1. Unit 4: Biological Psychology
WHS AP Psychology
Unit 4: Biological Psychology
Essential Task 4-5b: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)
Logo Green is R=8 G=138 B= Blue is R= 0 G=110 B=184
Border Grey is R=74 G=69 B=64

2. Biological Psychology
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
Sensory
Motor
Nervous System
We are here

3. Essential Task 4-5b: A. Somatic Nervous System
Outline
A. Somatic Nervous System
B. Autonomic Nervous System
i. Sympathetic Nervous System (Fight or Flight)
ii. Parasympathetic Nervous System (Rest and Digest)

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