Lecture 8

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Published on 28 Jan 2011
School
UTSC
Department
Psychology
Course
PSYA02H3
Professor
Psychology Lecture 8
Child Development
-test intelligence by giving a not abstract question and receive a definite answer from child
-development of attachment with caregiver and parents
-zygote divides to form nerve and brain cells
-nerve cells form connection through synapse
-neurons communicate through firing
Themes of the Video
1) how do neurons find their place, know where to go , and what functions it serve
2) are all connections equally important
3) to what extent does plasticity contribute to the development of brain region
-is the function of a region permanent or changeable
-each nerve cell forms 1 to 10 000 connection
-communicate through charged electrical pulse
-nervous system is in an organized, non-random manner
-unlike skin cells, neurons cannot be replaced and do not replicate itself
-they function throughout the life time
-grow in neural tube, layer after layer like an onion
-hold on to guard cell with its nucleus at the back during migration from brain to body location
-travel in wave
-evidence to support that young neuron has an idea of its migration
-recognize its position in the brain
-produced from stem cell
-the migration destination is determined from neighbouring cell
-young neuron that is developed for a while does not follow its neighbouring cell, it goes to its
own specific destination
-wiring and connection depend on instruction of gene
-when neurons are used frequently, it strengthens its function
-use it or lose it hypothesis
-neuron is a dynamic structure in response to process of strengthening
-did an experiment to rewire neuron to visual cortex and auditory cortex in an animal
-if ear shows visual function, it means gene is important
-if it does not, nurture and input is important
-auditory cortex has been transformed, but not entirely
-it shows a less orderly pinwheel of the colour wheel from some imaging technique in the ear
-shows that environment shapes brain, but cannot change genetic destiny
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Document Summary

Test intelligence by giving a not abstract question and receive a definite answer from child. Zygote divides to form nerve and brain cells. Themes of the video: how do neurons find their place, know where to go , and what functions it serve, are all connections equally important, to what extent does plasticity contribute to the development of brain region. Is the function of a region permanent or changeable. Each nerve cell forms 1 to 10 000 connection. Nervous system is in an organized, non-random manner. Unlike skin cells, neurons cannot be replaced and do not replicate itself. Grow in neural tube, layer after layer like an onion. Hold on to guard cell with its nucleus at the back during migration from brain to body location. Evidence to support that young neuron has an idea of its migration. The migration destination is determined from neighbouring cell.