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Nerves- Upper limb

Anatomy of the upper limb nerves

QuestionAnswer
Brachial plexus Path: passes lat and ant over 1st rib into the axilla Parts of the plexus: Roots>Trunks>Divisions>Cords>Branches
Roots of the brachial Anterior rami of C5-8 and most of T1
Trunks of the brachial plexus Superior: C5-6 Middle: C7 Inferior: C8 and T1
Divisions of the brachial plexus Anterior and posterior division of each of the 3 trunks.
Cords of the brachial plexus Lateral cord: union of ant divisions of the superior and middle trunk (C5-7) Medial cord: from anterior division of the inferior trunk (C8-T1) Posterior cord: union of all 3 posterior divisions (C5-T1)
Dorsal scapular nerve Origin: C5 Innervates: Rhomboid major and minor Action: Retract and elevates the scapula Test: Pt places hand in small of back and then lifts hand away. Palpate for rhomboid activity.
Long thoracic nerve Origin: C5-7 Innervates: Seratus anterior Action:Protraction and upward rotation of scapula Test: Pt performs a modified push up against the wall
Suprascapular Origin: C5-6 (Superior trunk) Innervates: Supraspinatus and infraspinatus Action:Abducts and laterallr rotates shoulder Test: ???????Empty can test???cross adduction test
Subclavius nerve Origin: C5-6 (Superior trunk) Innervates:Subclavius Action: Depressess clavical/ elevates 1st rib Test:
Lateral pectoral nerve Origin: C5-7 (lateral cord) Innervates: Pec major Action: Add, med rotates and flexes shoulder, protracts scapula Test:
Musculocutaneous nerve Origin: C8 T1 (Lateral cord) Innervates: Coracobrachialis, Biceps brachii, and Brachialis plus the skin on lateral forearm Action:Elbow flexion Test:resisted elbow flexion and cutaneous sensation
Medial pectoral nerve Origin: C8 T1 (medial cord) Innervates: Pec major and minor Action:add, med rotates and flexes shoulder, protracts and depresses scapula, evlevation of ribs 3-5. Test:
Medial cutaneous nerve of the arm Origin: C8 T1 Innervates: medial distal arm
Medial cutaneous nerve of the forearm Origin: C8-T1 (medial cord) Innervates: Skin on medial forearm
Median nerve Origin: C5-6 T1 ( medial and lateral cord) Innervates: Motor-Muscles of ant forearm (except flexor carpi ulnaris), thenar muscles of the thumb an lateral lumbricals Sesory- lateral hand Action: Test:
Ulnar nerve Origin: C7-8 T1 Innervates:
Created by: Lisa Marie Boden Lisa Marie Boden on 2010-08-24



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