HMB200H1 Study Guide - Comprehensive Midterm Guide: Premotor Cortex, Cerebellum, Cerebral Circulation
Document Summary
Signal is received from the environment, and transduced nto signals the brain can decode. Transcription in sensation electrical signal: occurs in the peripheral organs (eyes, ears, skin, etc. ) Lgn occipital lobe: input from each eye lands on specific columns of the cerebral cortex, organized in repeated sections- right eye, left eye, right etc . Injecting dye: inject dye into a cat"s one eye, dye is carried into the brain similar to electrical signals would be, see dye in columns ocular dominance columns (vertical stripes) Findings: at birth, these columns don"t really exist / aren"t prominent. Ocular dominance columns emerge only after eyes open they are light- dependent: without light sensory inputs, no synapses are weakened / strengthened. There would be no dedication of specific areas to specific eye. Dominance columns form: inputs from one eye- more coordinated w/ the wiring of the column (synapse strengthened), other eye less coordinated (synapse weakened pruned away)
