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Upper Limb > Brachial Plexus and Nerves of the Upper Limb > Flashcards

Brachial Plexus and Nerves of the Upper Limb Flashcards

0
Q

What is the origin of the dorsal scapular nerve?

A

Posterior aspect of anterior ramus of C5 with frequent contribution from C4

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1
Q

What nerves make up the supraclavicular branch of the brachial plexus?

A

Dorsal scapular, long thoracic, suprascapular, and subclavian

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2
Q

What structures does the dorsal scapular nerve innervate?

A

Rhomboids and sometimes levator scapulae

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3
Q

What is the origin of the long thoracic nerve?

A

Posterior aspect of anterior rami of C5, C6, C7

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4
Q

What structures are innervated by the long thoracic nerve?

A

Serratus anterior

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5
Q

What is the origin of the suprascapular nerve?

A

Superior trunk receiving fibers from C5, C6 and oftern C4

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6
Q

What structures are innervated by the suprascapular nerve?

A

The supraspinates and infraspinatus; essentially the glenohumeral joint

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7
Q

What is the origin of the subclavian nerve?

A

Superior trunk receiving fibers from C5, C6, and often C4

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8
Q

What is the origin of the lateral pectoral nerve?

A

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

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9
Q

What structures are innervated by the lateral pectoral nerve?

A

Primarliy pectoralis major but some nevre fibers pass to pectoralis minor via medial pectoral nerve

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10
Q

What is the origin of the musculocutaneous nerve?

A

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

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11
Q

What structures are innervated by the musculocutaneous nerve?

A

Muscles of the anterior compartment of the arm (coracobrachialis, biceps brachii, and brachialis) and skin of lateral aspect of forearm

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12
Q

What is the origin of the median nerve?

A

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

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13
Q

What structures are innervated by the median nerve?

A

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

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14
Q

What is the origin of the medial pectoral nerve?

A

Side branches of medial cord, receiving fibers from C8, T1

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15
Q

What structures are innervated by medial pectoral nerve?

A

Pectoralis minor and sternocostal part of pectoralis major

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16
Q

What is the origin of the medial cutaneous nerve of arm?

A

Side branches of medial cord, receiving fibers from C8, T1

17
Q

What structures are innervated by the medial cutaneous nerve of arm?

A

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

18
Q

What is the origin of the median cutaneous nerve of forearm?

A

Side branches of medial cord, receiving fibers from C8, T1

19
Q

What structures are innervated by median cutaneous nerve of forearm?

A

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

20
Q

What is the origin of the ulnar nerve?

A

Larger terminal branch of medial cord, receiving fibers from C8, T1, and often C7

21
Q

What structures are innervated by the ulnar nerve?

A

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

22
Q

What is the origin of the upper subscapular nerve?

A

Side branches of posterior cord, receiving fibers from C5

23
Q

What structures are innervated by upper subscapular nerve?

A

Superior portion of subscapularis

24
Q

What is the origin of the lower subscapular nerve?

A

Side branch of posterior cord, receiving fibers from C6

25
Q

What structures are innervated by lower subscapular nerve?

A

Inferior portion of subscapularis and teres major

26
Q

What is the origin of the thoracodorsal nerve?

A

Side branch of posterior cord, receiving fibers from C6, C7, C8

27
Q

What structures are innervated by the thoracodorsal nerve?

A

Latissimus dorsi

28
Q

What is the origin of the axillary nerve?

A

Terminal branch of posterior cord, receiving fibers from C5, C6

29
Q

What structures are innervated by the axillary nerve?

A

Glenohumeral joint, teres minor, and deltoid muscles, also skin of superolateral arm over inferior part of deltoid

30
Q

What is the origin of the radial nerve?

A

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

31
Q

What structures are innervated by the radial nerve?

A

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 digiti 4

32
Q

What is the origin of the anterior interosseous nerve?

A

Median nerve in distal part of cubital fossa

33
Q

What is the origin of the palmar cutaneous branch of median nerve?

A

Median nerve of middle to distal forearm, proximal to flexor retinaculum

34
Q

What is the origin of the palmar cutaneous branch of ulnar nerve?

A

Ulnar nerve near middle forearm

35
Q

What is the origin of the dorsal cutaneous branch of ulnar nerve?

A

Ulnar nerve in distal half of forearm

36
Q

What is the origin of the posterior cutaneous nerve of forearm?

A

Radial nerve, as it traverses radial groove of posterior humerus

37
Q

What is the origin of the superficial branch of radial nerve?

A

Sensory terminal branch of radial nerve, in cubital fossa

38
Q

What is the origin of the deep branch of radial nerve/posterior interosseous nerve?

A

Motor terminal branch of radial nerve, in cubital fossa

39
Q

What is the origin of the lateral cutaneous nerve of forearm?

A

Continuation of musculocutaneous nerve distal to muscular branches

40
Q

What is the origin of the medial cutaneous nerve of forearm?

A

Medial cord of brachial plexus, receiving C8 and T1 fibers

Upper Limb (18 decks)

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