Reaction Time

231.

Motor planning: effect of directional uncertainty with discrete spatial cues.

We investigated the effect of spatial uncertainty on motor planning by using the cueing method in a reaching task (experiment 1). Discrete spatial cues indicated the different locations in which the target could be presented. The number of cues as well ...
Giuseppe Pellizzer, James H Hedges (Exp Brain Res, 200306)
motor-planning-effect-directional-uncertainty-discrete-spatial-cues.asp

232.

Inhibition of return and the human frontal eye fields.

Inhibition of return (IOR) is a bias against reorienting attention to a previously cued location. In this study, using single-pulse transcranial magnetic stimulation (TMS), we show that the human frontal eye fields (FEF) play a crucial role in the ...
Tony Ro, Alessandro Farnè, Erik Chang (Exp Brain Res, 200306)
inhibition-return-human-frontal-eye-fields.asp

233.

Excessive daytime sleepiness and levodopa in Parkinsons disease: polygraphic, placebo-controlled monitoring.

The authors performed 72-hour polysomnography, including a levodopa-placebo-controlled choice reaction time test with continuous monitoring of cardiovascular variables in two patients with Parkinsons disease complaining of excessive daytime sleepiness on ...
Manuela Contin, Federica Provini, Paolo Martinelli, Roberto Riva, Fiorenzo Albani, Roberto Vetrugno, Caterina Lombardi, Pasquale Montagna, Agostino Baruzzi (Clin Neuropharmacol, 200305-06)
excessive-daytime-sleepiness-levodopa-parkinson-s-disease-polygraphic.asp

234.

Simulations of voltage clamping poorly space-clamped voltage-dependent conductances in a uniform cylindrical neurite.

Significant error is made by using a point voltage clamp to measure active ionic current properties in poorly space-clamped cells. This can even occur when there are no obvious signs of poor spatial control. We evaluated this error for experiments that ...
Daniel K Hartline, Ann M Castelfranco (J Comput Neurosci, 200305-06)
simulations-voltage-clamping-poorly-space-clamped-voltage-dependent.asp

235.

Does phonological encoding in speech production always follow the retrieval of semantic knowledge? Electrophysiological evidence for parallel processing.

In this article a new approach to the distinction between serial/contingent and parallel/independent processing in the human cognitive system is applied to semantic knowledge retrieval and phonological encoding of the word form in picture naming. In ...
Rasha Abdel Rahman, Werner Sommer (Brain Res Cogn Brain Res, 200305)
phonological-encoding-speech-production-follow-retrieval-semantic.asp

236.

Misoprostol versus oxytocin for labor induction in term and post-term pregnancy: randomized controlled trial.

CONTEXT: Misoprostol, a synthetic E1 methyl analog prostaglandin, is at present receiving attention as a cervical modifier and labor induction agent. However, there is still a need for better determination of its safety and effectiveness. OBJECTIVE: To ...
Márcia Maria Auxiliadora de Aquino, José Guilherme Cecatti (Sao Paulo Med J, 200305)
misoprostol-versus-oxytocin-labor-induction-term-post-term-pregnancy.asp

237.

The electrophysiological net response (F-complex) to spatial fusion of speech elements forming an auditory object.

OBJECTIVE: The purpose of this study was to define and analyze the brain activity associated with fusion of speech elements to form an auditory object and to study the effects of presenting the elements at different spatial locations (duplex stimulus). ...
Ilan Laufer, Hillel Pratt (Clin Neurophysiol, 200305)
electrophysiological-net-response-f-complex-spatial-fusion-speech.asp

238.

Audition of laughing and crying leads to right amygdala activation in a low-noise fMRI setting.

Adequate behavioral responses to socially relevant stimuli are often impaired after lesions of the amygdala. These impaired behavioral responses in particular concern the recognition of facial, and sometimes vocal, expressions of fear. Using low-noise ...
Kerstin Sander, André Brechmann, Henning Scheich (Brain Res Brain Res Protoc, 200305)
audition-laughing-crying-leads-right-amygdala-activation-low-noise.asp

239.

Functional dissociation among components of remembering: control, perceived oldness, and content.

Remembering is the ability to bring back to mind episodes from ones past and is presumably accomplished by multiple, interdependent processes. In the present functional magnetic resonance imaging study, neural correlates of three hypothesized components ...
Mark E Wheeler, Randy L Buckner (J Neurosci, 200305)
functional-dissociation-components-remembering-control-perceived.asp

240.

Effects of unilateral pallidotomy on voluntary movement, and simple and choice reaction times in Parkinsons disease.

We studied the effects of unilateral pallidotomy on motor execution and reaction times in patients with moderately advanced Parkinsons disease (PD). Twelve consecutive patients (7 men, 5 women; all right-handed) underwent left-side microelectrode-guided ...
Ryoichi Hayashi, Takao Hashimoto, Tsuyoshi Tada, Shu-ichi Ikeda (Mov Disord, 200305)
effects-unilateral-pallidotomy-voluntary-movement-simple-choice.asp