Unique morphology of the human eye
Article Abstract:
Humans are the only primate species whose coloured iris is surrounded by a wide area of white sclera which allows their gaze direction to be easily identified. Almost 50% of all primate species were studied, with humans found to have the most exposed sclera. Eye movement is increased which expands the visual field, particularly horizontally. Attacks often ensue from direct eye contact among many primates, with direction of gaze a key element in communication. Gaze direction is easily identifiable in humans as the human sclera is lighter than skin tone.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Contrast dependence of contextual effects in primate visual cortex
Article Abstract:
Recent research into the responses to stimuli of neurons in the visual cortex has established that there are a number of factors which determine how single neurons integrate information across the visual field. The integration of information depends both on the precise form of stimuli at various locations and on the relative contrasts of these stimuli. There is still some uncertainty about the role of contextual effects, but they may play a role in detection of orientation discontinuities.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Objective analysis of the topological organization of the primate cortical visual system
Article Abstract:
The division of the primate cortical visual system into dorsal and ventral streams with limited cross-talk was confirmed using an optimization approach. This approach analyzed various parcellation schemes to determine how the cortical regions correspond to the configuration of points. Organization of the primate visual cortex is also marked by streams that are hierarchical and meet in area 46 and at the superior temporal polysensory area and by the innervation of adjacent areas.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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