Brachial Plexus And Nerves Of Upper Limb (Infraclavicular And Supraclavicular Branches) Flashcards Preview

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Flashcards in Brachial Plexus And Nerves Of Upper Limb (Infraclavicular And Supraclavicular Branches) Deck (16):
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Lateral pectoral nerve Origin? Course? Innervates?

O: Side branch of lateral cord, receiving fibers from C5, C6, C7

Innervates: Primarily pectoralis major, but some lateral pectoral nerve fibers pass to pectoralis minor via branch to medial pectoral nerve.

1

Musculocutaneous nerve Origin? Course? Innervates?

O: Terminal branch of lateral cord, receiving fibers from C5-C7

Innervates: Muscle of anterior compartment of arm (coracobrachialis, biceps brachii, and brachialis); skin of lateral aspect of forearm.

2

Median nerve Origin? Course? Innervates?

O: Lateral root of median nerve is a terminal branch of lateral cord (C6, C7 fibers); medial root of median nerve is a terminal branch of medial cord (C8, T1 fibers)

Innervates: Muscles of anterior forearm compartment (except for flexor carpi ulnaris and ulnar half of flexor digitorum profundus), five intrinsic muscles in thenar half of palm and palmar skin.

3

Medial pectoral nerve Origin? Course? Innervates?

O: Side branches of medial cord, receiving fibers from C8 and T1

Innervates: Pectoralis minor and sternocostal part of pectoralis major

4

Medial cutaneous nerve of arm Origin? Course? Innervates?

O: Side branches of medial cord, receiving fibers from C8 and T1

Innervates: Skin on medial side of arm, as far distal as medial epicondyle of humerus and olecranon of ulna

5

Median cutaneous nerve of forearm Origin? Course? Innervates?

O: Side branches of medial cord, receiving fibers from C8 and T1

Innervates: Skin of medial side of forearm, as far distal as wrist

6

Ulnar nerve Origin? Course? Innervates?

O: Large terminal branch of medial cord, receiving fibers from C8, T1, and often C7

Innervates: Flexor carpi ulnaris and ulnar half of flexor digitorum profundus (forearm); most intrinsic muscles of hand medial to axial line of digit 4

7

Upper subscapular nerve Origin? Innervates?

O: Side branch of posterior cord, receiving fibers from C5

Innervates: Superior portion of subscapularis

8

Lower subscapular nerve Origin? Course? Innervates?

O: Side branch of posterior cord, receiving fibers from C6

Innervates: Inferior portion of subscapularis and teres major

9

Thoracodorsal nerve Origin? Course? Innervates?

O: Side branch of posterior cord, receiving fibers from C6-C8

Innervates: Latissimus dorsi

10

Axillary nerve Origin? Course? Innervates?

O: Terminal branch of posterior cord, receiving fibers from C5 and C6

Innervates: Glenohumeral joint; teres minor and deltoid muscles; skin of superolateral arm (over inferior part of deltoid)

11

Radial nerve Origin? Course? Innervates?

O: Larger terminal branch of posterior cord (largest branch of plexus), receiving fibers from C5-T1

Innervates: All muscles of posterior compartments of arm and forearm; skin of posterior and inferolateral arm, posterior forearm, and dorsum of hand lateral to axial line of digit 4

12

Dorsal scapular nerve Origin? Innervates?

O: Posterior aspect of anterior ramus of C5, frequent contribution of C4

Innervates: Rhomboids; occasionally supplies levator scapulae

13

Long thoracic nerve Origin? Innervates?

O: Posterior aspect of anterior rami of C5,C6,C7

Innervates: Serratus Anterior

14

Suprascapular Origin? Innervates?

O: Superior trunk, receiving fibers from C5,C6 often C4

Innervates: Supraspinatus and infraspinatus; glenohumeral joint

15

Subclavian nerve Origin? Innervates?

O: Superior trunk C5,C6, often C4

Innervates: Subclavius and sternoclavicular joint