Lecture0915final

Lecture0915final - Types of electrical potential recorded...

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Types of electrical potential recorded by intracellular electrodes in neurons The resting potential. The potential difference across the cell membrane of an un-stimulated neuron is usually –60 to –70 mV (inside potential minus outside potential) Action potentials. “All or none” depolarizations to between +10 and +50 mV - generally begin when membrane potential becomes more positive than appox. - 50 mV “threshold “ Graded potentials (Post) Synaptic potentials Generator potentials (a.k.a. “receptor potentials) in sensory neuron dendrites
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2.1 Types of neuronal electrical signals. (Part 1) Graded Potential changes to sub-threshold stimuli recorded in dendrites and close to cell bodies. (V m < approx -50mV)
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the cell body or beginning of the axon, an action potential can usually be recorded there (V m > -50 mV). Generator
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Lecture0915final - Types of electrical potential recorded...

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