Intro to Neuroscience.

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The Nervous System The nervous system contains billions of cells called neurons. The nervous system contains billions of cells called neurons. Neurons.

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Presentation transcript:

Intro to Neuroscience

Agenda Groups Discussion Neural Messages Get in your group Assign numbers to your members (1-4) Discussion Neural Messages Parts of a Neuron Neuron Activation Neurotransmitters at the Synapse

Reading Discussion No writing allowed.

A Note About Neuropsychology Technical Limited Time Book Coverage vs. Our Goals

The Neuron Nerve Cells - Billions in the nervous system - Carry chemical “messages”

Receives messages from other neurons

Carries messages to other neurons

Fat and protein coating on the axon that aids transmission

Where messages are sent to other neurons.

Resting Potential

Action Potential All-or-None - Message is either transmitted or it is not

Action Potential In Action http://www.youtube.com/watch?v=yQ-wQsEK21E On WebCT

The Synapse Synapse Neurotransmitters - Specialized chemical messages - Space between terminal button and dendrite Neurotransmitters - Specialized chemical messages The Synapse

Transmitter-Receptor Fit Three Sites: - Two on the terminal buttons -- Release Sites -- Reuptake Sites - One on the dendrites -- Receptor Sites Neurotransmitters are specialized. Different neurotransmitters have specific sites. Terminal Button Transmitter-Receptor Fit

Drugs at the Synapse

Neurotransmitters’ Specialized Roles Many varying effects on behavior/thought. Neurotransmitters either inhibit or excite the next neuron. Inhibitory Messages – Makes firing less likely. Excitatory Messages – Makes firing more likely. Neurotransmitters are not limited to one role all the time. Are usually one or the other most of the time.