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Upper Limb 1 > Muscles Of Shoulder And Pectoral Region > Flashcards

Muscles Of Shoulder And Pectoral Region Flashcards

1
Q

Insertion of Superior fibres of Trapezius

A

Lateral 1/3rd of clavicle and acromion

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2
Q

Innervation of Superior fibres of Trapezius

A

Accessory Nerve (CN11)

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3
Q

Function of Superior fibres of Trapezius

A

Elevate Scapula

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4
Q

Origin of Middle fibres of Trapezius

A

Spinous processes of T1-T5

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5
Q

Insertion of Middle fibres of Trapezius

A

Superior border of spine of scapula (lateral 2/3rds)

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6
Q

Innervation of Middle fibres of Trapezius

A

Accessory Nerve (CN11)

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7
Q

Function of Middle fibres of Trapezius

A

Retract Scapula

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8
Q

Origin of lower fibres of Trapezius

A

Spinous processes of T6-T12

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9
Q

Insertion of lower fibres of Trapezius

A

Medial 1/3rds of spine of scapula

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10
Q

Innervation of lower fibres of Trapezius

A

Accessory Nerve (CN11)

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11
Q

Function of lower fibres of Trapezius

A

Depresses scapula

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12
Q

Origin of levator scapulae

A

Transverse processes of C1-C4

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13
Q

Insertion of levator scapulae

A

Medial border of scapula superior to root of spine

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14
Q

Innervation to levator scapulae

A

Dorsal scapula nerve (C5)

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15
Q

Function of levator scapulae

A 
Elevate scapula
Rotate medially (downwards)
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16
Q

Origin of Superior fibres of Trapezius

A

Superior Nuchal Line
External Occipital Protuberance
Ligamentum Nuchae
Spinous Process of C7

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17
Q

Origin of Rhomboid major

A

Spinous processes of T2-T5

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18
Q

Insertion of Rhomboid major

A

Medial border of scapula Inferior to level of spine

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19
Q

Innervation of Rhomboid major

A

Dorsal Scapular Nerve (C5)

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20
Q

Function of Rhomboid major

A

Retract scapula medially

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21
Q

Origin of Rhomboid minor

A

Spinous processes of C7-T1

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22
Q

Insertion of Rhomboid minor

A

Medial border of spine at level of scapula

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23
Q

Innervation of Rhomboid minor

A

Dorsal Scapular Nerve (C5)

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24
Q

Function of Rhomboid minor

A

Retract the scapula medially and superior

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25
Q

Origin of serratus anterior

A

Ribs 1-8

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26
Q

Insertion of serratus anterior

A

Medial border of scapula

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27
Q

Innervation of serratus anterior

A

Long Thoracic Nerve (C5-C7)

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28
Q

Function of serratus anterior

A

Protracts scapula

Rotates scapula inferiorly

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29
Q

What is winged scapula?

A

Damage to long thoracic nerve
Lies superior to serratus anterior
Medial and inferior border of scapula pull away

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30
Q

Origin of Pectoralis major

A

Sternal Head - anterior surface of sternum

                  - costal cartilages 1-7
                  - sternal end of 6th rib
                  - aponeurosis of external oblique

Clavicular Head - anterior surface of medial half of clavicle

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31
Q

Insertion of Pectoralis major

A

Lateral lip of intertubecular groove of humerus

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32
Q

Innervation of Pectoralis major

A

Sternal Head - medial pectoral nerve (C8-T1)

Clavicular Head - lateral pectoral nerve (C5-C7)

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33
Q

Function of Pectoralis major

A 
Flexion
Adduction 
Medial rotation of arm
Flexion of extended arm ( clavicular head)
Extension of flexed arm ( sternal head )
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34
Q

Origin of Pectoralis minor

A

Anterior surfaces of sternal ends of ribs 3-5

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35
Q

Insertion of Pectoralis minor

A

Coracoid process of scapula

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36
Q

Innervation of Pectoralis minor

A

Medial pectoral nerve (C8-T1)

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37
Q

Function of Pectoralis minor

A

Draws scapula forward and downwards

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38
Q

Origin of subclavius

A

First rib at junction between rib and costal cartilage

39
Q

Insertion of subclavius

A

Subclavian groove on inferior surface of clavicle

40
Q

Innervation of subclavius

A

Subclavian nerve (C5-C6)

41
Q

Function of subclavius

A

Pulls tip of shoulder down

Stabilises sternoclavicular joint

42
Q

Origin of latissimus dorsi

A 
Spinous processes of T7-L5
Iliac crest of sacrum
Thoracolumbar fascia
Inferior angle of scapula
Lower 3-4 ribs
43
Q

Insertion of latissimus dorsi

A

Floor of intertubecular groove of humerus

44
Q

Innervation of latissimus dorsi

A

Thoracodorsal nerve (C6-C8)

45
Q

Functions of latissimus dorsi

A

Adducts the arm
Medially rotates the arm
Extends the arm

46
Q

Painful arc syndrome

A

Calcified bursitis

  • typically develops in males >50
  • pain during 50-130 degrees of abduction
  • subacromial bursa in contact with acromion
47
Q

Name the rotator cuff muscles

A

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

48
Q

Origin of supraspinatus

A

Supraspinous fossa of scapula

49
Q

Insertion of supraspinatus

A

Superior facet of greater tubercle of humerus

50
Q

Innervation of supraspinatus

A

Suprascapular nerve (C5-C6)

51
Q

Function of supraspinatus

A

Initiates abduction of arm (first 15 degrees)

Stabilises glenohumeral joint

52
Q

Origin of Infraspinatus

A

Infraspinous fossa of scapula

53
Q

Insertion of Infraspinatus

A

Middle facet of greater tubercle of humerus

54
Q

Innervation of infraspinatus

A

Suprascapular Nerve (C5-C6)

55
Q

Function of infraspinatus

A

Lateral Rotator of humerus

Stabilises glenohumeral joint

56
Q

Origin of Teres Minor

A

Middle part of lateral border of scapula

57
Q

Insertion of Teres Minor

A

Inferior facet of greater tubercle of humerus

58
Q

Innervation of Teres Minor

A

Axillary Nerve

59
Q

Function of Teres Minor

A

Laterally rotates and adducts humerus

Stabilises glenohumeral joint

60
Q

Origin of subscapularis

A

Subscapular Fossa

61
Q

Insertion of subscapularis

A

Lesser tubercle of humerus

62
Q

Innervation of subscapularis

A

Upper and lower subscapular nerves (C5-C6)

63
Q

Function of subscapularis

A

Medial rotator and adductor of humerus

64
Q

Origin of Teres Major

A

Inferior angle of scapula

65
Q

Insertion of Teres Major

A

Medial Lip of intertubecular groove

66
Q

Innervation of Teres Major

A

Lower subscapular nerve (C5-C6)

67
Q

Function of Teres Major

A

Adducts and medially rotates humerus

68
Q

What vessels wrap around the surgical neck of the humerus?

A

Axillary nerve

Posterior Circumflex humeral artery

69
Q

Origin of Anterior fibres of Deltoid

A

Anterior surface of lateral clavicle

70
Q

Insertion of Anterior fiberes of Deltoid

A

Deltoid Tuberosity

71
Q

Innervation of Anterior fibres of Deltoid

A

Axillary Nerve (C5-C6)

72
Q

Function of Anterior fibres of Deltoid

A

Flexes arm at shoulder

Medially rotates arm

73
Q

Origin of Middle Fibres of Deltoid

A

Acromion process

Spine of scapula

74
Q

Insertion of Middle fibres of Deltoid

A

Deltoid Tuberosity

75
Q

Innervation of Middle fibres of Deltoid

A

Axillary Nerve (C5-C6)

76
Q

Function of Middle fibres of Deltoid

A

Abducts the arm at the shoulder joint

77
Q

Origin of Posterior fibres of Deltoid

A

Spine of scapula (medial to middle fibres)

78
Q

Insertion of Posterior fibres of Deltoid

A

Deltoid Tuberosity of humerus

79
Q

Innervation of Posterior fibres of Deltoid

A

Axillary Nerve (C5-C6)

80
Q

Function of Posterior fibres of Deltoid

A

Laterally Rotates arm

Extends Arm

81
Q

Describe abduction at shoulder joint..

A

Supraspinatus initiates abduction (first 10-15 degrees)

Deltoids then take over

82
Q

Boundaries of Quadrangular Space

A

Lateral - Surgical Neck of Humerus
Medial - Triceps Brachii
Inferior - Teres Major
Superior - Teres Minor

83
Q

Contents of Quadrangular Space

A

Axillary Nerve

Posterior Circumflex Humeral Artery and Vein

84
Q

Muscles responsible for Elevation of Pectoral Girdle

A

Trapezius (superior fibres)
Levator Scapulae
Rhomboid (major and minor)

85
Q

Muscles responsible for Depression of Pectoral Girdle

A 
Gravity
Pectoralis Minor
Trapezius (inferior)
Latissimus Dorsi
Pectoralis Major
Serratus Anterior
86
Q

Muscles responsible for Protraction of Pectoral Girdle

A

Pectoralis minor
Serratus Anterior
Pectoralis Major

87
Q

Muscles responsible for Retraction of Pectoral Girdle

A

Rhomboid (major and minor)
Latissimus Dorsi
Trapezius (middle)

88
Q

Muscles responsible for Upward (lateral) Rotation of Pectoral Girdle

A

Trapezius (superior)
Trapezius (inferior)
Serratus Anterior

89
Q

Muscles responsible for Downward (medial) Rotation of Pectoral Girdle

A 
Levator Scapulae
Rhomboid (major and minor)
Pectoralis major
Latissimus Dorsi
Pectoralis Minor
90
Q

Origin of Coracobrachialis

A

Coracoid Process of scapula

91
Q

Insertion of Coracobrachialis

A

Mid-medial surface of humerus

92
Q

Innervation of Coracobrachialis

A

Musculocutaneous nerve (C5-7)

93
Q

Action of Coracobrachialis

A

Flexes at shoulder joint

Adducts the arm at shoulder joint

Upper Limb 1 (2 decks)

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