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MSK: Gross Anatomy Exam 1 > (7) Upper Extremity Myology > Flashcards

(7) Upper Extremity Myology Flashcards

1
Q

Thoracoappendicular (Anterior Axioappendicular) Muscles

What are the (4)?

A
  1. Pectoralis Major M.
  2. Pectoralis Minor M.
  3. Subclavius M.
  4. Serratus Anterior M.
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2
Q

What muscle is this?

A

Pectoralis Major M.

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3
Q

Thoracoappendicular Muscles

Pectoralis Major M.

Origin?

A

Clavicular Head, Medial 1/2 of clavicle

Sternum

Costal Cartilages 1-6

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4
Q

Thoracoappendicular Muscles

Pectoralis Major M.

Insertion?

A

Lateral edge intertubercular groove of

HUMERUS

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5
Q

Thoracoappendicular Muscles

Pectoralis Major M.

Action?

A

ADduct and Medially rotate the HUMERUS

Protracts/retracts the SCAPULA

Clavicular head flexes the HUMERUS

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6
Q

Thoracoappendicular Muscles

Pectoralis Major M.

Innervation?

A

Lateral and Medial Pectoral N.

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7
Q

What is this?

A

Pectoralis Minor M.

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8
Q

Thoracoappendicular Muscles

Pectoralis Minor M.

Origin?

A

Medial aspects of ribs 3-5

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9
Q

Thoracoappendicular Muscles

Pectoralis Minor M.

Insertion?

A

Coracoid process of Scapula

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10
Q

Thoracoappendicular Muscles

Pectoralis Minor M.

Action?

A

STABILIZES the Scapula

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11
Q

Thoracoappendicular Muscles

Pectoralis Minor M.

Innervation?

A

Medial Pectoral N.

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12
Q

What is this?

A

Subclavius M.

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13
Q

Thoracoappendicular Muscles

Subclavius M.

Origin?

A

Upper border 1st rib and 1st costal cartilage

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14
Q

Thoracoappendicular Muscles

Subclavius M.

Insertion?

A

Inferior aspect of clavicle

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15
Q

Thoracoappendicular Muscles

Subclavius M.

Action?

A

Stabilize the CLAVICLE

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16
Q

Thoracoappendicular Muscles

Subclavius M.

Innervation?

A

Nerve to the Subclavius M. (C5-6)

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17
Q

What is this?

A

Serratus Anterior M.

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18
Q

Thoracoappendicular Muscles

Serratus Anterior M.

Origin?

A

Lateral external surface of ribs 1-8

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19
Q

Thoracoappendicular Muscles

Serratus Anterior M.

Insertion?

A

Anterior surface of Medial border of SCAPULA

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20
Q

Thoracoappendicular Muscles

Serratus Anterior M.

Action?

A

Protracts Scapula

Rotates glenoid cavity superiorly

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21
Q

Thoracoappendicular Muscles

Serratus Anterior M.

Innervation?

A

Long Thoracic N.

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22
Q

CN:

What usually results in “winging of the scapula”?

A

Injury of Serratus Anterior M.

OR

Injury of Long thoracic N.

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23
Q

CN:

What does an injury to the serratus anterior m. or the long thoracic n. usually cause?

A

Winging of the scapula

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24
Q

What are the Posterior Axioappendicular Muscles?

A
  1. Trapezius M.
  2. Latissimus Dorsi M.
  3. Rhomboid Major M.
  4. Rhomboid Minor M.
  5. Levator Scapulae M.
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25
Q

What are the Scapulohumeral Muscles?

A
  1. Deltoid M.
  2. Supraspinatus M.
  3. Infraspinatus M.
  4. Teres minor M.
  5. Teres Major M.
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26
Q

Label the diagram for the Scapulohumeral Muscles

A
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27
Q

What is this?

A

Deltoid M.

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28
Q

Scapulohumeral Muscles

Deltoid M.

Origin?

A

Lateral 1/3 of clavicle

Scapular Spine

Acromion

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29
Q

Scapulohumeral Muscles

Deltoid M.

Insertion?

A

Deltoid Tuberosity of Humerus

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30
Q

Scapulohumeral Muscles

Deltoid M.

Action?

A

Anterior part= Flex and medially rotate the humerus

Middle part= ABduct the humerus

Posterior part= Extend and laterally rotate the humerus

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31
Q

Scapulohumeral Muscles

Deltoid M.

Innveration?

A

Axillary N.

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32
Q

What is this?

A

Subscapularis M.

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33
Q

Deltoid M.

What’s special about it?

A

Think about the action, two opposing actions

CAN HAPPEN BECAUSE…

Deltoid M. is multipennate

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34
Q

What are the Rotator Cuff Muscles?

A

SITS

Subscapularis M.

Infraspinatus M.

Teres Minor M.

Supraspinatus M.

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35
Q

Scapulohumeral Muscles

Subscapularis M.

Origin?

A

Medial aspect of the Subscapular Fossa

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36
Q

Scapulohumeral Muscles

Subscapularis M.

Insertion?

A

Lesser tubercle of the HUMERUS

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37
Q

Scapulohumeral Muscles

Subscapularis M.

Action?

A

Medially rotate and ADduct the Humerus

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38
Q

Scapulohumeral Muscles

Subscapularis M.

Innervation?

A

Upper and Lower Subscapular N.

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39
Q

What is this?

A

Supraspinatus M.

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40
Q

Scapulohumeral Muscles

Supraspinatus M.

Origin?

A

Supraspinous Fossa of SCAPULA

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41
Q

Scapulohumeral Muscles

Supraspinatus M.

Insertion?

A

Greater tubercle of the HUMERUS

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42
Q

Scapulohumeral Muscles

Supraspinatus M.

Action?

A

W/ deltoid m. …

ABduct the humerus

Holds the Humeral head in the glenoid cavity

43
Q

Scapulohumeral Muscles

Supraspinatus M.

Innervation?

A

Suprascapular N.

44
Q

What is this?

A

Supraspinatus M.

45
Q

What is this?

A

Infraspinatus M.

46
Q

Scapulohumeral Muscles

Infraspinatus M.

Origin?

A

Infraspinous fossa of Scapula

47
Q

Scapulohumeral Muscles

Infraspinatus M.

Insertion?

A

Greater tubercle of Humerus

48
Q

Scapulohumeral Muscles

Infraspinatus M.

Action?

A

LATERALLY rotates the HUMERUS

Holds humeral head in glenoid cavity

49
Q

Scapulohumeral Muscles

Infraspinatus M.

Innervation?

A

Suprascapular N.

50
Q

What is this?

A

Teres Minor M.

51
Q

Scapulohumeral Muscles

Teres Minor M.

Origin?

A

Middle part of the lateral border of the SCAPULA

52
Q

Scapulohumeral Muscles

Teres Minor M.

Insertion?

A

Greater tubercle of the HUMERUS

53
Q

Scapulohumeral Muscles

Teres Minor M.

Action?

A

Laterally rotates the HUMERUS

Holds the humeral head in the glenoid cavity

54
Q

Scapulohumeral Muscles

Teres Minor M.

Innervation?

A

Axillary N.

55
Q

CN:

What is the most commonly injured rotator cuff muscle?

A

Supraspinatous M.

56
Q

What is this?

A

Teres Major M.

57
Q

Scapulohumeral Muscles

Teres Major M.

Origin?

A

Posterior aspect of the INFERIOR angle of the SCAPULA

58
Q

Scapulohumeral Muscles

Teres Major M.

Insertion?

A

Medial edge of the Intertubercular Groove Humerus

59
Q

Scapulohumeral Muscles

Teres Major M.

Action?

A

ADduct and Medially rotate the humerus

60
Q

Scapulohumeral Muscles

Teres Major M.

Innervation?

A

Lower Subscapular N.

61
Q

What are the ROTATOR CUFF MUSCLES?

A

SITS

Supraspinatous M., Infraspinatus M., Subscapularis M., Teres Minor M.

62
Q

What is this MRI showing?

A

(Left): Normal MRI

(Right): Rotator Cuff Tear

63
Q

Spaces of the Posterior Shoulder

Label the following:

A
64
Q

What is the point of learning the spaces of the posterior shoulder?

A

There are several important structures that are in the contents of THREE spaces

65
Q

Spaces of the Posterior Shoulder

Triangular Space

What are the borders?

A

Teres Minor M.

Teres Major M.

Long Head of the Triceps Brachii M.

66
Q

Spaces of the Posterior Shoulder

Triangular Space

Contents?

A

Circumflex Scapular A. and V.

67
Q

Spaces of the Posterior Shoulder

Quadrangular Space

Borders?

A

Teres Minor M.

Teres Major M.

Long and Lateral Heads of the Triceps Brachii M.

68
Q

Spaces of the Posterior Shoulder

Quadrangular Space

Contents?

A

Posterior Humeral Circumflex A. and V.

Axillary N.

69
Q

Spaces of the Posterior Shoulder

Triangular Interval

Borders?

A

Teres Major M.

Long and Lateral Heads of the Triceps Brachii M.

70
Q

Spaces of the Posterior Shoulder

Triangular Interval

Contents

A

Deep Brachial A. and V.

Radial N.

71
Q

What are these?

A

Brachial Muscles in the Anterior Compartment

72
Q

What are the muscles that make up the Brachial Muscles in the Anterior Compartment?

A

Coracobrachialis M.

Biceps Brachii M.

Brachialis M.

73
Q

Brachial (Arm) Muscles | Anterior Compartment

Biceps Brachii M.

Origin?

A
  • Long head* : Supraglenoid tubercle of the scapula
  • Short head* : Coracoid process of the scapula
74
Q

Brachial (Arm) Muscles | Anterior Compartment

Biceps Brachii M.

Insertion?

A

Radial Tuberosity and Antebrachial Fascia as the

BICIPITAL APONEUROSIS

75
Q

Brachial (Arm) Muscles | Anterior Compartment

Biceps Brachii M.

Action?

A

Flex the humerus

Flex the supine forearm

Supinate forearm

76
Q

Brachial (Arm) Muscles | Anterior Compartment

Biceps Brachii M.

Innervation?

A

Musculocutaneous N.

77
Q

CN:

Striking the thumb placed over the Bicipital Tendon with a reflex hammer should produce…

A

Bicipital Myotactic Reflex

78
Q

CN:

What is the Bicipital Myotactic Reflex?

A

Failure of this tendon to tighten up when striken with thumb placed over Bicipital Tendon should produce the Bicipital Myotactic Reflex

FAILURE = Injury to Musculocutaneous N or C5/C6 Anterior Rami

79
Q

CN:

What is Biceps Tendinitis?

A

Caused by: repetitive movement of the Long head of the Biceps T. through the Intertubercular Groove makes that tendon susceptible to inflammation and even CREPITUS

80
Q

CN:

What is Popeye Deformity?

A

When Biceps T. dislocates out of Intertubercular Groove or separates from Supraglenoid Tubercle

Creates balling up of muscle in arm

81
Q

Brachial (Arm) Muscles | Anterior Compartment

Coracobrachialis M.

Origin?

A

Coracoid process of Scapula

82
Q

Brachial (Arm) Muscles | Anterior Compartment

Coracobrachialis M.

Insertion?

A

Medial aspect of the Humeral Body

83
Q

Brachial (Arm) Muscles | Anterior Compartment

Coracobrachialis M.

Action?

A

Flex and ADduct the humerus

84
Q

Brachial (Arm) Muscles | Anterior Compartment

Coracobrachialis M.

Innervation?

A

Musculocutaneous N.

85
Q

Brachial (Arm) Muscles | Anterior Compartment

Brachialis M.

Origin?

A

Distal half of the anterior aspect of the HUMERAL BODY

86
Q

Brachial (Arm) Muscles | Anterior Compartment

Brachialis M.

Insertion?

A

Ulnar tuberosity and Coronoid Process

87
Q

Brachial (Arm) Muscles | Anterior Compartment

Brachialis M.

Action?

A

Flex the forearm

88
Q

Brachial (Arm) Muscles | Anterior Compartment

Brachialis M.

Innervation?

A

Musculocutaneous N.

89
Q

Label the diagram

A

Brachialis M.

90
Q

Label the diagram

A

Coracobrachialis M.

91
Q

What are the brachial muscles of the posterior compartment?

A
  • Triceps Brachii M.
  • Anconeus M.
92
Q

Label the diagram of the Posterior Compartment of Brachial Muscles

A
93
Q

Label the diagram of the Posterior Compartment of Brachial Muscles

A
94
Q

What are the two muscles of the Biceps Muscles Posterior Compartment?

A
  • Triceps Brachii M.
  • Anconeus M.
95
Q

Brachial Muscles | Posterior Compartment

Triceps Brachii M.

Origin?

A

Long head: Infraglenoid tubercle of scapula

Medial Head: Posterior aspect of the Humeral Body; inferior to radial groove

Lateral head: Posterior aspect of the Humeral Body

96
Q

Brachial Muscles | Posterior Compartment

Triceps Brachii M.

Insertion?

A

Olecranon of Ulna

and

Antebrachial Fascia

97
Q

Brachial Muscles | Posterior Compartment

Triceps Brachii M.

Action?

A

Extend the forearm

98
Q

Brachial Muscles | Posterior Compartment

Triceps Brachii M.

Innervation?

A

Radial N.

99
Q

Brachial Muscles | Posterior Compartment

Anconeus M.

Origin?

A

Lateral Humeral Epicondyle

100
Q

Brachial Muscles | Posterior Compartment

Anconeus M.

Insertion?

A

Lateral aspect of Olecranon

101
Q

Brachial Muscles | Posterior Compartment

Anconeus M.

Action?

A

With the Triceps Brachii M.

EXTENDS the forearm

102
Q

Brachial Muscles | Posterior Compartment

Anconeus M.

Innervation?

A

Radial N.

103
Q

What is this?

A

Anconeus M.

104
Q
A

MSK: Gross Anatomy Exam 1 (12 decks)

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