Lecture1 - Biological Genetic PSC 101 Introduction to...

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1 PSC 101 Introduction to Psychobiology Biological Genetic • Growing knowledge of biological mechanisms of behavior is often over- interpreted • Complex relationships between biology and behavior are rarely conveyed in a “sound-bite” Taking the “vs.” out of nature vs. nurture •“ …a devil, a born devil, on whose nature Nurture can never stick” – William Shakespeare ( The Tempest , 17 th century) •“ Give me a dozen healthy infants…. . – John B. Watson ( Behaviorism , 1930) • How do biological mechanisms mediate genetic and environmental effects on behavior? Highlights: Part 1 • How is electrical stimulation of the brain used to treat brain disorders? • How does sonic hedgehog organize your brain?
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2 Highlights: Part 2 How do genetics influence behavior? How does your environment affect gene expression? Smartsite Resources • Powerpoint slides • Discussion papers – Oct. 5 th – Oct. 11 th Exams • Three mid-term exams – Oct. 18 th – Nov. 10 th –Dec 8 th , 10:30 AM-12:30 PM Your Instructor: Trainor • Gene-environment interactions and social behavior in mice • Effects of steroid hormones on behavior Office Hours • Tues and Wed. 1-2 Structure and Function of Nervous System
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3 Outline • Cells in the nervous system – Neurons –G l ia • Action Potential – Ion Channels – Polarization • Synaptic Signaling – Chemical – Electrical – Dendritic Figure 1.5 Levels of Analysis in Biological Psychology Neurons • Neurons are cells that transmit information • Neurons are composed of: – Cell body : contains nucleus and protein synthesizing machinery for rest of cell – Dendrites : extensions that receive information – Axon : extends from cell body, carries electrical potential, sends a chemical message to adjacent neurons Parts of the Neuron Glial cells • Originally thought to just hold together nerve cells (“glue”), it is becoming clear that glial cells have
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4 Astrocytes and Microglia • Astrocytes – Have distinct “star shape” – Can regulate neural transmission and blood flow • Microglia – Can move about within the brain – Migrate to sites of injury or disease Oligodendrocytes and Schwann Cells • Wrap axons with mylein • In central nervous system: oligodendrocytes • In peripheral nervous system: Schwann cells Myelination of axons Outline • Cells in the nervous system – Neurons –G l ia • Action Potential – Ion Channels – Polarization • Synaptic Signaling – Chemical – Electrical – Dendritic Action Potentials
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This note was uploaded on 11/14/2010 for the course PSC Psychology taught by Professor Cossowings during the Fall '08 term at UC Davis.

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Lecture1 - Biological Genetic PSC 101 Introduction to...

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