Upper limb

Question 1

Subscapularis O,I,A,I

Answer 1

O: subscapular fossa

I: lesser tubercle of humerus

A: internal rotation of humerus

I: Upper and lower subscapular nerve (C5,6)

Question 2

Supraspinatus O,I,A,I

Answer 2

O: supraspinous fossa

I: superior aspect of the greater tubercle

A: initial abduction of the humerus (then deltoid takes over)

I: suprascapular nerve (C5,6)

Question 3

Infraspinatus O,I,A,I

Answer 3

O: infraspinous fossa

I: posterior of the greater tubercle

A: external rotation of shoulder

I: suprascapular nerve (C5,6)

Question 4

Teres minor

Answer 4

O: posterolateral edge of scapula

I: posterior of greater tubercle (below infraspinatus)

A: External rotation of humerus

I: Axillary nerve (C5,6)

Question 5

Deltoid O,I,A,I

Answer 5

O: lateral clavicle, acromion process, lateral aspect of the spine of the scapula

I: deltoid tuberosity of the humerus

A: abduction (after supraspinatus helps), flexion, and extension of humerus

I: Axillary

Question 6

Pectoralis major O,I,A,I

Answer 6

O: medial clavicle anterior chest wall

I: lateral lip of the bicipital groove

A: internal rotation and flexion of humerus

I: medial and lateral pectoral nerves

Question 7

Latissimus dorsi O,I,A,I

Answer 7

O: thoracolumbar fascia

I: medial lip of the bicipital groove

A: internal rotation and extension of the humerus

I: thoracodorsal nerve

Question 8

Teres major O,I,A,I

Answer 8

O: lateral scapula

I: medial lip of the bicipital groove

A: internal rotation and extension of humerus

I: lower subscapular

Question 9

Biceps brachii O,I,A,I

Answer 9

O: LH- supraglenoid tubercle; SH- coracoid process

I: radial tuberosity (one other that helps supinate)

A: Flexion at shoulder and elbow and supination at elbow

I: musculocutaneous

Question 10

What are extrinsic muscles of the hand? Intrinsic muscles of the hand?

Answer 10

extrinsic muscles of the hand are found on the forearm (flexors and extensors)

intrinsic muscles of the hand are found in the hand

Question 11

Where is the thenar eminence? hypothenar eminence?

Answer 11