O/I/A/NS Final 2

Question 1

supraspinatus (O/I)

Answer 1

O: supraspinous fossa and spine of scapula
I: greater and lesser tubercles of humerus

Question 2

infraspinatus (O/I)

Answer 2

O: infraspinous fossa
I: greater tubercle of the humerus

Question 3

deltoideus (O/I)

Answer 3

O: spine of scapula and aponeurosis over infraspinatus muscle
I: deltoid tuberosity of the humerus

Question 4

subscapularis (O/I)

Answer 4

O: subscapular fossa
I: lesser tubercle of the humerus

Question 5

biceps brachii (O/I)

Answer 5

O: supraglenoid tubercle
I: radial tuberosity, and tendon of extensor carpi radialis via lacertus fibrosus

Question 6

triceps brachii, long head (O/I)

Answer 6

O: caudal border of the scapula
I: olecranon

Question 7

triceps brachii, lateral head (O/I)

Answer 7

O: lateral surface of the humerus
I: olecranon

Question 8

triceps brachii, medial head (O/I)

Answer 8

O: medial surface of the humerus
I: olecranon

Question 9

supraspinatus (A/NS)

Answer 9

A: extend the shoulder, cranial shoulder stabilizer
NS: suprascapular n.

Question 10

infraspinatus (A/NS)

Answer 10

A: abduct the arm (also acts as a lateral collateral lig. of the shoulder joint)
NS: suprascapular n.

Question 11

deltoideus (A/NS)

Answer 11

A: flex the shoulder and abduct the arm
NS: axillary (DTT)

Question 12

subscapularis A/NS)

Answer 12

A: adduct the humerus, medial shoulder stabilizer
NS: subscapular and axillary nn.

Question 13

biceps brachii (A/NS)

Answer 13

A: flex the elbow, extend the shoulder and carpus
NS: musculocutaneous n. (proximal br.)

Question 14

triceps brachii, long head (A/NS)

Answer 14

A: extend the elbow and flex the shoulder
NS: radial n.

Question 15

triceps brachii, lateral head (A/NS)

Answer 15

A: extend the elbow
NS: radial n.

Question 16

triceps brachii, medial head (A/NS)

Answer 16

A: extend the elbow
NS: radial n.