upper limb muscles Flashcards Preview

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Flashcards in upper limb muscles Deck (43):
1

Pectoralis major

PA
1. Clavicular head
-medial 1/2 of clavicle


2. Sternocostal head
-sternum
-costal cartilages (1-6)
-aponeurosis of external abdominal oblique

DA
-lateral lip of the intertubercular sulcus of the humerus

Nerve
medial and lateral pectoral nerves (C6 - C8)

Artery
Thoracoacromial

Action
-flexion, adduction, medial rotation of humerus

2

Pectoralis minor

Proximal:
Ribs 3-5 near their costal cartilages

Distal:
Coracoid process

Nerve:
Medial pectoral nerve (C8, T1)

Artery:
Thoracoacromial artery

Action:
Draws glenoid cavity anteriorly and inferiorly

3

Subclavius

Proximal:
1st rib

Distal:
Clavicle

Nerve:
Nerve to subclavius (C5)

Artery:
Thoracoacromial artery

Action:
Depresses the clavicle

4

Serratus anterior

Proximal:
Upper 8 ribs

Distal:
Costal aspect of the medial margin of the scapula

Nerve:
Long thoracic nerve (C5, C6, C7)

Artery:
Lateral thoracic artery
Thoracodorsal artery

Action:
Protracts and stabilizes the scapula Assists in upward rotation

5

Deltoid

Proximal:
Spine of the scapula
Acromion Lateral 1/3 of the clavicle

Distal:
Deltoid tuberosity

Artery:
Posterior circumflex humeral artery

Nerve:
Axillary nerve (C5)

Action:
Abduction of the humerus

6

Teres Major

Proximal:
Inferior angle of the scapula

Distal:
Medial lip of the intertubercular sulcus of the humerus

Artery:
Circumflex scapular artery
Subscapular artery

Nerve:
Subscapular nerve (C5)

Action:
Adduction of the humerus Medial rotation of the humerus

7

Teres minor

Proximal:
Lateral border of the scapula

Distal:
Inferior facet of the greater tubercle

Artery:
Posterior circumflex humeral artery
Circumflex scapular artery

Nerve:
Axillary nerve (C5) Action: Lateral rotation of the humerus

8

Supraspinatus

Proximal:
Supraspinous fossa

Distal:
Superior facet of the greater tubercle

Artery:
Suprascapular artery

Nerve:
Suprascapular nerve (C5)

Action:
Abduction of the humerus

9

Infraspinatus

Proximal:
Infraspinous fossa

Distal:
Middle facet of the greater tubercle

Artery:
Circumflex scapular artery
Suprascapular artery

Nerve:
Supracapular nerve (C5)

Action:
Lateral rotation of the humerus

10

Biceps brachii

Proximal:
Short head – coracoid process of the scapula
Long head – supraglenoid tubercle of the scapula

Distal:
Radial tuberosity

Nerve:
Musculocutaneous nerve (C6)

Artery:
Brachial artery

Action:
Supination of the forearm Flexion of the forearm

11

Coracobrachialis

Proximal:
Coracoid process

Distal:
Medial side of the shaft of the humerus

Nerve:
Musculocutaneous nerve (C6)

Artery:
Brachial artery

Action:
Adduction of the humerus Flexion of the humerus

12

Brachialis

Proximal:
Anterior surface of the distal ½ of the humerus

Distal:
Coronoid process of the ulna

Nerve:
Musculocutaneous nerve (C5, C6)
Radial nerve (C5, C7)

Artery:
Radial recurrent artery Action: Flexion of the forearm

13

Brachioradialis

Proximal:
Lateral surface of the distal humerus

Distal:
Styloid process of the radius

Nerve: Radial nerve

Artery: Radial recurrent artery

Action: Flexion of the forearm

14

Pronator teres

Proximal:
Common flexor tendon

Distal: Middle of the lateral surface of the radius

Nerve: Median nerve (C7)

Artery:
Ulnar artery
Radial artery

Action:
Pronation of the hand
Flexion of the forearm

15

Flexor carpi radialis

Proximal:
Common flexor tendon

Distal: Base of the 2nd metacarpal bone

Nerve: Median nerve (C7)

Artery: Ulnar artery

Action: Flexion of the hand Abduction of the hand

16

Palmaris longus

Proximal:
Common flexor tendon

Distal: Palmar aponeurosis

Nerve: Median nerve (C7, C8)

Artery: Ulnar artery

Action: Flexion of the hand

17

Flexor carpi ulnaris

Proximal:
Common flexor tendon

Distal:
Pisiform bone
Hamate bone
Base of the 5th metacarpal bone

Nerve: Ulnar nerve (C8)

Artery: Ulnar artery

Action: Flexion of the hand Adduction of the hand

18

Flexor digitorum superficialis

Proximal:
Common flexor tendon
Radius
Ulna

Distal: Middle phalanges of digits 2-5

Nerve: Median nerve (C7-T1)

Artery: Ulnar artery

Action: Flexion of middle phalanges of digits 2-5

19

Flexor digitorum profundus

Proximal:
Anterior surface of the ulna
Interosseous membrane

Distal:
Distal phalanges of digits 2-5

Nerve: Median nerve(lateral ½ of the muscle) (C8)
Ulnar nerve (medial ½ of the muscle) (T1)

Artery: Anterior interosseous artery

Action: Flexion of digits 2-5

20

Flexor pollicis longus

Proximal:
Anterior surface of the radius
Interosseous membrane

Distal: Distal phalanx of the thumb

Nerve: Anterior interosseous nerve (C8)

Artery: Anterior interosseous artery

Action: Flexion of the thumb

21

Pronator quadratus

Proximal and distal Transversely b/w distal ¼ of the radius and ulna

Nerve: Anterior interosseous nerve (C8)

Artery: Anterior interosseous artery

Action: Pronation of the hand

22

Palmaris brevis

Proximal: Flexor retinaculum

Distal: Skin of the hypothenar eminence

Nerve: Superficial branch of the ulnar nerve

Action: Pulls on skin over hypothenar eminence

23

Abductor pollicis brevis

Proximal:
Scaphoid
trapezium
flexor retinaculum

Distal: Lateral side of the proximal phalanx of the thumb

Nerve: Recurrent branch of the median nerve (C8)

Artery: Superficial palmar arch

Action: Abduction of the thumb

24

Flexor pollicis brevis

Proximal:
Scaphoid
trapezium
flexor retinaculum

Distal: Lateral side of the proximal phalanx of the thumb

Nerve: Recurrent branch of the median nerve (C8)

Artery: Superficial palmar arch

Action: Flexion of the thumb

25

Opponens pollicis muscle

Proximal:
Scaphoid
trapezium
flexor retinaculum

Distal: Entire lateral side of the 1st metacarpal

Nerve: Recurrent branch of the median nerve (C8)

Artery: Superficial palmar arch

Action: Opposition of the thumb

26

Abductor digiti minimi

Proximal:
Pisiform
hamate
flexor retinaculum

Distal: Base of the proximal phalanx of the 5th digit

Nerve: Deep branch of the ulnar nerve (T1)

Artery: Ulnar artery

Action: Abduction of the 5th digit

27

Flexor digiti minimi brevis

Proximal:
Pisiform, hamate, flexor retinaculum

Distal: Base of the proximal phalanx of the 5th digit

Nerve: Deep branch of the ulnar nerve (T1)

Artery: Ulnar artery

Action: Flexion of the 5th digit

28

Opponens digiti minimi

Proximal:
Pisiform, hamate, flexor retinaculum

Distal: Entire medial border of the 5th metacarpal

Nerve: Deep branch of the ulnar nerve (T1)

Artery: Ulnar artery

Action: Opposition of the 5th digit

29

Lumbrical

Proximal: Tendons of the flexor digitorum profundus muscle

Distal: Radial side of the extensor expansions of digits 2-5

Nerve:
Lumbricals 1 and 2 – median nerve (T1)
Lumbricals 3 and 4 – deep branch of the ulnar nerve (T1)

Action: Flexion of the MCP joints Extension of the PIP and DIP joints

30

Adductor pollicis

Proximal:
Transverse head – anterior surface of shaft of 3rd metacarpal
Oblique head – bases of 2nd and 3rd metacarpals and associated carpal bones

Distal: Medial side of the base of the proximal phalanx of the thumb

Nerve: Deep branch of the ulnar nerve (T1)

Artery: Deep palmar arch

Action: Adduction of the thumb

31

Palmar interosseous

Proximal: Metacarpals of digits 2,4,5

Distal: Base of the proximal phalanx and extensor expansions of digits 2,4,5

Nerve: Deep branch of the ulnar nerve (T1)

Action: Adduction of digits 2,4,5 (“PAD”)

32

Dorsal interosseous

Proximal: Metacarpals of digits 1-5

Distal: Base of the proximal phalanx and extensor expansions of digits 2-4

Nerve: Deep branch of the ulnar nerve (T1)

Action: Abduction of digits 2-4 (“DAB”)

33

Triceps brachii

Proximal:
Long head – infraglenoid tubercle
Lateral head – posterior surface of humerus (superior to radial groove)
Medial head – posterior surface of humerus (inferior to radial groove)

Distal: Olecranon Nerve: Radial nerve (C7, C8)

Axillary nerve (lateral head)

Artery: Deep artery of the arm

Action: Extension of the forearm

34

Extensor carpi radialis longus

Proximal: Lateral supracondylar ridge of the humerus

Distal: Base of the 2nd metacarpal

Nerve: Deep branch of the radial nerve

Artery: Radial artery

Action: Extension of the wrist Abduction of the wrist

35

Extensor carpi radialis brevis

Proximal: Common extensor tendon

Distal: Base of the 3rd metacarpal

Nerve: Deep branch of the radial nerve

Artery: Radial artery

Action: Extension of the wrist Abduction of the wrist

36

Extensor digitorum

Proximal: Common extensor tendon

Distal: Extensor expansions of digits 2-5

Nerve: Deep branch of the radial nerve

Artery: Posterior interosseous artery

Action: Extension of the wrist Extension of the fingers

37

Extensor digiti minimi

Proximal: Common extensor tendon

Distal: Extensor expansion of 5th digit

Nerve: Deep branch of the radial nerve

Artery: Posterior interosseous artery

Action: Extension of the 5th digit

38

Extensor carpi ulnaris

Proximal: Common extensor tendon

Distal: Base of the 5th metacarpal

Nerve: Deep branch of the radial nerve

Artery: Ulnar artery

Action:
Extension of the wrist
Adduction of the wrist

39

Abductor pollicis longus

Proximal: Radius, ulna, interosseous membrane

Distal: Base of the 1st metacarpal

Nerve: Posterior interosseous nerve

Artery: Posterior interosseous artery

Action: Abduction of the thumb

40

Extensor pollicis brevis

Proximal: Radius, ulna, interosseous membrane

Distal: Base of the proximal phalanx of the thumb

Nerve: Posterior interosseous nerve

Artery: Posterior interosseous artery

Action: Extension of the thumb

41

Extensor pollicis longus

Proximal: Radius, ulna, interosseous membrane

Distal: Base of the distal phalanx of the thumb

Nerve: Posterior interosseous nerve

Artery: Posterior interosseous artery

Action: Extension of the thumb

42

Extensor indicis

Proximal: Radius, ulna, interosseous membrane

Distal: Extensor expansion of 2nd digit (index finger)

Nerve: Posterior interosseous nerve

Artery: Posterior interosseous artery

Action: Extension of the 2nd digit (index finger)

43

Supinator

Proximal:
Lateral epicondyle of the humerus
Radial collateral ligament
Anular ligament
Lateral surface of the ulna

Distal: Proximal 1/3 of the radius

Nerve: Deep branch of the radial nerve

Artery: Radial recurrent artery

Action: Supination of the hand