Attention is everywhere
Article Abstract:
Visual attention in primates is modulated by two cortical pathways, which are organized hierarchically and in which attentional effects are seen early in the hierarchy. The dorsal pathway transmits messages to the parietal cortex, while the ventral pathway transmits information to the temporal lobe and is responsible for object recognition and visual working memory. Attentional control or selection mechanisms appear early in the cortical pathways and the visual system contains only one set of mechanisms which is responsible for selective attention.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Collinear stimuli regulate visual responses depending on cell's contrast threshold
Article Abstract:
It is shown that neuronal facilitation occurs preferentially when a near-threshold stimulus within the receptive field is flanked by higher-contrasting collinear elements sited in the surrounding areas of visual space. Collinear and orthogonally oriented flanks work to reduce the response to high-contrast stimuli within the receptive field. Neuronal response modulation by stimuli outside of the receptive field, may be an early neural mechanism to encode objects and improve their perceptual saliency.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Convergence of magno- and parvocellular pathways in layer 4B of macaque primary visual cortex
Article Abstract:
Inputs from magnocellular-stream-recipient layer 4C-alpha neurons and parvocellular-stream-recipient layer 4C-beta neurons converge at layer 4B neurons of the primary visual cortex. The parvocellular pathway of visual processing considerably affects the cortical regions receiving direct or indirect input from layer 4B. Laser-scanning photostimulation is used with intracellular recording and biocytin labeling to determine the sources of the local functional inputs to the layer 4B neurons.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: The information superflyway. Emergence of simple-cell receptive field properties by learning a sparse code for natural images
- Abstracts: Distinct functions of nuclear and cytoplasmic calcium in the control of gene expression
- Abstracts: Novel sensations in the congenitally blind. Improved auditory spatial tuning in blind humans. A new brain region for coordinating speech articulation
- Abstracts: Time to grasp the international perspective on GM crops. Transgenic pollen harms monarch larvae. Risks from transgenic crops
- Abstracts: Pest control by fluorescence. Regulation of receptor-mediated endocytosis by Rho and Rac. Simultaneous independent measurement of endocytosis and exocytosis