Grant's Ch. 2 - Scapulohumeral Muscles (P1)

Question 1

List the 6 scapulohumeral muscles.

Answer 1

1) Deltoid
2) Supraspinatus
3) Infraspinatus
4) Teres major
5) Teres minor
6) Subscapularis

Question 2

Which 4 scapulohumeral muscles comprise the rotator cuff (HINT: SITS)?

Answer 2

1) Supraspinatus
2) Infraspinatus
3) Teres minor
4) Subscapularis

Question 3

List the 3 proximal attachments of the deltoid.

Answer 3

1) Spine of scapula
2) Acromion of scapula
3) Lateral 1/3 of the clavicle

Question 4

What is the distal attachment of the deltoid?

Answer 4

Deltoid tuberosity of humerus

Question 5

List the 4 actions of the deltoid.

NOTE: All Humerus Actions

Answer 5

1) Abduct humerus
2) Flex humerus
3) Extend humerus
4) Medially+laterally rotate humerus

Question 6

What innervates the deltoid?

Answer 6

Axillary n.

Question 7

What is the proximal attachment of the supraspinatus?

Answer 7

Supraspinous fossa of the scapula

Question 8

What is the distal attachment of the supraspinatus?

Answer 8

Superior facet of the greater tubercle of the humerus

Question 9

What is the only action of the supraspinatus (HINT: humerus)?

Answer 9

Abduct humerus

Question 10

What innervates the supraspinatus?

Answer 10

Suprascapular n.

Question 11

What is the proximal attachment of the infraspinatus?

Answer 11

Infraspinous fossa of the scapula

Question 12

What is the distal attachment of the infraspinatus?

Answer 12

Middle facet of the greater tubercle of the humerus

Question 13

What is the only action of the infraspinatus?

Answer 13

Laterally rotate the humerus

Question 14

What innervates the infraspinatus (HINT: same as the supraspinatus)?

Answer 14

Suprascapular n.

Question 15

What is the proximal attachment of the teres major?

Answer 15

Inferior angle of the scapula

Question 16

What is the distal attachment of the teres major?

Answer 16

Medial lip of the intertubercular sulcus of the humerus

Question 17

List the 2 actions of the teres major.

Answer 17

1) Adduct humerus
2) Medially rotate humerus

Question 18

What innervates the teres major?

Answer 18

Lower subscapular n.

Question 19

What is the proximal attachment of the teres minor?

Answer 19

Lateral border of the scapula

Question 20

What is the distal attachment of the teres minor?

Answer 20

Inferior facet of the greater tubercle of the humerus

Question 21

What is the only action of the teres minor?

Answer 21

Laterally rotates the humerus

Question 22

What innervates the teres minor (HINT: same as deltoid)?

Answer 22

Axillary n.

Question 23

What is the proximal attachment of the subscapularis?

Answer 23

Subscapular fossa

Question 24

What is the distal attachment of the subscapularis?

Answer 24

Lesser tubercle of the humerus

Question 25

What is the only action of the subscapularis?

Answer 25

Medially rotates the humerus

Question 26

What 2 nerves innervate the subscapularis?

Answer 26

Upper & lower subscapular nn.