A Brief Note On The Pathway Of Vision

994 WordsNov 30, 20154 Pages
1A. The pathway of vision is most easily explained by a light sensory neuron that is triggered and then is passed on to the interneurons, passed on to the LGN neuron in the thalamus, which then goes to the occipital cortex neuron. When the eye sees the red balloon start to come out of hand of the man, the left visual field picks it up and the light travels through the left eye of the retina to get to the photoreceptors, these signals are then passed through synapses to bipolar cells and from there to ganglion cells which leave the eye as the optic nerve. Some of the axons or ganglion cells cross over to the other side of the brain and some of those axons stay on the same side of the brain. This is so the visual field can cross the image over to the correct side of the brain that it will be essentially processed at. One pathway that the brain sees and image is the “old pathway’”, and this pathway would tell me where the balloon is and enables me to turn my head and body to follow it as it is released. The other pathway it is seen as is the “new pathway”, which determines what exactly the object is and then decides how to respond to the image. The temporal lobes control the “what” that you see, the parietal lobe controls the “how” pathway. 1B. Top- down processing is when the brain fills in information when the eye can’t see exactly everything that is suppose to be seen. For example, the blind spot in the eye that is created by the optic nerve is filled in with

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