Jaymie Ticknor Developmental Psychology 3620 Sect 853 25 September 2013 Lecture 11 Chapter 6 Powerpoint Synaptogenesis the development of synapse Pruning away of unused synapses use it or lose it after at least 3 years Experience expectant brain development critical window of development e g visual ability the critical period Experience dependent brain development practice effect e g play music practice makes perfect Most pruning processes complete by age 12 What continue to develop during adolescence exception from basic functions Prefrontal cortex reasoning judgment and impulse control emotional control The connections between reasoning centers and emotion centers amygdala Emotional responses in adolescents are less tempered by reasoning Act on their emotions without thinking through a situation For men if amygdala is stimulated then sexual arousal not in women s amygdala Myelination development of myelin sheath In order for neurons to work efficiently they need to be coated with a fatty substance known as myelin Myelination is still occurring after birth and through adolescence Myelination of speech centers and motor centers particularly fine motor skills motor development in the first few years It occurs in 2 directions Cephalocaudal head down Proximodistal center out to the extremities
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