Lecture, Chapter 3, post, part 1

Cones concentrated in fovea central point of focus 2

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Unformatted text preview: rods & cones) 1. Different placement: 1. cones concentrated in fovea (central point of focus) 2. rods in periphery 2. Different sensitivity: 1. cones 2. rods (bright light, colour, detail) (dim light; less detail) Retina 1. Receptor cells (rods & cones) 2. Bipolar cells 3. Ganglion cells (axons form optic nerve) 1. Area of retina that contains no receptors ______________ 2. Optic nerve leaves retina from here Visual Pathways •Light enters eye through to retina •Rods & cones transduce light energy into electrochemical signals (contain photopigment that reacts to light) Visual Pathways •Signal is passed to bipolar then ganglion cells •Optic nerve takes signal out of eye •Leading to separate brain hemispheres Most visual signals move toward lateral geniculate nucleus (LGN) of thalamus Visual Pathways Visual information moves to occipital lobe, the visual cortex _______________ _______________ __...
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