Shoulder

Question 1

Trapezius (upper, middle, lower: A)

Answer 1

O: occiput, ligamentum nuchae and spinous processes of C7-T12

I: lateral third of clavicle, acromion and spine of scapula

A (upper): scapular elevation, lateral flexion to same side, rotation to opposite side

A (middle): scapular retraction and stabilization

A (lower): scapular depression and upward rotation

N: spinal portion of cranial nerve XI

Question 2

Levator scapula

Answer 2

O: transverse processes of C1-C4

I: medial border of scapula, between superior angle and superior portion of spine of scapula

A: scapular elevation, downward rotation, lateral neck flexion and rotation to same side

N: cervical and dorsal scapular

Question 3

Rhomboid minor

Answer 3

O: spinous processes of C7-T1

I: upper portion of medial border across from spine of scapula

A: scapular retraction, elevation, downward rotation

N: dorsal scapular

Question 4

Rhomboid Major

Answer 4

O: spinous processes of T2-T5

I: medial border of scapula between spine and inferior angle

A: scapular retraction, elevation, downward rotation

N: dorsal scapular

Question 5

Latissimus dorsi

Answer 5

O: inferior angle of scapula, spinous processes of T6-T12, ribs 9-12, thoracolumbar aponeurosis and posterior iliac crest

I: intertubercular groove of humerus

A: shoulder extension, internal rotation, adduction

N: thoracodorsal

Question 6

Teres Major

Answer 6

O: inferior angle and lower 1/3 of lateral border of scapula

I: crest of lesser tubercle

A: shoulder extension, internal rotation, adduction

N: subscapular

Question 7

Serratus anterior

Answer 7

O: external surfaces of first nine ribs

I: anterior surface of medial border of scapula

A: scapular protraction, upward rotation, depression

N: long thoracic

Question 8

Pectoralis Major

Answer 8

O: medial half of clavicle, sternum, cartilage of first six ribs

I: crest of greater tubercle

A: horizontal adduction and internal rotation

N: lateral and medial pectoral

Question 9

Pectoralis minor

Answer 9

O: ribs 3-5

I: medial surface of coracoid process

A: scapular depression, downward rotation, protraction

N: medial pectoral nerve

Question 10

Subscapularis

Answer 10

O: subscapular fossa

I: lesser tubercle

A: internal rotation

N: subscapular

Question 11

Supraspinatus

Answer 11

O: supraspinous fossa

I: greater tubercle

A: external rotation and abduction

N: suprascapular

Question 12

Infraspinatus

Answer 12

O: infraspinous fossa

I: greater tubercle

A: external rotation and adduction

N: suprascapular

Question 13

Teres minor

Answer 13

O: upper 2/3 of lateral border of scapula

I: greater tubercle

A: external rotation and adduction

N: axillary

Question 14

Deltoids

Answer 14

O: lateral third of clavicle, acromion, spine of scapula

I: deltoid tuberosity

A anterior: shoulder flexion and abduction

A middle: shoulder abduction

A posterior: shoulder extension and abduction

N: axillary

Question 15

Biceps brachii

Answer 15

O short: coracoid process

O long: supraglenoid tubercle

I: radial tuberosity and biceps brachii aponeurosis

A: shoulder and elbow flexion, forearm supination

N: musculocutaneous

Question 16

Coracobrachialis

Answer 16

O: coracoid process

I: medial surface of mid-humeral shaft

A: shoulder flexion and adduction

N: musculocutaneous

Question 17

Triceps

Answer 17

O long: infraglenoid tubercle

O lateral: posterior surface of proximal half of humerus

O medial: posterior surface of distal half of humerus

I: elecranon process

A long: shoulder and elbow extension, adduction

A lateral: elbow extension

A medial: elbow extension

N: radial