PSYCH 2AA3 Lecture Notes - Lecture 4: Myelin, Frontal Lobe, Axon Terminal
2 Jun 2020
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Document Summary
Neural development: dendrites: propagate the electrochemical signal from other neural cells. Information enters the dendrite through neurotransmitters, message is then relayed: myelin sheath is made of glia cells it is a fatty sheath that insulates neuron. Each part of the brain needs to have a sufficient number of neurons: neuron migration occurs within the first two years, post 2 years the connections start to decrease, programmed neuronal death: immature neurons are eliminated surrounding. In two ways: programmed neuronal death, synaptic pruning new synapses: synaptic pruning: underused axons and dendrites are eliminated allows for increased efficiency, speed, and complexity. Experience-expectant processes: experiences that are expected in normal environments visual input, language, nutrition, care and touch (most babies get these, when basic needs are not met impairments associated with these needs occurs. Looking at these types of development: perceptual development, motor development, cognitive development, social-emotional development, language development.
