This document discusses radial nerve palsy, which can occur in the axilla or spiral groove of the humerus. Complete radial nerve palsy in the axilla results in a loss of all functions and can be caused by crutch use, artery aneurysm, or shoulder surgery/trauma. For high radial nerve palsy in the spiral groove, elbow extension is weak while supination, wrist extension, finger extension, and cutaneous sensation are lost, often due to fracture or tourniquet use.

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13. Complete Radial nerve palsy (Very
high)
Site : Axilla
Causes:
1.Crutch palsy
2.Axillary artery aneurysm
3.Shoulder surgery or trauma
Complete nerve palsy :
All functions are lost
Motor: Elbow extension
Supination
Wrist extension( wrist drop)
Finger extension( finger drop)
Sensory: All sensory areas supplied

14. High radial nerve palsy
Site : In the Spiral groove
Causes: 1.# Shaft of humerus M/3rd.
2.Torniquet palsy.
Functions lost:
1. Elbow extension weak(but present )
2. Supination lost
3. Wrist drop
4. Finger drop
5. Lower lateral cutaneous nerve of arm and
posterior cutaneous nerve of arm.