1. WHS AP Psychology Unit 3: Biological Psychology Essential Task 3-5b:Describe the subdivisions and functions of the peripheral nervous system: A. Somatic Nervous System B. Autonomic Nervous System –i. Sympathetic Nervous System (Fight or Flight) –ii. Parasympathetic Nervous System (Rest and Digest)

2. Central Nervous System Brain Brain Imaging Peripheral Nervous System Building Blocks Genetics Evolutionary Endocrine System Neurotransmitters Somatic Autonomic Sympathetic Parasympathetic Biological Psychology Spinal Cord Neurons SensoryMotor Nervous System We are here

3. Essential Task 3-5b: A. Somatic Nervous System B. Autonomic Nervous System –i. Sympathetic Nervous System (Fight or Flight) –ii. Parasympathetic Nervous System (Rest and Digest) Outline

5. The Somatic Nervous System Consists of neurons that communicate between the body and the brain Motor Neurons –Neurons that carry messages from the spinal cord or brain to muscles and glands

6. The Autonomic Nervous System Sympathetic division –Most active when you are angry, afraid, or aroused –Increases heart rate and breathing –Stops digestion –“Fight-or-flight”

7. SNS = Evolutionary Byproduct

8. Scared Bros

9. Hold me!

10. Congo line of fear

11. Swag gone scared

14. Even Flannel Bros have an SNS response

15. Connector Bros

16. I’m not really here to protect you. ( I just happen to be in front)

25. Fight, Flight and Freeze

32. The better to see you with my dear

38. The Autonomic Nervous System Parasympathetic division –Calms body –Produces effects opposite to those of the sympathetic division –Reduces heart rate and breathing –Restores digestion –“Rest and Digest”

39. The Hypothalamus Has Central Control of the ANS When someone experiences a stressful event, the amygdala, an area of the brain that contributes to emotional processing, sends a distress signal to the hypothalamus. This area of the brain functions like a command center, communicating with the rest of the body through the nervous system so that the person has the energy to fight or flee. The hypothalamus is involved in the coordination of ANS responses One section of the hypothalamus seems to control many of the "fight or flight" responses; another section favors "rest and digest" activities