PSYC3241 Lecture Notes - Lecture 15: Exposure Therapy, Synaptic Pruning, Electrodermal Activity
30 May 2019
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Document Summary
Key element for effective exposure is the process of extinction. At fear extinction test, adolescents show high levels of freezing. Adolescents rats exhibit a marked impairment of fear extinction retention. Cs +) as well as cs - and measured skin conductance. Patweel et al (2012) fear conditioned humans- loud sound of someone screaming (cs +) Found children and adults show less fear during extinction. Adolescents showed high fear- they don"t learn that the cs+ is now safe. In mice, fear conditioned in context a and extinction in context b across 4 days (days 2- Found juvenile and adult mice showed change across days. Adolescents did not- showed less decrease in fear. Human and mice show deficits in both acquiring and extinguishing fear. At a neurobiological level, pruning (elimination of unused synapses) and myelination (ax. Loss of neurons during adolescence caused by pruning- genetic influence, "use it. Myelination increases communication- take remaining neurons and make them m.
