3.1 Communication in the Nervous System (Outline)

[snort] [runners] Wounded Soldier 

  [MS]  [Nerve Gas]  [No-L-ITA]
 

1. Nervous Tissue: The Basic Hardware

Neuron

[Neuron]

Glia (="Glue")


2. The Neural Impulse: Using Energy to Send Information

A. The Neuron at Rest = A Tiny Battery

Resting Potential of Neuron

 

B. The Action Potential = Movement of Ions In/Out of Neuron

Action Potential

C. All-or-None Law

[All-or-Nothing Law]


3. The Synapse: Where Neurons Meet

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  • Synaptic Cleft
  • Synaptic Vesicles
  • Neurotransmitters
  • Receptor Sites
  • Reuptake channels
  • PSP (Post-synaptic potentials)
    • Excitatory
    • Inhibitory
  • Integrating signals in neural networks
    • sneural networks sculpted by elimination of old synapses = synaptic pruning

4. Neurotransmitters and Behavior

A. Acetylcholine (Ach)
B. Monoamines

1. Dopamine (DA)
2. Norepinepherine (NE)
3. Serotonin (5-HT)

(Pert & Snyder)C. GABA & Glutamate (amino acids)

1. GABA (inhibitory PSPs)
2. Glutamate (excitatory PSPs)


C. Endorphins