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Lecture

CHYS 1F90

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Department
Child and Youth Studies
Course
CHYS 1F90
Professor
Lauren Mc Namara
Semester
Fall

Description
Running head: CHYS 1F90 Assignment Two spaces after period. Child and Youth Studies CHYS 1F90 Dr. J. McNamara Fall/Winter 2011 Lecture Overview  Suomi’s theory  Macaque research  Brain Development  Neural Pruning Previous Research  Suomi uses Freud’s idea – What happens early affects adulthood – However, research is cloudy  Research with animals has permitted a more direct study of the relationship Rhesus Macaques  Macaques shared 90% of our genes  Basic troop behaviour (Macaques share the same group mentality as people) 20% of Macaque Population  Highly reactive monkeys  Prolonged HPA activation  High cortisol levels  High stress Put a plastic clown in the Macaque habitat. Most pat it, sniff it, and continue on their routines. 20% of the Macaques hurt themselves trying to leave the habitat. In nature, they die young, have low reproduction levels, and eat last. Unusually supportive moms  20% of macaque mothers exhibit very supportive care of their infants Overly affectionate with their infants. When the clown is in the habitat, they would hold the infant, and not let it escape, and show them the clown so the infant wouldn’t be scared. Crossbreeding  Process of breeding with the intention to create offspring that share the traits of both parent lineages – Understanding genetics  Increases the likelihood that a highly reactive monkey will be born The Result  Highly Reactive Infant  Highly Nurturing Mom Adoption: cross fostering. He puts a highly reactive infant with a highly nurturing Mom. The Experiment Lessons Learned from Rhesus Monkeys  Neural sculpting  Social and physical environments shape the networks and patterns of the brain  Modification of neural pathways as a function of experience The brain can be shaped by the social environment. This is called neural sculpting. What’s happening…?  The changes are not simply behavioural  Changes in biology - neurology Suomi changed the way that a brain worked simply through changing the Macaques moms. Understanding Neural Connections Strengthening a neural connection through experience Neural Synapse Gap between neurons where messages fire between neurons  A connection of neurons  Allow the nervous system to connect to and control other systems of the body  Messages throughout the body Synaptogenesis  Starts prenatally and extends well into childhood years  Stability, strength of synapses depend on effective firing of connections Neurons must be used or else they are lost. To use neurons, they must be strong and stable. Neural Development · Effectiveness determined by speed that neurons
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