Recording of nerve potentials after the electrical stimulation of an anaesthetised earthworm (with the Cobra3 Basic-Unit

Principle and tasks

To work on the following themes by measuring nerve and muscle potentials:

• The action of an anaesthetic
• The different conduction velocities of median and lateral giant fibres
• Refractory period of the median giant fibre

What you can lern about

• Nerve and muscle potentials
• Electrical stimulation
• Anaesthetization of muscles
• Electrical resistance of nerve fibres
• Double pulse stimulation
• Refractory period

Literature for this article als follows

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