Scapulohumeral Muscles

Question 0

Distal attachment of deltoid

Answer 0

Deltoid tuberosity of humerus

Question 1

Proximal attachment of deltoid

Answer 1

Lateral third of clavicle, acromion and spine of scapula

Question 2

Innervation of deltoid

Answer 2

Axillary nerve (c5 and c6)

Question 3

Actions of deltoid

Answer 3

Clavicular (anterior) part flexes and medially rotates shoulder joint
Acromial (medial) part abducts shoulder joint
Spinal (posterior) part extends and laterally rotates shoulder joint

Question 4

Proximal attachment of supraspinatus

Answer 4

Supraspinous fossa of scapula

Question 5

Distal attachment of supraspinatus

Answer 5

Superior facet of the greater tubercle of humerus

Question 6

Innervation of supraspinatus

Answer 6

Suprascapular nerve (c4, c5, c6)

Question 7

Actions of supraspinatus

Answer 7

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

Question 8

Proximal attachment of infraspinatus

Answer 8

Infraspinous fossa of scapula

Question 9

Distal attachment of infraspinatus

Answer 9

Middle facet of greater tubercle of humerus

Question 10

Innervation of infraspinatus

Answer 10

Suprascapular nerve (c5 and c6)

Question 11

Actions of infraspinatus

Answer 11

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

Question 12

Proximal attachment of teres minor

Answer 12

Middle part of lateral border of scapula

Question 13

Distal attachment of teres minor

Answer 13

Inferior facet of greater tubercle of humerus

Question 14

Innervation of teres minor

Answer 14

Axillary nerve (c5 and c6)

Question 15

Actions of teres minor

Answer 15

Laterally rotate shoulder joint, helps hold humeral head in glenoid cavity of scapula

Question 16

Proximal attachment of teres major

Answer 16

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

Question 17

Distal attachment of teres major

Answer 17

Medial lip of intertubercular sulcus of humerus

Question 18

Innervation of teres major

Answer 18

Lower subscapular nerve (c5 and c6)

Question 19

Actions of teres major

Answer 19

Adducts and medially rotates shoulder joint

Question 20

Proximal attachment of subscapularis

Answer 20

Subscapular fossa = most of the anterior surface of scapula

Question 21

Distal attachment of subscapularis

Answer 21

Lesser tubercle of humerus

Question 22

Innervation of subscapularis

Answer 22

Upper and lower subscapular nerves (c5, c6, c7)

Question 23

Actions of subscapularis

Answer 23

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

Question 24

Rotator cuff muscles

Answer 24

Supraspinatus, infraspinatus, teres minor, subscapularis