psych106-9

psych106-9 - Lecture 9 (Feb 7th): BRAIN DEVELOPMENT Lecture...

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Lecture 9 (Feb 7 th ): BRAIN DEVELOPMENT Lecture Outline 1) Overview of Neural Development 2) The Nature vs. Nurture Issue 3) Stages of Neural Development 4) Path-Finding by Axons (Nature) 5) Modi±cation of Development by Sensory Experience (Nurture) 6) Brain Evolution 7) Brain Size & Intelligence
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Development of the Nervous System (NS) “Pre-natal” vs. “ Post-natal Pre-natal terms: Gestation : period of time between conception and birth, i.e., pregnancy Embryonic : early prenatal development Fetal : late prenatal development
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Human Nervous System begins to form at 2 weeks gestation Neural Plate -> Neural Tube -> CNS (brain and spinal cord) Note: This lecture on BRAIN DEVELOPMENT (part of CNS), not on Spinal Cord (the other part of CNS) or PNS (Ventricular Zone)
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Brain Development During Gestation / At Birth At Birth = 350g, At 1 year = 1000g (adult = 1,200 to 1,400g)
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HUMAN BRAIN DEVELOPMENT: Prenatal to 12 years * but, reorganization of synapses occurs throughout life…. which is LEARNING Percent of Adult Level
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Nature vs. Nurture Issue NATURE -> pre-programmed (genetic) NURTURE -> shaped by environment and experience PRE-NATAL development NATURE … because it cannot be modifed by sensory experience
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This note was uploaded on 03/24/2012 for the course PSYC 106 taught by Professor Sage during the Spring '07 term at UCSD.

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psych106-9 - Lecture 9 (Feb 7th): BRAIN DEVELOPMENT Lecture...

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