Nerves from the root:
The dorsal scapular nerve is the branch of the C5 root
and it innervates the rhomboid
major and minor muscles.
Rhomboid major and minor attaches the spinous
process to the medial border of the scapula.
A long thoracic nerve originating from the roots of C5, C6, and C7
innervates the serratus
anterior muscle which attaches to the ribs from the costal surface of
the scapula.
Nerves from the trunk:
Superior trunk:
1. Subclavius nerve – innervating the subclavius muscle which is present between the
scapula and the 1st rib.
2. suprascapular nerve – innervates the supraspinatus and infraspinatus muscle.
Divisions don’t have any nerve branches!
Nerves from the cords:
Terminal nerves of the cords: My Aunty Raped My
Uncle
1. Musculocutaneous – the
terminal branch of lateral cord
2. Axillary –
terminal branch of the posterior cord
3. Radial – the
terminal branch of the posterior cord
4. Median –
lateral and medial cord unite to form the median nerve
5. Ulnar – the
terminal branch of the medial cord.
Branch nerves of the lateral cord:
Musculocutaneous,
The lateral root of the median nerve,
The lateral pectoral nerve from the lateral cord
innervates the pectoralis
major muscle.
Branch nerves of the medial cord:
The medial root of the median nerve
Ulnar nerve
Medial pectoral nerve – innervates pectoralis major and minor
The medial cutaneous nerve of the arm/medial
brachial cutaneous nerve – skin
sensation to the arm
The medial cutaneous nerve of the forearm/medial
antebrachial cutaneous nerve – skin sensation to the forearm
Nerves from the
posterior cord: ULTRA
Upper subscapular nerve - subscapularis
muscle which is beneath the scapula, this muscle internally rotates the
humerus.
Lower subscapular – subscapularis
and the teres major muscle which medially rotates the Humerus.
Thoracodorsal – Lattismus dorsi which adducts, extends, and medially rotates the humerus, Radial
and Axillary nerve.
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