Visual Information Processing Paper Week 2 PSYCH640

1689 Words Feb 23rd, 2015 7 Pages
Visual Information Processing
Roland Browne
PSYCH/640
December 16, 2013

Visual Information Processing
The human brain is capable of perceiving and interpreting information or stimuli received through the sense organs (i.e., eyes, ears, nose, mouth, and skin) (Weiten, 1998). This ability to perceive and interpret stimulus allows the human being to make meaningful sense of the world and environment around them. However, even as the human being is able to perceive and interpret stimuli information through all sense organs, stimuli is most often or primarily interpreted using the visual (eyes) and auditory (ears) sense organs (Anderson, 2009). However, for the purpose of this paper, the visual information process will be examined.
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The nerves from the outer part of the retina continue to the same side of the brain as the eye so that the right half of both eyes are connected to the right brain (Anderson, 2009). Therefore, the left side of the visual field falls on the right half of each eye. Accordingly, information concerning the left part of the visual field goes to the right side of the brain. Fibers from the ganglion cells, once inside the brain, synapse onto cells in various parts of the subcortical structures located below the cortex: the lateral geniculate nucleus and the superior colliculus (Anderson, 2009). The lateral geniculate nucleus perceived detains and recognizes objects and the superior colliculus is involved in located objects in space (Anderson, 2009). Both structures are connected to the primary visual cortex which is the first cortical area to receive visual input. The ganglion cells then encode the visual fields by means of the on-off and off-on cells which “…generally fire at some spontaneous rate even when the eyes are not receiving light,” (Anderson, 2009, p. 37). The on-off cells are cells for which light father from the center elicits no change from the spontaneous firing rate with neither an increase nor decrease. The off-on cells are cells for which “…light

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