After completing this study unit you will be able to:
- Identify the two main parts of the brachial plexus.
- Name the structures (roots, trunks, divisions, cords) that form the brachial plexus.
- Name the lateral and terminal branches of the brachial plexus and their supply areas.
The brachial plexus is a network of nerves originating in the neck region, passing between the anterior and middle scalene muscles. It passes through the axilla where many peripheral nerves arise that course through the upper limb to innervate the muscles, joints and skin. It can be divided into two main parts: supraclavicular and infraclavicular. The supraclavicular part (roots and trunks with their branches) of the brachial plexus is located in the posterior triangle of the neck, while its infraclavicular part (cords and their branches) is in the axilla. The brachial plexus gives off lateral branches (anterior and posterior) and five major terminal branches.
This video tutorial will provide you with an overview of the brachial plexus.
Learning the anatomy of the brachial plexus can be a real challenge, but no worries, we have prepared a video with a number of mnemonics that will help you memorize all structures of the brachial plexus.
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Download the following PDF worksheets in order to learn all the parts of the brachial plexus.
Now you can take a closer look at the components of the brachial plexus with our image gallery:
|Roots||C5, C6, C7, C8, T1|
Trunks: Superior, middle, inferior
Divisions: Three anterior and three posterior
Cords: Posterior, lateral and medial
|Supraclavicular preterminal branches||Dorsal scapular nerve, suprascapular nerve, long thoracic nerve and subclavian nerve|
|Infraclavicular preterminal branches||Lateral pectoral nerve, medial pectoral nerve, medial cutaneous nerve of the arm, medial cutaneous nerve of the forearm, upper subscapular nerve, thoracodorsal nerve and lower subscapular nerve.|
|Terminal branches||Musculocutaneous nerve, axillary nerve, median nerve, radial nerve, ulnar nerve|
|Function||Complete sensory and motor innervation of the arm|
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