5_ActionPotentialABBR - Slide 1 Neuroscience: Exploring the...

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Unformatted text preview: Slide 1 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright 2007 Lippincott Williams & Wilkins Bear: Neuroscience: Exploring the Brain 3e Chapter 04: The Action Potential Review: Ch 2 Neurons and Glia; Ch 3 The Neural Membrane at Rest Whats inside the nucleus? Outside? How does gene expression work? How are neurons and other cells the same? different? Slide 2 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright 2007 Lippincott Williams & Wilkins Resting potential Why is it called resting? Key players Na+ sodium lots of it outside the neuron K+ potassium lots of it inside the neuron Sodium-potassium pump So: inside of the neuron is very negatively charged, compared to the surrounding cytosol Slide 3 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright 2007 Lippincott Williams & Wilkins Peanut butter and jelly sandwich How long is 2 msec? Slide 4 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright 2007 Lippincott Williams & Wilkins Slide 5 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright 2007 Lippincott Williams & Wilkins Introduction Action Potential in the Nervous System Conveys information over distances Cytosol has negative charge relative to extracellular space Neural code - frequency and pattern Action potential Spike Nerve impulse Discharge Slide 6 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright 2007 Lippincott Williams & Wilkins Properties of the Action Potential The Ups and Downs of an Action Potential Oscilloscope to visualize an AP Rising phase, overshoot, falling phase, and undershoot Slide 7 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright 2007 Lippincott Williams & Wilkins...
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5_ActionPotentialABBR - Slide 1 Neuroscience: Exploring the...

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