spatial code of the target facilitates responding by ...
Jason Ivanoff (Acta Psychol (Amst), 200302)
spatial-response-code-activation-simon-task.asp

568.

Event-related potentials evoked by multi-feature conflict under different attentive conditions.

Event-related potentials (ERPs) were recorded in subjects while they were performing a matching task. The focus of the present study was on the contributions made by ERP recording to revealing the time-course of multi-conflict information processing in ...
Yuping Wang, Shujuan Tian, Huijun Wang, Lili Cui, Yuanyuan Zhang, Xi Zhang (Exp Brain Res, 200302)
event-related-potentials-evoked-multi-feature-conflict-under.asp

569.

Reflex connections from forearm and hand afferents to shoulder girdle muscles in humans.

Using surface electromyographic recordings from the trapezius and serratus anterior muscles and percutaneous electrical stimulation of the median, ulnar and radial nerves, the reflex connections from forearm and hand afferents to these shoulder girdle ...
C M Alexander, P J Harrison (Exp Brain Res, 200302)
reflex-connections-forearm-hand-afferents-shoulder-girdle-muscles.asp

570.

Object-based representations facilitate memory for inhibitory processes.

Previous work has shown that in a sequential cueing task, inhibition of the return of attention (IOR) can be observed for up to four or five loci. We have argued that the inhibition processes mediating IOR are associated with object-based ...
Matthew A Paul, Steven P Tipper (Exp Brain Res, 200302)
object-based-representations-facilitate-memory-inhibitory-processes.asp