PSC101_Fall10_Lecture+4_handouts

PSC101_Fall10_Lecture+4_handouts - 10/30/2010 1 2 Today:...

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10/30/2010 1 Introduction to Psychobiology: Lecture 4 Becky Morgan UC Davis November 1, 2010 1 Today: Chapter 12 Stress Circuits Stress studies 2 3 Neural activation Very fast Inputs from many parts of brain Coordinates response 4 Hypothalamus (arcuate nucleus pathway) Midbrain Periaqueductal Gray (PAG) Spinal Cord Increases heart rate Vagus Nerve Beta Endorphins Pain Suppression
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10/30/2010 2 5 BRAIN Adrenal Medulla Sympathetic arousal from Spinal Cord Liver Epinephrine Glycogen Glucose Energy for muscles (Glucose may also influence memory) 6 Adrenal Cortex Anterior Pituitary Adrenocorticotropin (ACTH) in blood stream Cortisol (corticosterone) Pancreas (decrease insulin) Liver Glycogen Glucose Energy for muscles Glucagon: helps Hypothalamic Pituitary Adrenal (HPA) Axis Hypothalamus Corticotropin Releasing Hormone (CRH) Insulin Secreted from pancreas Spikes after meal Promotes conversion of glucose to glycogen Storage in liver and muscles Inhibited by cortisol Glucose not stored Glucose ready for use 7 2 Systems Epinephrine Cortisol Fast action system Neural activation 2 minute half-life Rapid, short release of glucose Slower acting system Hormonal activation (blood) 2 hour half-life Longer term effect; chronic stress 8
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This note was uploaded on 11/14/2010 for the course PSC PSC100 taught by Professor Luck during the Fall '10 term at UC Davis.

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PSC101_Fall10_Lecture+4_handouts - 10/30/2010 1 2 Today:...

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