Electromyography Findings in Radiation-Induced Unilateral Tongue Immobility

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Last updated 4:37 PM on 6/1/26
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6 Terms

1
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What is the most common CN damaged due to radiation

Hypoglossal

2
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Myokymia

Involuntary, continuous muscle contractions

3
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Fibrillation potentials

Muscle fiber contracts but it is not visible

Indicates recent/active denervation

4
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What is thought to be the cause of myokymia

Hyperexcitability of nerve caused by demyelination

5
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Mechanisms causing radiation induced nerve injury

Compression of nerve due to radiation fibrosis, nerve ischemia (restricted/blocked blood flow) caused by fibrosis

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How would nerve compression vs nerve ischemia present

Compression: fibrillation potentials

Ischemia: myokymia