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Aetiology

Last reviewed May 20, 2023

Characteristic presentations of radial nerve palsy include:

'crutch palsy' - due to compression of the nerve above the spiral groove by crutches as the weight is borne in the axilla
'saturday night palsy' - due to compression of the nerve in the upper part of the arm as a result of resting the medial side of the arm against a sharp edge such as the back of a chair for a prolonged period. The person is usually intoxicated. It may also be seen after surgery when the anaesthetised patient is allowed to hang over the edge of the operating theatre table.
humeral fracture
rarely, dislocation of the elbow

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