Muscles of the Upper Extremity: Scapulohumeral Muscles

Question 1

Anterior Deltoid Proximal Attachment

Answer 1

Lateral end of the clavicle

Question 2

Anterior Deltoid Distal Attachment

Answer 2

Deltoid Tuberosity

Question 3

Anterior Deltoid Innervation

Answer 3

Axillary n. [*C5,C6]

Question 4

Anterior Deltoid Action

Answer 4

Flexes the shoulder
Medially rotates the shoulder
Horizontally adducts the shoulder

Question 5

Middle Deltoid Proximal Attachment

Answer 5

Lateral margin of the acromion process

Question 6

Middle Deltoid Distal Attachment

Answer 6

Deltoid tuberosity

Question 7

Middle Deltoid Innervation

Answer 7

Axillary n. [*C5,C6]

Question 8

Middle Deltoid Acion

Answer 8

Abducts the shoulder

Question 9

Posterior Deltoid Proximal Attachment

Answer 9

Lower lip of the spine of the scapula

Question 10

Posterior Deltoid Distal Attachment

Answer 10

Deltoid tuberosity

Question 11

Posterior Deltoid Innervation

Answer 11

Axillary n. [*C5,C6]

Question 12

Posterior Deltoid Action

Answer 12

Extends the shoulder
Laterally rotates the shoulder
Horizontally abducts the shoulder

Question 13

Supraspinatus Proximal Attachment

Answer 13

Supraspinous fossa

Question 14

Supraspinatus Distal Attachment

Answer 14

Superior facet of the greater tubercle of the humerus

Question 15

Supraspinatus Innervation

Answer 15

Suprascapular n. {*C5,C6]

Question 16

Supraspinatus Action

Answer 16

Abducts the shoulder

Stabilizes the glenohumeral joint

Question 17

Infraspinatus Proximal Attachment

Answer 17

Infraspinous fossa

Question 18

Infraspinatus Distal Attachment

Answer 18

Middle facet of the greater tubercle of the humerus

Question 19

Infraspinatus Innervation

Answer 19

Suprascapular n. {*C5,C6]

Question 20

Infraspinatus Action

Answer 20

Laterally rotates the shoulder

Stabilizes the glenohumeral joint

Question 21

Teres Minor Proximal Attachment

Answer 21

Upper and middle portions of the lateral border of the scapula

Question 22

Teres Minor Distal Attachment

Answer 22

Inferior facet of the greater tubercle of the humerus

Question 23

Teres Minor Innervation

Answer 23

Axillary n. [*C5,C6]

Question 24

Teres Minor Action

Answer 24

Laterally rotates the shoulder

Stabilizes the glenohumeral joint

Question 25

Subscapularis Proximal Attachment

Answer 25

Subscapular fossa

Question 26

Subscapularis Distal Attachment

Answer 26

Lesser tubercle of humerus

Question 27

Subscapularis Innervation

Answer 27

Upper and lower subscapular nn. [C5,*C6]

Question 28

Subscapularis Action

Answer 28

Medially rotates the shoulder

Stabilizes the glenohumeral joint

Question 29

Teres Major Proximal Attachment

Answer 29

Lower portion of the lateral border of the scapula

Question 30

Teres Major Distal Attachment

Answer 30

Medial lip of the intertubercular groove of the humerus

Question 31

Teres Major Innervation

Answer 31

Lower subscapular n. [C5,*C6]

Question 32

Teres Major Action

Answer 32

Extends the shoulder
Adducts the shoulder
Medially rotates the shoulder

Question 33

Coracobrachialis Proximal Attachment

Answer 33

Coracoid process of the scapula

Question 34

Coracobrachialis Distal Attachment

Answer 34

Midway along the medial surface of the shaft of the humerus

Question 35

Coracobrachialis Innervation

Answer 35

Musculocutaneous n. [C5,*C6,C7]

Question 36

Coracobrachialis Action

Answer 36

Flexes the shoulder

Adducts the shoulder