Compound muscle action potential
Compound Muscle Action Potential
The Compound Muscle Action Potential (CMAP), pronounced as /ˈkɒmpaʊnd ˈmʌsl̩ ˈækʃən pəˈtenʃl/, is a measure of the summated electrical activity of a group of muscle fibers in response to a single nerve impulse.
Etymology
The term "Compound Muscle Action Potential" is derived from the English language. "Compound" comes from the Latin "componere", meaning "to put together", "Muscle" from the Latin "musculus" meaning "little mouse", "Action" from the Latin "actio" meaning "a doing", and "Potential" from the Latin "potentia" meaning "power".
Definition
The Compound Muscle Action Potential is the electrical signal produced by a group of muscle fibers when they are activated by a single nerve impulse. This signal can be recorded using electrodiagnostic techniques such as electromyography (EMG). The size of the CMAP can provide information about the number of muscle fibers that are activated and their degree of activation.
Related Terms
- Electromyography (EMG): A diagnostic procedure to assess the health of muscles and the nerve cells that control them.
- Motor Unit: A motor neuron and the skeletal muscle fibers innervated by its axon.
- Nerve Conduction Study (NCS): A medical diagnostic test commonly used to evaluate the function, especially the ability of electrical conduction, of the motor and sensory nerves.
- Neuromuscular Junction (NMJ): A synapse between a motor neuron and skeletal muscle.
See Also
External links
- Medical encyclopedia article on Compound muscle action potential
- Wikipedia's article - Compound muscle action potential
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