Entrapment sites

Most Common Sites of Peripheral Nerve Compression

• Crutch palsy (berlová obrna) – compression of n. radialis in the axilla/proximal arm when using crutches incorrectly, especially when bearing weight on the armpit.
• Sulcus nervi radialis (spiral groove) - compression during humerus fractures or pressure.
• Lateral intermuscular septum - passage to the anterior compartment of the arm.
• Arcade of Frohse - fibrous arch of the supinator, the most common site of compression of the deep branch.
• Supinator tunnel (radial tunnel) - compression of the deep branch in the supinator.
• Fascia of m. brachioradialis and m. extensor carpi radialis longus - compression of superficial branch, Wartenberg syndrome.
• Crossing with v. cephalica - irritation/compression during cannulation or catheter placement.