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12 Cards in this Set
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- Back
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What is anterior interosseous nerve (AIN) syndrome?
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Anterior interosseous nerve compression
Mostly motor Presents with pain |
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In the forearm, what is the course of the AIN?
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Between the FDP and FPL
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What are the possible sites of compression?
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Pronator teres (PT)
FDP Gantzer’s muscle (accessory head of FPL) rare |
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Are the superficial flexors or deep flexors affected with AIN syndrome?
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Deep flexors
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What muscles are innervated by the AIN?
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FDP index and long
FPL Pronator quadratus (PQ) |
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How can the FDP and FPL be tested?
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Ask patient to make the "Ok" sign
with index finger and thumb Flex thumb IP joint and flex DIP joint of index finger |
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How can the PQ be tested?
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Resisted pronation with the elbow flexed (eliminates contribution of pronator teres)
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lf the FPL is the only muscle affected, what diagnosis must be considered?
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FPL rupture (Mannerfelt-Noonan syndrome)
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lf bilateral involvement, what diagnosis must be considered?
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Parsonage-Turner syndrome
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What is the classic clinical presentation of this syndrome?
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Preceding shoulder pain followed by weakness
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What is the presumed etiology?
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Viral
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What study is helpful in the diagnosis of Parsonage-Turner syndrome?
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EMG
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