Anatom3DPosterior division of middle trunk of brachial plexus
Divisio posterior trunci medii plexus brachialis · Zadní oddíl středního kmene pažní pleteně
Nervous system
Looks like
The back branch of the middle trunk, behind the collarbone; it joins the posterior cord.
What it does
Carries fibres mainly for the triceps and forearm extensors via the radial nerve.
Keeping it well
Not examined on its own; it matters to understanding which nerves a plexus injury affects.
Related conditions
- Amyloidosis (AL and ATTR)
- Botulism
- Chickenpox (varicella)
- Chronic neuropathic pain
- Chronic pain syndrome
- Fibromyalgia
- Frozen shoulder (adhesive capsulitis)
- Guillain-Barré syndrome
- Lyme disease
- Myasthenia gravis
- Peripheral neuropathy
- Polymyalgia rheumatica
- Rabies
- Restless legs syndrome
- Shingles (herpes zoster)
- Shoulder dislocation
- Tetanus
- Thoracic outlet syndrome
- Vitamin B1, C and other deficiencies