PSY345H5 Lecture Notes - Ataxia, Retinotopy, Grey Matter
Document Summary
About one third of human cerebral cortex is devoted to visual analysis and perception. Visual field the area you can see without moving your head or eyes. Only in the center of the visual field you perceive objects accurately (not notice it since move eyes rapidly as you scan the scene) Visual acuity the sharpness of vision. Each of our senses has specialized receptors that are sensitive to a particular kind of energy. Receptors for vision are sensitive to light. Photoreceptors neural cells in the retina that respond to light. They transduce (convert) energy into electrochemical patterns. Law of specific nerve energies activity by a particular nerve always conveys the same type of info to the brain. Impulses from one neuron indicate light, impulses from another neuron indicate sound etc. Brain does not duplicate what we see, sensory coding is determined by which neurons are active.
