NORTH BIOL& 241 - Lab 18B Neurophysiology: Simulation of Nerve Impulses (13 pages)

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Lab 18B Neurophysiology: Simulation of Nerve Impulses



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Lab 18B Neurophysiology: Simulation of Nerve Impulses

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Lecture Notes


Pages:
13
School:
North Seattle College
Course:
Biol& 241 - Human A & P 1
Human A & P 1 Documents

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Lab 18B Neurophysiology Simulation of Nerve Impulses PhysioEx CD ROM came with lab manual You will manipulate a model of a nerve not a single neuron but a bundle of axons and see what happens 3 Exercises Eliciting a nerve impulse Inhibiting a nerve impulse Nerve conduction velocity Eliciting a nerve impulse Eliciting a nerve impulse Set voltage at 1 0 by clicking button Click Single Stimulus Increase voltage until you get a population action potential Click Record Data Increase by 0 5 and see what happens Keep increasing until no further change Record Data Remember you are not seeing a single AP but a collection of action potentials in many axons within a nerve Click Clear Eliciting a nerve impulse Click the glass rod and drag it over the nerve Compare to your threshold AP do it again to see them next to each other Record Data Now drag the rod to the heater and click heat When it turns red drag it onto the nerve Compare it to unheated trace Record Data Eliciting a nerve impulse Click and drag the NaCl dropper over to the nerve and release drops note what happens Record Data Now run a Single Stimulus at threshold and see how it differs from NaCl application Clean and Clear Repeat the drap and drop with HCl Record Data then compare with a Single Stimulus Inhibiting a nerve impulse Inhibiting a nerve impulse Chose I a n i from Experiment drop down Test the effect of ether by clicking and dragging it onto the nerve then set to threshold and Stimulate Record Data Now click on Time min to change time scale to 10 min Set interval between stimuli to 2 0 min Make sure it is set to threshold and click Stimulate watch how long it takes to return to normal Click Stop return interval to 0 0 and Clean and Clear Inhibiting a nerve impulse Test the effects of cuare an ACh blocker by clicking and dragging onto nerve Stimulate at threshold and see what happens Record Data Clean and Clear Test effects of lidocaine by dragging it and Stimulate at threshold Record Data Nerve conduction



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