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Anatomy > Dorsal Scapular Muscles > Flashcards

Dorsal Scapular Muscles Flashcards

1
Q

What is the MA of the Deltoid?

A

Clavicular (Anterior): flexion and medial (internal) rotation of the arm

Acromial (Middle): abduction of the arm

Spinal (Posterior): extension and lateral (external) rotation of the arm

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2
Q

What is the PA of the Deltoid?

A

Clavicle, acromion, and spine of scapula (where trap ends)

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3
Q

What is the DA of the Deltoid?

A

Deltoid tuberosity of humerus

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4
Q

What is the N for the Deltoid?

A

Axillary nerve (C5 and C6)

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5
Q

What is the MA of the Pectoralis Major?

A

Adduction and medial (internal) rotation of the humerus

Protraction (abduction) of the scapula (draws scapula anteriorly and inferiorly)

Horizontal adduction of the arm

Clavicular Head: flexion of the humerus

Sternocostal Head: extension of the humerus from the flexed position

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6
Q

What is the PA of the Pectoralis Major?

A

Clavicular Head: clavicle

Sternocostal Head: sternum, superior 6 costal cartilages, and external oblique muscle

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7
Q

What is the DA of the Pectoralis Major?

A

Lateral lip of intertubercular sulcus of humerus

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8
Q

What is the N for the Pectoralis Major?

A

Lateral and medial pectoral nerves: Clavicular Head (C5 and C6) and Sternocostal Head (C7, C8, T1)

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9
Q

What is the MA of the Pectoralis Minor?

A

Stabilization of scapula by drawing it inferiorly and anteriorly against thoracic wall

With the scapula fixed, assists to elevate the thorax during forced inhalation

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10
Q

What is the PA of the Pectoralis Minor?

A

Ribs 3-5

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11
Q

What is the DA of the Pectoralis Minor?

A

Coracoid process

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12
Q

What is the N for the Pectoralis Minor?

A

Medial pectoral nerve (C8 and T1) and lateral pectoral nerve (variable)

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13
Q

What is the MA of the Infraspinatus?

A

External rotation of the shoulder (glenohumeral joint)

MAIN EXTERNAL ROTATOR

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14
Q

What is the PA of the Infraspinatus?

A

Infraspinous fossa

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15
Q

What is the DA of the Infraspinatus?

A

Greater tubercle of humerus

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16
Q

What is the N for the Infraspinatus?

A

Suprascapular nerve (C5 and C6)

17
Q

What is the MA of the Teres Major?

A

Adduction and internal (medial) rotation of the shoulder (glenohumeral joint)

18
Q

What is the PA of the Teres Major?

A

Posterior scapula

19
Q

What is the DA of the Teres Major?

A

Medial lip of intertubercular sulcus of the humerus

20
Q

What is the N for the Teres Major?

A

Lower subscapular nerve (C5 and C6)

21
Q

What is the MA of the Supraspinatus?

A

Initiates and assists deltoid in abduction of the arm

Stabilize the head of humerus in glenoid cavity, along with the other SITS muscles

22
Q

What is the PA of the Supraspinatus?

A

Supraspinous fossa of the scapula

23
Q

What is the DA of the Supraspinatus?

A

Greater tubercle of humerus

24
Q

What is the N for the Supraspinatus?

A

Suprascapular nerve (C4, C5, and C6)

25
Q

What is the MA of the Teres Minor?

A

External rotation of the shoulder (glenohumeral joint) and stabilization of the head of humerus in glenoid cavity

26
Q

What is the PA of the Teres Minor?

A

Lateral border of the scapula

27
Q

What is the DA of the Teres Minor?

A

Greater tubercle of the humerus

28
Q

What is the N for the Teres Minor?

A

Axillary nerve (C5 and C6)

29
Q

What is the MA of the Subscapularis?

A

Internal rotation of the shoulder and stabilization of the head of humerus in glenoid cavity

30
Q

What is the PA of the Subscapularis?

A

Subscapular fossa

31
Q

What is the DA of the Subscapularis?

A

Lesser tubercle of humerus

32
Q

What is the N for the Subscapularis?

A

Upper and lower subscapular nerve (C5, C6, and C7)

33
Q

What is the MA of the Serratus Anterior?

A

Protraction of the scapula (scapulothoracic joint), upward rotation of the scapula (scapulothoracic joint), and holds the scapula against the thoracic wall

34
Q

What is the PA of the Serratus Anterior?

A

Lateral parts of ribs 1-8 or 1-9

35
Q

What is the DA of the Serratus Anterior?

A

Medial border of scapula

36
Q

What is the N for the Serratus Anterior?

A

Long thoracic nerve (C5, C6, and C7)

SALT- Serratus Anterior Long Thoracic

Anatomy (34 decks)

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