Your SlideShare is downloading. ×
Chpt 4 part 2
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Saving this for later?

Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime - even offline.

Text the download link to your phone

Standard text messaging rates apply

Chpt 4 part 2

171
views

Published on

Published in: Education

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
171
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Components of the Nervous System Glial cells (glia)  Provide firmness and structure to the brain  Get nutrients into the system  Form myelin  Create the blood-brain barrier  Initially thought to be passive in comparison to “flashy” neurons  Communicate with other glia & neurons  New frontier: play a central role in addiction and mental health issues Neurons  Analyze and transmit information  Four defined regions  Cell body  Dendrites  Axon  Presynaptic terminals  Communicate through neurotransmitters
  • 2. Neuron
  • 3. Chemical Pathways: Neurotransmitters 7 Main neurotransmitters in the study of psychoactive drugs  Dopamine  Serotonin  Norepinephrine  GABA  Endorphins  Glutamate  Acetylcholine
  • 4. Chemical Pathways: Neurotransmitters 1. Dopamine  Component of “reward” properties of drugs  Mood & movement  Attention & memory 2. Serotonin  Mood & sleep  Desire & impulse  Stimulants & Hallucinogens 3. Norepinephrine  Mood & movement  Memory & sensory processing  Stimulants
  • 5. Chemical Pathways: Neurotransmitters 4. GABA  Sedation, drowsiness and relaxation  Depressants 5. Endorphins  Pain relief & sedation  Rate of bodily functions  Opioids 6. Glutamate  Learning, cognition & memory  Hallucinogens & alcohol 7. Acetylcholine  Involved in diverse processes: memory, attention & mood  Nicotine
  • 6. Impact on Neurotransmission Psychoactive substances can impact neurotransmitters in both the intoxication and withdrawal process Many ways psychoactive drugs can impact neurotransmission - 3 common ways:  Increase neurotransmitter activity  Agonist  Reduce neurotransmitter activity  Antagonist  Blocking reuptake of neurotransmitter  Reuptake inhibitors
  • 7. Chemical Theories of Behavior Variations in behavior explained through changes in brain chemistry  Historical and cultural perspectives  Monoamine theory of mood  Issue of experimental support Brain imaging techniques  Types  Reactions