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Foundations > Pectoral & Upper Limb Muscles > Flashcards

Pectoral & Upper Limb Muscles Flashcards

1
Q

Pectoralis major

Origin

A
  • Clavicular head: Medial one half of the clavicle

- Sternocostal head: Sternum, & Costal cartilage 1-7

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2
Q

Pectoralis major

Insertion

A

Lateral lip of the intertubercular sulcus of humerus

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3
Q

Pectoralis major

Action

A
  1. Medially rotates the humerus
  2. Flexes the humerus
  3. ** Adducts the humerus
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4
Q

Pectoralis major

Innervation & blood supply

A

Innervation: Medial and lateral pectoral nerves
(from C8-T1 and C5-C7 of brachial plexus, respectively)

Blood supply: Pectoral branch of the thoracoacromial artery

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5
Q

Pectoralis minor

Origin

A

Ribs 3-5

near costal cartilage

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6
Q

Pectoralis minor

Insertion

A

Coracoid process of the scapula

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7
Q

Pectoralis minor

Action

A
  1. Anteriorly tilts and depresses the scapula

2. Elevates ribs for deep inspiration

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8
Q

Pectoralis minor

Innervation and blood supply

A

Innervation: Medial pectoral nerve (from C8-T1 of brachial plexus)

Blood supply: Pectoral branch of the thoracoacromial artery

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9
Q

Subclavius

Origin

A

Rib 1

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10
Q

Subclavius

insertion

A

Clavicle

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11
Q

Subclavius

Action

A
  • Depresses the clavicle

- Stabilizes the sternoclavicular joint

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12
Q

Subclavius

Innervation and blood supply

A

Innervation: Nerve to subclavius

Blood supply: Clavicular branch of the thoracoacromial artery

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13
Q

Serratus anterior

Origin

A

Medial border of the scapula (anterior surface)

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14
Q

Serratus anterior

Insertion

A

Ribs 1-9, lateral parts

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15
Q

Serratus anterior

Action

A
  • Protects and rotates the scapula
  • Holds scapula against thoracic wall
    (esp. when reaching anteriorly)
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16
Q

Serratus anterior

Innervation and blood supply

A

Innervation: Long thoracic nerve (brachial plexus)

Blood supply: Lateral thoracic artery

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17
Q

Subscapularis

Origin

A

Subscapular fossa

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18
Q

Subscapularis

Insertion

A

Lesser tubercle of the humerus

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19
Q

Subscapularis

Action

A

Medially rotates the humerus

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20
Q

Subscapularis

Innervation & blood supply

A

Innervation: upper and lower subscapular nerves (C5 and C6 of brachial plexus, respectively)

Blood supply: subscapular artery

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21
Q

Coracobrachialis

Origin

A

Coracoid process of the scapula

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22
Q

Coracobrachialis

Insertion

A

Medial side of the shaft of the humerus

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23
Q

Coracobrachialis

Action

A

Adducts and flexes the humerus

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24
Q

Coracobrachialis

Innervation and blood supply

A

Innervation: Musculocutaneous nerve (ventral rami of C5, C6)

Blood supply: Muscular branches of brachial artery

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25
Q

Biceps brachii

Origin

A

Long head: Supraglenoid tubercle of the scapula

Short head: Coracoid process of the scapula

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26
Q

Biceps brachii

Insertion

A
  • Radial tuberosity and antebrachial fascia

Connects via bicipital aponeurosis

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27
Q

Biceps brachii

Action

A

Supinates and flexes the forearm

- POWERFUL

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28
Q

Biceps brachii

Innervation and blood supply

A

Innervation: Musculocutaneous nerve (c5,c6)

Blood supply: muscular branches of brachial artery

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29
Q

Brachialis

Origin

A

Anterior aspect of the humerus

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30
Q

Brachialis

Insertion

A

Tuberosity of the ulna

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31
Q

Brachialis

Action

A

Flexes the forearm

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32
Q

Brachialis

Innervation and blood supply

A

Innervation: Musculocutaneous nerve (ventral rami of C5, C6)

Blood supply: Muscular branches of brachial artery

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33
Q

Joints of the upper limb

A
  • Acromioclavicular (AC) joint (gliding)
  • Glenohumeral (shoulder) joint (ball & socket)
  • Elbow (humeroulnar) Joint (Hinge)
  • Superior and inferior radioulnar joints (pivot)
  • Radiocarpal (wrist) joint (Condyloid)
  • Metacarpophalangeal joint (Condyloid)
  • Proximal interphalageal joint (hinge)
  • Distal interphalageal joint (hinge)
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34
Q

Winged Scapula

A

When a patient extends arm, medial border of scapula is visible through skin when long thoracic nerve is damaged
- Serratus anterior cannot hold scapula to thoracic wall

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35
Q

Types of shoulder disocations

A

These are all glenohumeral joint dislocations

  1. Subcoracoid dislocation
  2. Subglenoid dislocation
  3. Subclavicular dislocation
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36
Q

What are the rotator cuff muscles?

A
  1. Supraspinatus
  2. Infraspinatus
  3. Subscapularis
  4. Teres minor
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37
Q

Deltoid

Origin

A
  • Clavicular part: Lateral 1/3 of the clavicle
  • Acromial part: Acromion process of scapula
  • Spinal part: Spine of scapula
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38
Q

Deltoid

Insertion

A

Deltoid tuberosity of the humerus

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39
Q

Deltoid

Action

A

Clavicular part: Flexes, internally rotates
Acromial part: Abducts the humerus
Spinal part: Extends and externally rotates the humerus

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40
Q

Deltoid

Innervation and Blood Supply

A

Innervation: Axillary nerve (brachial plexus)

Blood supply: Posterior Circumflex Humeral Artery

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41
Q

Brachioradialis

Origin

A

Lateral supracondylar ridge of the humerus

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42
Q

Brachioradialis

Insertion

A

Styloid process of the radius

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43
Q

Brachioradialis

Action

A
  • Flexes elbow from mid-prone position

“The drinking muscle”

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44
Q

Brachioradialis

Innervation and Blood Supply

A

Innervation: Radial nerve

Blood supply: Radial recurrent artery

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45
Q

Triceps brachii

Origin

A

Long head: Infraglenoid tubercle of the scapula

Medial/Lateral head: Posterior surface of the humerus

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46
Q

Triceps brachii

Insertion

A

Olecranon process of the ulna

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47
Q

Triceps brachii

Action

A

Extends the forearm

Long head: Extends & adducts the arm

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48
Q

Triceps brachii

Innervation & Blood supply

A

Innervation: Radial nerve (C6, C7, C8)

Blood supply: Deep brachial artery

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49
Q

Carpal bones

A
  • Scaphoid
  • Lunate
  • Triquetrum
  • Pisiform
  • Hamate
  • Capitate
  • Trapezoid
  • Trapezium
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50
Q

Anterior forearm muscles (superficial)

A

From lateral to medial:

  • Pronator teres
  • Flexor carpi radialis
  • Palmaris longus
  • Flexor carpi ulnaris

Pass-Fail-Pass-Fail

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51
Q

Anterior forearm muscles (superficial)

Innervation

A

Median nerve

EXCEPT for flexor carpi ulnaris (which is ulnar nerve)

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52
Q

Anterior forearm muscles (intermediate) & Innervation

A
  • Flexor digitorum superficialis (travels through carpal tunnel to palm)

Innervation: Median nerve

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53
Q

Anterior forearm muscles (deep group)

A
  • Flexor digitorum profundus (travels through carpal tunnel to palm)
  • Flexor pollicis longus (travels through carpal tunnel to palm)
  • Pronator quadratus
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54
Q

Anterior forearm muscles (deep group)

Innervations

A
  • Flexor digitorum profundus: Medial part is ulnar neve, Lateral part: median nerve
  • Flexor pollicis longus: Median nerve
  • Pronator quadratus: Median nerve
  • Flex DIP usually
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55
Q

Posterior forearm muscles (superficial group)

A
  • Extensor carpi radialis longus
  • Extensor carpi radialis brevus
  • Extensor digitorum
  • Extensor digiti minimi
  • Extensor carpi ulnaris
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56
Q

Posterior forearm muscles (deep group)

A
  • Abductor pollicis longus (acts on thumb)
  • Extensor pollicis brevis (acts on thumb)
  • Extensor pollicis longus (acts on thumb)
  • Extensor indicis
  • Supinator

ABLEs

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57
Q

Thenar eminence muscles (thumb)

A
  • Abductor pollicis
  • Flexor pollicis brevis
  • Opponens pollicis
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58
Q

Palmar aponeurosis (what is it? Location?)

A

Deep fascia, longitudinal fibrous sheaths from digits 2-5

- Connects to palmaris longus tendon

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59
Q

Adductor pollicis

  • Origin
  • Insertion
  • Action
  • Innervation
A

NOT part of thenar eminence

  • Transverse head is from shaft of metacarpal 3, Oblique head is from capitate bone, bases of metacarpals 2-3
  • Base of proximal phalynx of thumb
  • Adducts thumb
  • Ulnar nerve (deep branch)
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60
Q

Hypothenar eminience muscles (little finger)

A
  • Abductor digiti minimi
  • Flexor digiti minimi brevis
  • Opponens digiti minimi
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61
Q

Lumbrical muscle

  • Origin
  • Insertion
  • Action
  • Innervation
A
  • Tendons of flexor digitorum profundus
  • Lateral sides of the dorsal digital expansions of the tendons of extensor digitorum muscles
  • Flexes MCP joint, Extends DIP and PIP joint
  • Innervation: 1-2 are median nerve (lateral side); 3-4 are ulnar nerve
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62
Q

Dorsal interosseus muscles

  • Origins
  • Insertions
  • Actions
  • Innervations
A

There are 4 of them

  • Origins: Between digits 1&2, 2&3, 3&4, 4&5
  • Insertions: lateral side of digit 2, 3; medial side of digit 3,4
  • Actions: abducts digits 2-4 away from axis of middle finger, Flex MCP joints, Help extend PIP and DIP joints
  • Innervation: Ulnar nerve
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63
Q

Palmar interosseus muscles

  • Origins
  • Insertions
  • Actions
  • Innervations
A

There are 3 of them

  • Origins: Medial side of metacarpal 2, Lateral side of metacarpal 4, Lateral side of metacarpal 5
  • Insertions: Medial side of digit 2, lateral side of digit 4, lateral side of digit 5
  • Actions: ADducts digits 2-4 towards the axis of middle finger, Flex MCP joints, Help extend PIP and DIP joints
  • Innervation: Ulnar nerve
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64
Q

Function of Acromioclavicular joint

A

Doesn’t normally move (helps lift arm over head), can be affected by muscles when AC is broken

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65
Q

Function of radioulnar joints

A

Participate in supination and pronation of forearm

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66
Q

Pronator teres

Origin

A
  • Medial epicondyle/ supraepicondylar ridge of the humerus

- medial side of the coraNoid process

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67
Q

Pronator teres

Insertion

A

Lateral midshaft of radius

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68
Q

Pronator teres

Action

A

Pronates AND flexes the forearm

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69
Q

Pronator teres

Innervation

A

Median nerve

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70
Q

Pronator teres

Blood supply

A

Ulnar artery

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71
Q

Flexor carpi radialis

Origin

A

Medial epicondyle of the humerus

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72
Q

Flexor carpi radialis

Insertion

A

Base of metacarpals 2-3

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73
Q

Flexor carpi radialis

Action

A

Flexes AND abducts the wrist

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74
Q

Flexor carpi radialis

Innervation

A

Median nerve

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75
Q

Flexor carpi radialis

Blood supply

A

Ulnar artery

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76
Q

Palmaris longus

Origin

A

Medial epicondyle of the humerus

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77
Q

Palmaris longus

Insertion

A

Palmar aponeurosis

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78
Q

Palmaris longus

Innervation

A

Median nerve

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79
Q

Palmaris longus action

A

Flexes the wrist

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80
Q

Palmaris longus

Blood supply

A

Ulnar artery

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81
Q

Flexor carpi ulnaris

Origin

A

Medial epicondyle of humerus

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82
Q

Flexor carpi ulnaris

Insertion

A

Pisiform bone

Base of metacarpal 5

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83
Q

Flexor carpi ulnaris

Action

A

Flexes and ADucts wrist

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84
Q

Flexor carpi ulnaris

Innervation

A

Ulnar nerve

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85
Q

Flexor carpi ulnaris

Blood supply

A

Ulnar artery

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86
Q

Flexor digitorum superficialis

Origin

A

Medial epicondyle of the humerus

& oblique line of the radius

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87
Q

Flexor digitorum superficialis

Insertion

A

Middle phalanges of digits 2-5

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88
Q

Flexor digitorum superficialis

Action

A

Flexes PIP of digits 2-5

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89
Q

Flexor digitorum superficialis

Innervation

A

Median nerve

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90
Q

Flexor digitorum superficialis

Blood supply

A

Ulnar artery

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91
Q

Flexor digitorum profundus

Origin

A

Anterior and medial surface of the ulna and interosseous membrane

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92
Q

Flexor digitorum profundus

Insertion

A

Distal phalanges of digits 2-5

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93
Q

Flexor digitorum profundus

Action

A

Flexes DIP of digits 2-5

94
Q

Flexor digitorum profundus

Innervation

A

Lateral half: anterior interosseous nerve (median nerve)

Medial half: ulnar nerve

95
Q

Flexor digitorum profundus

Blood supply

A

Ulnar and anterior interosseous arteries

96
Q

Flexor pollicis longus

Origin

A

Anterior surface of the radius and interosseous membrane

97
Q

Flexor pollicis longus

Insertion

A

Base of distal phalanx of thumb

98
Q

Flexor pollicis longus

Action

A

Flexes IP of thumb

99
Q

Flexor pollicis longus

Innervation

A

Anterior interosseous branch of the median nerve

100
Q

Flexor pollicis longus

Blood supply

A

Anterior interosseous artery

101
Q

Pronator quadratus

Origin

A

Distal ulna

102
Q

Pronator quadratus

Insertion

A

Distal radius

103
Q

Pronator quadratus

Action

A

Pronates the forearm

104
Q

Pronator quadratus

Innervation

A

Anterior interosseous branch of median nerve

105
Q

Pronator quadratus

Blood supply

A

Anterior interosseous artery

106
Q

Palmaris brevis

Origin

A

Medial aspect of the palmar aponeurosis

107
Q

Palmaris brevis

Insertion

A

Skin over hypothenar eminence

108
Q

Palmaris brevis

Action

A

Wrinkles skin of medial palm

109
Q

Palmaris brevis

Innervation

A

Ulnar nerve

110
Q

Palmaris brevis

Blood supply

A

Superficial palmar arterial arch

111
Q

Abductor pollicis brevis

Origin

A
  • transverse carpal ligament
  • tubercle of scaphoid and trapezium

Part of thenar eminence

112
Q

Abductor pollicis brevis

Insertion

A

Lateral side, base of proximal phalanx of thumb

113
Q

Abductor pollicis brevis

Action

A

Abducts the thumb

114
Q

Abductor pollicis brevis

Innervation

A

Recurrent branch of the median nerve

115
Q

Abductor pollicis brevis

Blood supply

A

Superficial palmar branch of radial artery

116
Q

Flexor pollicis brevis

Origin

A
  • transverse carpal ligament
  • tubercle of scaphoid and trapezium

Part of thenar eminence

117
Q

Flexor pollicis brevis

Insertion

A

Lateral side, base of proximal phalanx of thumb

118
Q

Flexor pollicis brevis

Action

A

Flexes thumb

119
Q

Flexor pollicis brevis

Innervation

A

Recurrent branch of median nerve

120
Q

Flexor pollicis brevis

Blood supply

A

Superficial palmar branch of radial artery

121
Q

Opponens pollicis

Origin

A
  • transverse carpal ligament
  • tubercle of scaphoid and trapezium

Part of thenar eminence

122
Q

Opponens pollicis

Insertion

A

Lateral side of shaft of the first metacarpal bone

123
Q

Opponens pollicis

Action

A

Rotates the first metacarpal towards the palm

124
Q

Opponens pollicis

Innervation

A

Recurrent branch of the median nerve

125
Q

Opponens pollicis

Blood supply

A

Superficial palmar branch of the radial artery

126
Q

Abductor digiti minimi

Origin

A

Pisiform, hamate, and transverse carpal ligament

  • part of hypOthenar eminence
127
Q

Abductor digiti minimi

Insertion

A

Medial side of base of the proximal phalanx of digit 5

128
Q

Abductor digiti minimi

Action

A

Abducts digit 5

129
Q

Abductor digiti minimi

Innervation

A

Ulnar nerve

130
Q

Abductor digiti minimi

Blood supply

A

Deep palmar branch of the Ulnar artery

131
Q

Flexor digiti minimi brevis

Origin

A

Pisiform, hamate, and transverse carpal ligament

  • part of hypOthenar eminence
132
Q

Flexor digiti minimi brevis

Insertion

A

Volar side of base of the proximal phalanx of digit 5

133
Q

Flexor digiti minimi brevis

Action

A

Flexes digit 5

134
Q

Flexor digiti minimi brevis

Innervation

A

Ulnar nerve

135
Q

Flexor digiti minimi brevis

Blood supply

A

Deep palmar branch of the Ulnar artery

136
Q

Opponens digiti minimi

Origin

A

Pisiform, hamate, and transverse carpal ligament

  • part of hypOthenar eminence
137
Q

Opponens digiti minimi

Insertion

A

Medial border of the fifth metacarpal bone

138
Q

Opponens digiti minimi

Action

A

Rotates fifth metacarpal towards palm

139
Q

Opponens digiti minimi

Innervation

A

Ulnar nerve

140
Q

Opponens digiti minimi

Blood supply

A

Deep palmar branch of the Ulnar artery

141
Q

Lumbricals

Origin

A

Flexor digitorum profundus tendons

142
Q

Lumbricals

Insertion

A

Radial side of the extensor expansions of digits 2–5

143
Q

Lumbricals

Action

A
  • Flexes MCP

- Extends PIP and DIP of digits 2–5

144
Q

Lumbricals

Innervation

A

1 and 2—median n.

3 and 4—deep branch of ulnar n.

145
Q

Lumbricals

Blood supply

A

Superficial AND Deep palmar arterial arches

146
Q

Adductor pollicis

Origin

A
  • Transverse head—anterior surface of the shaft of third metacarpal
  • Oblique head—second and third metacarpals and adjacent carpal bones
147
Q

Adductor pollicis

Insertion

A

Medial side of base of proximal phalanx of thumb

148
Q

Adductor pollicis

Action

A

Draws the thumb toward the plane of the palm (adduction)

149
Q

Adductor pollicis

Innervation

A

Deep branch of ulnar n.

150
Q

Adductor pollicis

Blood supply

A

Deep palmar arterial arch

151
Q

Palmar interossei muscles

Origin

A

Palmar surface of metacarpals of digits 2, 4, and 5

152
Q

Palmar interossei muscles

Insertion

A

Base of the proximal phalanges and extensor expansion of digits 2, 4, and 5

153
Q

Palmar interossei muscles

Action

A
  • Adducts digits 2, 4, and 5

- Assists lumbricals in MCP flexion

154
Q

Palmar interossei muscles

Innervation

A

Deep branch of ulnar nerve

155
Q

Palmar interossei muscles

Blood supply

A

Deep palmar arterial arch

156
Q

Dorsal interossei muscles

Origin

A

Metacarpal bones 1–5

157
Q

Dorsal interossei muscles

Insertion

A

Base of the proximal phalanges and the extensor expansion of digits 2–4
-Lateral side of digits 2,3; Medial side of digits 3,4

158
Q

Dorsal interossei muscles

Action

A

Abducts digits 2–4 and assists lumbricals in MCP flexion

*D AB

159
Q

Dorsal interossei muscles

Innervation

A

Ulnar nerve (deep branch)

160
Q

Dorsal interossei muscles

Blood supply

A

Deep palmar arterial arch

161
Q

Anconeus

Origin

A

Lateral epicondyle of humerus

162
Q

Anconeus

Insertion

A

Lateral surface of olecranon and posterior surface of proximal ulna

163
Q

Anconeus

Action

A

Assists triceps in extension of the elbow

164
Q

Anconeus

Innervation

A

Radial nerve

165
Q

Anconeus

Blood supply

A

Deep brachial artery

166
Q

Extensor carpi radialis longus

Origin

A

Distal lateral supracondylar ridge

167
Q

Extensor carpi radialis longus

Insertion

A

Base of second metacarpal

168
Q

Extensor carpi radialis longus

Action

A

Extends and abducts the hand

169
Q

Extensor carpi radialis longus

Innervation

A

Radial nerve

170
Q

Extensor carpi radialis longus

Blood supply

A

Radial artery AND radial recurrent artery

171
Q

Extensor carpi radialis brevis

Origin

A

Lateral epicondyle of humerus

via common extensor tendon

172
Q

Extensor carpi radialis brevis

Insertion

A

Base of third metacarpal

173
Q

Extensor carpi radialis brevis

Action

A

Extends and abducts the hand

174
Q

Extensor carpi radialis brevis

Innervation

A

Deep branch of radial nerve

175
Q

Extensor carpi radialis brevis

Blood supply

A

Radial artery AND radial recurrent artery

176
Q

Extensor digitorum

Origin

A

Lateral epicondyle of humerus

via common extensor tendon

177
Q

Extensor digitorum

Insertion

A

Extensor expansions of digits 2–5

178
Q

Extensor digitorum

Action

A

Extends digits 2–5

179
Q

Extensor digitorum

Innervation

A

Posterior interosseous nerve

from radial nerve

180
Q

Extensor digitorum

Blood supply

A

Posterior interosseous artery (from ulnar artery)

181
Q

Extensor digiti minimi

Origin

A

Lateral epicondyle of humerus

via common extensor tendon

182
Q

Extensor digiti minimi

Insertion

A

Extensor expansion of digit 5

183
Q

Extensor digiti minimi

Action

A

Extends fifth digit

184
Q

Extensor digiti minimi

Innervation

A

Posterior interosseous nerve (from radial nerve)

185
Q

Extensor digiti minimi

Blood supply

A

Posterior interosseous artery (from ulnar artery)

186
Q

Extensor carpi ulnaris

Origin

A

Lateral epicondyle of humerus

via common extensor tendon

187
Q

Extensor carpi ulnaris

Insertion

A

Base of 5th metacarpal

188
Q

Extensor carpi ulnaris

Action

A

Extends and adducts hand

189
Q

Extensor carpi ulnaris

Innervation

A

Posterior interosseous nerve (from radial nerve)

190
Q

Extensor carpi ulnaris

Blood supply

A

Posterior interosseous artery (from ulnar artery)

191
Q

Supinator

Origin

A
  1. Lateral epicondyle of humerus
  2. Radial collateral and annular ligaments
  3. Crest of the ulna
192
Q

Supinator

Insertion

A

Lateral, posterior, and anterior surfaces of proximal 1/3 of the ulna

193
Q

Supinator

Action

A

Supinates the forearm

194
Q

Supinator

Innervation

A

Deep branch of the radial nerve

195
Q

Supinator

Blood supply

A

Radial recurrent artery AND posterior interosseous artery

196
Q

Abductor pollicis longus

Origin

A

Posterior surface of the:

  1. radius
  2. ulna
  3. interosseous membrane
197
Q

Abductor pollicis longus

Insertion

A

Base of first metacarpal

198
Q

Abductor pollicis longus

Action

A

Abducts and extends CMC of thumb

199
Q

Abductor pollicis longus

Innervation

A

Posterior interosseous nerve (from radial nerve)

200
Q

Abductor pollicis longus

Blood supply

A

Posterior interosseous artery

201
Q

Extensor pollicis brevis

Origin

A

Posterior surface of the:

  1. radius
  2. ulna
  3. interosseous membrane
202
Q

Extensor pollicis brevis

Insertion

A

Base of the proximal phalanx of digit 1

203
Q

Extensor pollicis brevis

Action

A

Extends MCP of thumb

204
Q

Extensor pollicis brevis

Innervation

A

Posterior interosseous nerve (from radial nerve)

205
Q

Extensor pollicis brevis

Blood supply

A

Posterior interosseous artery

206
Q

Extensor pollicis longus

Origin

A

Posterior surface of the:

  1. radius
  2. ulna
  3. interosseous membrane
207
Q

Extensor pollicis longus

Insertion

A

Base of the distal phalanx of digit 1

208
Q

Extensor pollicis longus

Action

A

Extends MCP and IP of thumb

209
Q

Extensor pollicis longus

Innervation

A

Posterior interosseous nerve (from radial nerve)

210
Q

Extensor pollicis longus

Blood supply

A

Posterior interosseous artery

211
Q

Extensor indicis

Origin

A

Posterior surface of radius, ulna, and interosseous membrane

212
Q

Extensor indicis

Insertion

A

Extensor expansion of digit 2

213
Q

Extensor indicis

Action

A

Extends digit 2

214
Q

Extensor indicis

Innervation

A

Posterior interosseous nerve

215
Q

Extensor indicis

Arterial supply

A

Posterior interosseous artery

216
Q

External intercostal muscles

Origin

A

Inferior border of the rib above

217
Q

External intercostal muscles

Insertion

A

Superior border of the rib below

218
Q

External intercostal muscles

Action

A

Elevates the rib below

219
Q

External intercostal muscles

Innervation

A

Intercostal nerves

220
Q

External intercostal muscles

Blood supply

A

Intercostal arteries

221
Q

Internal intercostal muscles

Origin

A

Inferior border of the rib above

222
Q

Internal intercostal muscles

Insertion

A

Superior border of the rib below

223
Q

Internal intercostal muscles

Action

A

Depresses the rib above

224
Q

Internal intercostal muscles

Innervation

A

Intercostal nn.

225
Q

Internal intercostal muscles

Blood supply

A

Intercostal arteries

226
Q

Innermost intercostal muscles

Origin

A

Inferior border of the rib above

227
Q

Innermost intercostal muscles

Insertion

A

Superior border of rib below

228
Q

Innermost intercostal muscles

Action

A

Depresses the rib above

229
Q

Innermost intercostal muscles

Innervation

A

Intercostal nn.

230
Q

Innermost intercostal muscles

Blood supply

A

Intercostal arteries

Foundations (9 decks)

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