magnocellular system

magnocellular system

A cerebral “circuit board” that is part of the visual system, which may be active during the eye movements and required for reading words.
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Parasol cells process dynamic information and form the basis of the magnocellular system.
The parvocellular system may be very important in color discrimination, spatial resolution, depth perception, stereopsis and object detection [26], whereas the magnocellular system has shown a significant role in motion perception, luminance and contrast perception [28].
These environmental visual pieces of information, which are instantly transmitted through the parvo- and magnocellular systems to the visual cortex, determine the sensory-motor behavior of players [32].
The magnocellular system is specialized for timing visual events and hence for detecting visual motion.
The magnocellular system is important for processing rapidly changing information and projects to both subcortical and cortical brain areas, including the primary visual cortex.
The parvocellular system appears to be specialized for the perception of patterns and colors, while the magnocellular system responds particularly well to moving stimuli.
Visual mid-line shift syndrome results from dysfunction of the magnocellular system, which causes a shift in concept of the visual mid-line.
It is this visual processing stream that also forms the basis of the Frequency Doubling Technology (FDT) employed by a perimeter manufactured by Carl Zeiss Meditec, since it is believed that damage to the magnocellular system in early glaucoma can be detected before threshold testing methods.
Many studies have found that a subtle deficit of visual processing is often associated with dyslexia; a deficit of the magnocellular system.