PSYC 2P35 Lecture Notes - Lecture 9: Visual Cortex, Bipolar Neuron, Phosphodiesterase
1 Oct 2015
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Neurons code all or none and in a binary fashion. Ex. the t of e has been reached or not, therefore the ap will fire to its fullest extent, or not at all as a function of stimulus reception/detection. They can include variations in the stimulus via: Eye does reception; determines how well something is received. Must have reception to have transduction to have coding. Ciliary muscles: control for shape of lens, need to adjust bc it has to be a certain shape for you to see close, far and midway. Type of receptor cells differ in density patterns in the macula. In periphery of retina, higher rods than cones responsible for things catching our eye in the periphery. Cilliary muscles contract (lens rounded) for closure vision. Ciliary muscles relax (lens flattened) for distant vision. Myopia: nearsightedness (can"t see far) comes first in aging. Presbyopia: both are challenged (could come both through aging and genetically)
