Attentional modulation of neural processing of shape, color, and velocity in humans
Article Abstract:
We are all bombarded by sensory information (sight, sound, touch, smell and taste) all of the time, and it is impossible for our brains to assimilate all that data at once. People usually respond to only a small portion of sensory information received. In this study of how people look for key visual information, researchers used positron emission tomography (PET) to measure changes in certain regions of the brain in response to visual stimuli. (PET is a sophisticated imaging technique that allows study of biochemical activity in the body.) Attributes such as the shape, color, or velocity of objects influences the behavioral and physiological measures of how visual processing occurs. Different parts of the brain seem to be involved in responses to shape, color, and velocity. Focusing attention on one attribute rather than among several increases the chance for seeing subtle changes, and changes the way different parts of the brain responsible for seeing (the visual cortex) processes information. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1990
User Contributions:
Comment about this article or add new information about this topic:
How the brain creates imagery: projection to primary visual cortex
Article Abstract:
Research indicates that visual imagery activates the primary visual cortex and that visual perception and visual imagery share a common neural substrate. Recent advances in the understanding of how the brain generates, stores and maintains visual imagery are discussed.
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Activation of extrastriate and frontal cortical areas by visual words and word-like stimuli. Influence of scene-based properties on visual search
- Abstracts: Induction of cellular senescence in immortalized cells by human chromosome 1. Expression of a zinc finger gene in HTLV-I and HTLV-II-transformed cells
- Abstracts: Too many rodent carcinogens: mitogenesis increases mutagenesis. part 2 Association of human papillomavirus types 16 and 18 E6 proteins with p53