Musculocutaneous Nerve, N462 Notes, Anatomy, Upper Limb, Neurovasculature

Musculocutaneous nerve (C5, C6, C7)

1. Pierces the coracobrachialis muscle, descends between the biceps brachii and brachialis muscles, and innervates these three muscles.
2. From the Lateral Cord of the Brachial Plexus
3. Articular Branch 
4. The Lateral Antebrachial Cutaneous Nerve has an Anterior and Posterior Branch

Musculocutaneous Nerve, N462 Notes, Anatomy, Upper Limb, Neurovasculature

Musculocutaneous Nerve, N462 Notes, Anatomy, Upper Limb, Neurovasculature

Musculocutaneous nerve (C5, C6, C7)

1. Pierces the coracobrachialis muscle, descends between the biceps brachii and brachialis muscles, and innervates these three muscles.
2. From the Lateral Cord of the Brachial Plexus
3. Articular Branch 
4. The Lateral Antebrachial Cutaneous Nerve has an Anterior and Posterior Branch

Musculocutaneous Nerve, N462 Notes, Anatomy, Upper Limb, Neurovasculature

Arteries and Nerves of Upper Arm, N461 Notes, Anatomy, Upper Limb, Neurovasculature

Arteries and Nerves of Upper Arm, N461 Notes, Anatomy, Upper Limb, Neurovasculature:

1. Arteries and anastomosis are not labeled
2. Ulnar Nerve, Medial and Radial Nerves
3. Musculocutaneous Nerve
4. Intercostobrachial Nerve
5. Muscles
1. Pronator Teres has a Ulnar Head and a Humeral Head
2. The Brachial Artery Splits into Radial and Ulnar Branch on the Tendon of Biceps Brachii
3. The Supinator Muscle separates the Radial Nerves Superficial and Deep Branches
4. Neurovascular bundle is exposed after cutting flexor digitorum superficialis muscles, and lies on the Flexor Digitorum Profundus

Nerves of the left upper extremity. (Ulnar labeled at center left.)
Latin	nervus ulnaris
Gray's	subject #210 943
Innervates	flexor carpi ulnaris flexor digitorum profundis lumbrical muscles opponens digiti minimi flexor digiti minimi abductor digiti minimi interossei adductor pollicis
From	C8, T1 (branches off from Medial cord)
MeSH	Ulnar+nerve

Cutaneous Innervation of the Wrist and Hand, N460 Notes, Anatomy, Upper Limb, Neurovasculature

Cutaneous Innervation of the Wrist and Hand, N460 Notes, Anatomy, Upper Limb, Neurovasculature:

1. There are 4 Nerves to the hand not 3
1. Musculocutaneous
1. Medial Antebrachial Cutaneous Nerve
2. Lateral Antebrachial Cutaneous Nerve
2. Ulnar Nerve
1. Palmar Branch
2. Palmar Digital Branch
3. Dorsal Branch and 
3. Median Nerve
1. Palmar Branch
2. Palmar Digital Branch
4. Radial
1. Superficial Branch
2. Dorsal Digital Branches (Prox 2/3)
3. Posterior Antebrachial Cutaneous Nerve

Brachial Plexus Injury Notes

Brachial Plexus Injury

• Disease, trauma or excessive stretching (because of birth trauma) of the posterior triangle of the neck or axilla may damage brachial plexus
• Results in paralysis and anaesthesia in the distribution of the affected nerves
• Various terms used to describe the different lesions
• Erb's palsy affects areas supplied by nerves from superior part of the plexus
• Klumpke's palsy affects areas supplied by nerves from the inferior part

Brachial Plexus Injury

Brachial Plexus Injury

• Disease, trauma or excessive stretching (because of birth trauma) of the posterior triangle of the neck or axilla may damage brachial plexus
• Results in paralysis and anaesthesia in the distribution of the affected nerves
• Various terms used to describe the different lesions
• Erb's palsy affects areas supplied by nerves from superior part of the plexus
• Klumpke's palsy affects areas supplied by nerves from the inferior part