KINE 3020 Chapter Notes -Lateral Geniculate Nucleus, Optic Chiasm, Angular Gyrus

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The optic nerves from the left and right eyes leave the retina at the optic disk in the back. They travel to the optic chiasm where the nerves from each eye come together. Axons from the nasal side of the eyes cross, while those from the temporal side do not cross. Vision allows us to identify objects in space and to determine their movements, this is considered an exteroceptive sense: two people witnessed the same car accident, yet had two different perceptions of the event. The ventral stream is responsible for processing fine detail, contrast, contours and colour processing what and terminates in the inferotemporal cortex: the proposed two visual systems model suggests a dorsal and ventral stream. Movement agnosia (perceptual deficit) occurs after damage to the middle temporal or medial superior temporal regions of the cortex. Specific loss of motion perception without any other perceptual problems. **mediates the required sensorimotor transformations for visually guided actions directed at those objects.

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