Visual Perception

231.

Familial handedness and spatial ability: a study with Chinese students aged 14-24.

This study tested Annetts right-shift theory on spatial ability with two samples from China. The Vandenberg Mental Rotation Test (MRT), Edinburgh Handedness Inventory, and Family Handedness Questionnaire were administered to 266 high school students and ...
Chieh Li, Wenbin Zhu, Ronald L Nuttall (Brain Cogn, 200304)
familial-handedness-spatial-ability-study-chinese-students-aged.asp

232.

Parietal lobe contribution to mental rotation demonstrated with rTMS.

A large number of imaging studies have identified a role for the posterior parietal lobe, in particular Brodmanns area 7 and the intraparietal sulcus (IPS), in mental rotation. Here we investigated whether neural activity in the posterior parietal lobe ...
Irina M Harris, Carlo Miniussi (J Cogn Neurosci, 200304)
parietal-lobe-contribution-mental-rotation-demonstrated-rtms.asp

233.

A magnetic stimulation examination of orthographic neighborhood effects in visual word recognition.

The split-fovea theory proposes that visual word recognition is mediated by the splitting of the foveal image, with letters to the left of fixation projected to the right hemisphere (RH) and letters to the right of fixation projected to the left ...
Michal Lavidor, Vincent Walsh (J Cogn Neurosci, 200304)
magnetic-stimulation-examination-orthographic-neighborhood-effects.asp

234.

Comparison of fMRI activation at 3 and 1.5 T during perceptual, cognitive, and affective processing.

Previous studies comparing fMRI data acquired at 1.5 T and higher field strengths have focused on examining signal increases in the visual and motor cortices. No information is, however, available on the relative gain, or the comparability of data, ...
B Krasnow, L Tamm, M D Greicius, T T Yang, G H Glover, A L Reiss, V Menon (Neuroimage, 200304)
comparison-fmri-activation--t-perceptual-cognitive-affective.asp

235.

Microsaccades uncover the orientation of covert attention.

Fixational eye movements are subdivided into tremor, drift, and microsaccades. All three types of miniature eye movements generate small random displacements of the retinal image when viewing a stationary scene. Here we investigate the modulation of ...
Ralf Engbert, Reinhold Kliegl (Vision Res, 200304)
microsaccades-uncover-orientation-covert-attention.asp

236.

Graspable objects grab attention when the potential for action is recognized.

Visually guided grasping movements require a rapid transformation of visual representations into object-specific motor programs. Here we report that graspable objects may facilitate these visuomotor transformations by automatically grabbing visual ...
Todd C Handy, Scott T Grafton, Neha M Shroff, Sarah Ketay, Michael S Gazzaniga (Nat Neurosci, 200304)
graspable-objects-grab-attention-potential-action-recognized.asp

237.

Neuron recognition by parallel Potts segmentation.

Identifying neurons and their spatial coordinates in images of the cerebral cortex is a necessary step in the quantitative analysis of spatial organization in the brain. This is especially important in the study of Alzheimers disease (AD), in which ...
S Peng, B Urbanc, L Cruz, B T Hyman, H E Stanley (Proc Natl Acad Sci U S A, 200304)
neuron-recognition-parallel-potts-segmentation.asp

238.

Adaptation to display rotation and display gain distortions during drawing.

The relationship between movement extent and movement direction coding mechanisms was investigated using a visuomotor adaptation paradigm. To determine if these mechanisms are either modular or interdependent, young healthy college students were tested ...
Ariel D Prager, José L Contreras-Vidal (Hum Mov Sci, 200304)
adaptation-display-rotation-display-gain-distortions-drawing.asp

239.

Time delays prior to movement alter the drawing kinematics of elderly adults.

Position sense has been found to decay as a function of the time delay the limb remains in a static position prior to movement onset. Position sense has also been found to deteriorate as a function of aging, with increased reliance on vision by the ...
Diana H Romero, Arend W A Van Gemmert, Charles H Adler, Harold Bekkering, George E Stelmach (Hum Mov Sci, 200304)
time-delays-prior-movement-alter-drawing-kinematics-elderly-adults.asp

240.

Attentional set for external information activates the right intraparietal area.

Visual attention can be allocated to a location or an object by using two different types of information: internal information and external information. The results of recent psychological studies [Bagon and Egeth, Percept. Psychophys. 55 (1994) 485] ...
Toshihide Imaruoka, Toshio Yanagida, Satoru Miyauchi (Brain Res Cogn Brain Res, 200304)
attentional-set-external-information-activates-right-intraparietal.asp