Posterior Axioapendicular Muscles

Question 0

What are the two deep posterior axioapendicular muscles?

Answer 0

Levator scapulae and rhomboid major and minor

Question 1

What are the two superficial axioapendicular muscles?

Answer 1

Trapezius and latissimus dorsi

Question 2

What are the six scapulohumeral muscles?

Answer 2

Deltoid, supraspinatous, infraspinatous, teres minor, teres major, and subscapularis

Question 3

What are the four muscles of the rotator cuff?

Answer 3

SITS - supraspinatous, infraspinatous, teres minor, and subscapularis

Question 4

What muscles assist in abduction of the arm and what degrees?

Answer 4

Supraspinatous (first 15 degrees) and deltoid

Question 5

Deltoid

Answer 5

Origin: lateral third of the clavicle, acromion, and spine of the scapula

Insertion: deltoid tuberosity of the humerus

Innervation: axillary nerve (C5,C6)

Action: clavicular part - flexion and medial rotation of the arm; acromial part - ABD of arm; spinal part - extends and laterally rotates arm

Question 6

Supraspinatous

Answer 6

Origin: supraspinous fossa of scapula

Insertion: superior facet of greater tubercle of humerus

Innervation: suprascapular nerve (C4,C5,C6)

Action: initiates and assists deltoid in ADD and acts with other rotator cuff muscles

Question 7

Infraspinatous

Answer 7

Origin: infraspinous fossa of the scapula

Insertion: middle facet of greater tubercle of humerus

Innervation: suprascapular nerve (C5,C6)

Action: laterally rotates arm and helps hold humeral head in glenoid cavity

Question 8

Teres minor

Answer 8

Origin: middle part of the lateral border of the scapula

Insertion: inferior facet of greater tubercle of humerus

Innervation: axillary nerve (C5,C6)

Action: laterally rotates arm and helps hold humeral head in glenoid cavity of scapula

Question 9

Teres major

Answer 9

Origin: posterior surface of inferior angle of scapula

Insertion: medial lip of intertubercular sulcus of humerus

Innervation: lower subscapular nerve (C5,C6)

Action: ADD and medial rotation of the arm

Question 10

Subscapularis

Answer 10

Origin: subscapular fossa

Insertion: lesser tubercle of humerus

Innervation: upper and lower subscapular nerves (C5,C6,C7)

Action: medial rotation and ADD of the arm and helps hold humeral head in the glenoid cavity