Seeing only the right half of the forest but cutting down all the trees?
Article Abstract:
Unilateral neglect after damage to the right side of the brain can be distinguished by failure of the global attentional processes of the right hemisphere to direct local detail of the left hemisphere to the contralesional left hemispace. Patients can recognize the global form of the left side of shapes but cannot cancel out the local details. The opposite behavioural dissociation in a patient with damage to the right hemisphere of the brain is reported, and psychological testing showed the abnormal tendency to respond to local features, but accuracy in interpreting global features, when there was no interference from local features in global processing.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Determining cortical landscapes
Article Abstract:
The sheet-like cerebral cortex is efficiently folded to allow it to fit into a small space. Contained within the folds are numerous functionally distinct areas joined by a network of nerve fibres. Different species have specific fold patterns which have unique relationships with the locations of the cortical areas. Data in support of D.C. Van Essen's Hypothesis, using cats and macaques, is presented.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Cortical feedback improves discrimination between figure and background by V1, V2 and V3 neurons
Article Abstract:
Neurons in several different cortical areas are activated by a single visual stimulus, but it is unclear how neural activity leads to a unified impression of what is being viewed. A new study of monkeys uses reversible inactivation of a higher order area to show that feedback connections intensify and focus signals in lower-order areas and that they are particularly important when visibility is low.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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