Grouping of image fragments in primary visual cortex
Article Abstract:
It has been established that some orientation-selective cells in the primary visual cortex (V1) have response properties that can mediate the grouping of image fragments. It is suggested that cells as early as V1 have the computational ability to make inferences about the nature of partially invisible forms located behind occluding structures. It is concluded that border completion is undertaken in the very early stages of visual processing, with information available from the early stages being integrated for the higher-order interpretation of surface relations.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Global plasticity in adult visual cortex following reversal of visual input
Article Abstract:
Research on neuronal activity in the visual cortex of monkeys shows that adaptation to visual field reversal takes place through intervention of large-scale functional reorganization at an early stage in the visual processing path. Some cells in the primary visual cortex respond to stimuli on the ipsilateral visual field as well as on the contralateral field. The response to the ipsilateral simulation is associated with adaptation to optical distortions. The alterations are not limited to local regions and may occur in the entire area of primary visual cortex.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Implicit estimation of sound-arrival time
Article Abstract:
The brain, in sensing the sound emanating from the movement of a visible object, coordinates the visual and auditory input so that no delay is perceived even though the sound arrives later (for distant source objects, such as fireworks or an aircraft, this is not as effective). The authors show that coordination happens because the brain utilizes information regarding distance that is provided by the visual system to calibrate simultaneity.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
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