4 brachial plexus(1)(1).pdf

Brachial Plexus Dr: Ali Alaloosy  Brachial Plexus A complicated plexus formed at the root of the neck. It is formed in the posterior triangle of the neck by the union of the anterior rami of the 5th, 6th, 7th, 8th cervical and the 1st thoracic spinal nerves. It can be div...

Brachial Plexus Dr: Ali Alaloosy  Brachial Plexus A complicated plexus formed at the root of the neck. It is formed in the posterior triangle of the neck by the union of the anterior rami of the 5th, 6th, 7th, 8th cervical and the 1st thoracic spinal nerves. It can be divided into:  Roots  Trunks  Divisions  Cords Roots TRUNKS C5 UPPER TRUNK C6 C7 MIDDLE TRUNK C8 LOWER TRUNK T1 TRUNKS DIVISIONS CORDS Anterior UPPER LATERAL CORD Posterior Anterior MIDDLE POSTERIOR CORD Posterior Anterior MEDIAL CORD LOWER Posterior  The cords are named according to their relationship to the 2nd part of axillary artery. All cords are lateral to the 1st part of axillary artery  Branches of brachial plexus:  Branches of roots: 1. Dorsal scapular nerve 2. Long thoracic nerve  Branches of trunks: 1. Nerve to subclavius branches of upper 2. Suprascapular nerve trunk  No branches from divisions  Branches of cords:  Lateral cord: 1. Lateral pectoral nerve 2. Musculocutaneous nerve 3. Lateral root of median nerve  Medial cord: 1. Medial pectoral nerve 2. Medial cutaneous nerve of arm 3. Medial cutaneous nerve of forearm 4. Ulnar nerve 5. Medial root of median nerve  Posterior cord 1. Upper and lower subscapular nerves 2. Thoracodorsal nerve 3. Axillary nerve 4. Radial nerve