Scapulohumeral Muscles

Question 0

Insertion of Deltoid?

Answer 0

Deltoid tuberosity of humerus

Question 1

Origin of Deltoid?

Answer 1

Lateral third of clavicle, acromion and spine of scapula

Question 2

Innervation of Deltoid?

Answer 2

Axillary Nerve (C5, C6)

Question 3

Actions of Deltoid?

Answer 3

Clavicular (anterior) part flexes and medially rotates shoulder joint, acromial (middle) part abducts shoulder joint; spinal (posterior) part extends and laterally rotates the shoulder

Question 4

Origin of Supraspinatus?

Answer 4

Supraspinous fossa of scapula

Question 5

Insertion of Supraspinatus?

Answer 5

Superior facet of greater tubercle of humerus

Question 6

Innervation of Supraspinatus?

Answer 6

Suprascapular nerve (C4, C5, C6)

Question 7

Action of Supraspinatus?

Answer 7

Initiates and assists deltoid in abduction of shoulder joint and acts with other rotator cuff muscles

Question 8

Infraspinatus Origin?

Answer 8

Infraspinous fossa of scapula

Question 9

Infraspinatus Insertion?

Answer 9

Middle facet of greater tubercle of humerus

Question 10

Innervation of Infraspinatus?

Answer 10

Suprascapular nerve (C5, C6)

Question 11

Infraspinatus action?

Answer 11

Laterally rotate the shoulder joint; help hold humeral head in glenoid cavity of scapula

Question 12

Teres Minor Origin?

Answer 12

Middle part of lateral border of scapula

Question 13

Teres minor insertion?

Answer 13

Inferior facet of greater tubercle of humerus

Question 14

Innervation of Teres minor?

Answer 14

Axillary nerve (C5, C6)

Question 15

Action of Teres Minor?

Answer 15

Laterally rotate the shoulder joint; help hold humeral head in glenoid cavity of scapula

Question 16

Teres Major origin?

Answer 16

Inferior part of lateral border of scapula and posterior surface of inferior angle of scapula

Question 17

Teres major insertion?

Answer 17

Medial lip of intertubercular sulcus of humerus

Question 18

Innervation of Teres Major?

Answer 18

Lower subscapular nerve (C5, C6)

Question 19

Actions of Teres major?

Answer 19

Adducts and medially rotates the shoulder joint

Question 20

Subscapularis Origin?

Answer 20

Subscapular fossa (most of anterior surface of scapula)

Question 21

Insertion of subscapularis?

Answer 21

Lesser tubercle of humerus

Question 22

Innervation of Subscapularis?

Answer 22

Upper and lower sub-scapular nerves (C5, C6, C7)

Question 23

Subscapularis Actions?

Answer 23

Medially rotates and adducts shoulder joint; helps hold humeral head in glenoid cavity.