PSYC 4070 Study Guide - Midterm Guide: Myelin, Neuroplasticity, Synaptogenesis
Document Summary
Same 4 stages in the same order invariant sequence. Go up a stage only when mature enough and had the right experience. The set of experience that one person needs may be different than another"s needs. He went away from rigid stages and sub stages. Most societies don"t start school until age 6. Preschoolers still learning motor skills (eating, dressing) and how to use paper and pencil. Eyes are not ready for lengthy, close work. The brain: neuron- transmits electrochemical messages when dendrites stimulated by other neurons. Action potential travels 200 m/s down the axon: end bulbs (terminal vesicles)- contains neurotransmitters. At the end of axons release transmitters substance after an action potential: synaptic gap- small space where neurotransmitters released are into the gap and either excite/inhibit the next neuron, myelin sheath, a white waxy substance along the axon. Makes the axon go faster and older parts myelinated first.
