Uploaded on

 

More in: Education
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
165
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
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