PSYC 355 Chapter Notes - Chapter 23: Stereopsis, Strabismus, Monocular Deprivation
Document Summary
Topographic maps - the ordered projection of a sensory surface. When the eye was rotated, the axons regrew to the right places, but they lived in an upside down world. The location in the retina will end up at their original target at the tectum. There are therefore gradients of transcription factors (in this case, ephrins) in the retina and in the tectum help axons from the retina to find the right target in the tectum. There is a limit in the number of trophic factors. Hebbian modification - cells that fire together, wire together. If we have cells firing at the same time, the combined firing is enough to elicit firing in the postsynaptic cell. The ones which are not strengthened will be lost. Synapse formation and pruning predetermined, and are set up during gestation. Experience independent : the general outlines of neural connections in the brain are.
