Visual Perception

401.

Functional connectivity in the resting brain: a network analysis of the default mode hypothesis.

Functional imaging studies have shown that certain brain regions, including posterior cingulate cortex (PCC) and ventral anterior cingulate cortex (vACC), consistently show greater activity during resting states than during cognitive tasks. This finding ...
Michael D Greicius, Ben Krasnow, Allan L Reiss, Vinod Menon (Proc Natl Acad Sci U S A, 200301)
functional-connectivity-resting-brain-network-analysis-default-mode.asp

402.

The "Flash-Lag" effect occurs in audition and cross-modally.

In 1958 MacKay showed that a rigidly moving object becomes visually fragmented when part of it is continuously visible but the rest is illuminated intermittently. For example, the glowing tip of a lit cigarette moving under stroboscopic illumination ...
David Alais, David Burr (Curr Biol, 200301)
flash-lag-effect-occurs-audition-cross-modally.asp

403.

Visual perception: shaping what we see.

A new psychophysical study has examined the free flow of perception as observers viewed stimuli with several possible visual interpretations. The results suggest that our subjective impression of such ambiguous patterns may be more closely linked to the ...
David A Leopold (Curr Biol, 200301)
visual-perception-shaping-see.asp

404.

Grasp observation influences speech production.

Subjects pronounced either the syllable BA or GA while observing motor acts of hand grasp directed to objects of two sizes (experiment 1). Kinematics of lip aperture and amplitude spectrum of voice were influenced by the observation of the different ...
Maurizio Gentilucci (Eur J Neurosci, 200301)
grasp-observation-influences-speech-production.asp

405.

Utility of a dynamic termination criterion in the ZEST adaptive threshold method.

Bayesian adaptive threshold procedures may be run for a fixed number of trials, or may be stopped when the calculated confidence interval for the threshold reaches a selected limit (a dynamic termination criterion). This study used Monte-Carlo ...
Andrew J Anderson (Vision Res, 200301)
utility-dynamic-termination-criterion-zest-adaptive-threshold-method.asp

406.

Lead stimulus modality change and the attentional modulation of the acoustic and electrical blink reflex.

Two experiments investigated the effects of the sensory modality of the lead and of the blink-eliciting stimulus during lead stimulus modality change on blink modulation at lead intervals of 2500 and 3500 ms. Participants were presented with acoustic, ...
Ottmar V Lipp, David L Neumann, Meredith J McHugh (Biol Psychol, 200301)
lead-stimulus-modality-change-attentional-modulation-acoustic.asp

407.

Emotional facilitation of sensory processing in the visual cortex.

A key function of emotion is the preparation for action. However, organization of successful behavioral strategies depends on efficient stimulus encoding. The present study tested the hypothesis that perceptual encoding in the visual cortex is modulated ...
Harald T Schupp, Markus Junghöfer, Almut I Weike, Alfons O Hamm (Psychol Sci, 200301)
emotional-facilitation-sensory-processing-visual-cortex.asp

408.

Civilian use of night vision goggles.

Civil aviation operators have expressed an increased interest in conducting night operations with night vision imaging systems. The development of special operational concepts, hardware requirements, training requirements, and regulatory change and ...
Guillermo Salazar, Leonard Temme, J Charles Antonio (Aviat Space Environ Med, 200301)
civilian-night-vision-goggles.asp

409.

Task-related power and coherence changes in neuromagnetic activity during visuomotor coordination.

We analyzed a set of full-head (66 channels, CTF Inc.) magnetoencephalography (MEG) data recorded when 5 subjects performed rhythmic right index-finger flexion and extension movements on the beat (synchronization) or off the beat (syncopation) with a ...
Yanqing Chen, Mingzhou Ding, J A Scott Kelso (Exp Brain Res, 200301)
task-related-power-coherence-changes-neuromagnetic-activity.asp

410.

Developmental changes in the processing of hierarchical shapes continue into adolescence.

The present study was designed to trace the normal development of local and global processing of hierarchical visual forms. We presented pairs of hierarchical shapes to children and adults and asked them to indicate whether the two shapes were the same ...
Catherine J Mondloch, Sybil Geldart, Daphne Maurer, Scania de Schonen (J Exp Child Psychol, 200301)
developmental-changes-processing-hierarchical-shapes-continue.asp