The Biological Perspective The Biological Perspective Nervous System Controlling Sensing & Behavior Neurons & The Biologic...
Links to Learning Objectives <ul><li>NS, NEURONS & NERVES </li></ul><ul><li>LO 2.1  Nervous system, neurons, nerves </li><...
Nervous System, Neurons & Nerves Nervous Svstem. Neurons & Nerves Nervous System, Neurons & Nerves
Carries  information to and from all parts of the body ervous system
Branches of Nervous System PERIPHERAL Autonomic Somatic Para Sympathetic Brain Spinal Chord 2.1 What are the nervous syste...
Central Nervous System Brain Spinal Chord CENTRAL
Peripheral Nervous System PERIPHERAL Autonomic Somatic Para Sympathetic
Neuroscience <ul><li>Neuroscience  – study of neural structures, behavior and learning </li></ul>
Structure of the Neuron Dendrites Axon Soma Myelin
  Repairing Nerve Fibers “ … axons of neurons found in the body are also coated with a thin membrane called the  neurilemm...
Generating the Message: Neural Impulse <ul><li>All or none  – like the firing of a gun, the neuron either fires completely...
Generating the Message: Neural Impulse
The Synapse 2.2 How do neurons use neurotransmitter to communicate? The neurotransmitter is like a key and the receptor si...
Neuron Communication <ul><li>Excitatory neurotransmitter  - causes receiving cell to fire </li></ul><ul><ul><li>agonists m...
 
Cleaning Up The Synapse
Central & Peripheral Nervous Systems Nervous Svstems Central & Perioheral Central & Peripheral Nervous Systems
Central Nervous System <ul><li>Central nervous system  (CNS) – brain and spinal cord </li></ul><ul><ul><li>spinal cord - b...
Reflex Arc: Three Types of Neurons Afferent (sensory) neurons Efferent (motor) neurons Interneurons
Peripheral Nervous System <ul><li>Peripheral nervous system  (PNS) - all nerves and neurons not contained in the CNS </li>...
Autonomic NS: Parasympathetic “ Rest and digest” Some psychologists believe that extraverts are seeking to increase natura...
Autonomic NS: Sympathetic “ Fight or Flight” Some psychologists believe that introverts shy away from things in an attempt...
END OF FIRST SECTION OF SLIDES Jump to next section
Lecture Activities
Neural Squeeze Chain What is your reaction time like?  How many inches per second does a neural impulse travel?  Let’s fin...
<ul><li>If the neural impulse fires with same “strength” every time it fires, how can you tell the difference among differ...
<ul><li>In small groups, discuss how the sympathetic NS functions help out in a “fight or flight” situation. What are the ...
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The Nervous System

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The Nervous System

  1. 1. The Biological Perspective The Biological Perspective Nervous System Controlling Sensing & Behavior Neurons & The Biological Perspective
  2. 2. Links to Learning Objectives <ul><li>NS, NEURONS & NERVES </li></ul><ul><li>LO 2.1 Nervous system, neurons, nerves </li></ul><ul><li>LO 2.2 Neural communication </li></ul><ul><li>CENTRAL & PERIPHERAL NS </li></ul><ul><li>LO 2.3 Brain and spinal cord </li></ul><ul><li>LO 2.4 Somatic and autonomic systems </li></ul>STRUCTURES OF THE BRAIN LO 2.5 Studying the brain LO 2.6 Bottom part of the brain LO 2.7 Control of emotion, learning, memory, & motivation LO 2.8 Control of senses and movement LO 2.9 Higher forms of thought LO 2.10 Left and right sides of the brain THE CHEMICAL CONNECTION LO 2.11 Hormones & the nervous system
  3. 3. Nervous System, Neurons & Nerves Nervous Svstem. Neurons & Nerves Nervous System, Neurons & Nerves
  4. 4. Carries information to and from all parts of the body ervous system
  5. 5. Branches of Nervous System PERIPHERAL Autonomic Somatic Para Sympathetic Brain Spinal Chord 2.1 What are the nervous system, neurons and nerves? CENTRAL
  6. 6. Central Nervous System Brain Spinal Chord CENTRAL
  7. 7. Peripheral Nervous System PERIPHERAL Autonomic Somatic Para Sympathetic
  8. 8. Neuroscience <ul><li>Neuroscience – study of neural structures, behavior and learning </li></ul>
  9. 9. Structure of the Neuron Dendrites Axon Soma Myelin
  10. 10. Repairing Nerve Fibers “ … axons of neurons found in the body are also coated with a thin membrane called the neurilemma , or Schwann’s membrane. This membrane, which surrounds the axon and the myelin sheath, serves as a tunnel through which damaged nerve fibers can repair themselves.” -Page 50 (Ciccarelli & White)
  11. 11. Generating the Message: Neural Impulse <ul><li>All or none – like the firing of a gun, the neuron either fires completely or it does not fire at all </li></ul>
  12. 12. Generating the Message: Neural Impulse
  13. 13. The Synapse 2.2 How do neurons use neurotransmitter to communicate? The neurotransmitter is like a key and the receptor sites are like locks.
  14. 14. Neuron Communication <ul><li>Excitatory neurotransmitter - causes receiving cell to fire </li></ul><ul><ul><li>agonists mimic/enhance neurotransmitter effect on receptor sites </li></ul></ul><ul><li>Inhibitory neurotransmitter - causes receiving cell to stop firing </li></ul><ul><ul><li>antagonists block/reduce cell’s response to other neurotransmitters </li></ul></ul>
  15. 16. Cleaning Up The Synapse
  16. 17. Central & Peripheral Nervous Systems Nervous Svstems Central & Perioheral Central & Peripheral Nervous Systems
  17. 18. Central Nervous System <ul><li>Central nervous system (CNS) – brain and spinal cord </li></ul><ul><ul><li>spinal cord - bundle of neurons carries messages between body and brain </li></ul></ul>2.3 How do the brain and spinal cord interact?
  18. 19. Reflex Arc: Three Types of Neurons Afferent (sensory) neurons Efferent (motor) neurons Interneurons
  19. 20. Peripheral Nervous System <ul><li>Peripheral nervous system (PNS) - all nerves and neurons not contained in the CNS </li></ul><ul><ul><li>allows brain to communicate with senses </li></ul></ul>2.4 How do the autonomic and somatic nervous systems interact and control?
  20. 21. Autonomic NS: Parasympathetic “ Rest and digest” Some psychologists believe that extraverts are seeking to increase naturally low autonomic arousal.
  21. 22. Autonomic NS: Sympathetic “ Fight or Flight” Some psychologists believe that introverts shy away from things in an attempt to lower naturally high autonomic arousal.
  22. 23. END OF FIRST SECTION OF SLIDES Jump to next section
  23. 24. Lecture Activities
  24. 25. Neural Squeeze Chain What is your reaction time like? How many inches per second does a neural impulse travel? Let’s find out. We will need a stopwatch, a calculator and a little touching…
  25. 26. <ul><li>If the neural impulse fires with same “strength” every time it fires, how can you tell the difference among different stimulus intensities? </li></ul>
  26. 27. <ul><li>In small groups, discuss how the sympathetic NS functions help out in a “fight or flight” situation. What are the implications when the sympathetic NS remains active for extended time periods? </li></ul>

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