The brachial plexus is a network of nerve fibres that supplies both motor and sensory input to the upper limb. It originates in the root of the neck then passes through the axilla into the upper limb.
| Part of plexus | Notes |
|---|
| Origin | Anterior rami of C5 to T1 |
| Sections of the plexus | - Roots, trunks, divisions, cords, branches
- Mnemonic:Real Teenagers Drink Cold Beer
|
| Roots | - Located in the posterior triangle
- Pass between scalenus anterior and medius
|
| Trunks | - Located posterior to middle third of clavicle
- Upper and middle trunks related superiorly to the subclavian artery
- Lower trunk passes over 1st rib posterior to the subclavian artery
|
| Divisions | Apex of axilla |
| Cords | Related to axillary artery |
Diagram illustrating the branches of the brachial plexus
Cutaneous sensation of the upper limb
