Shoulder

Question 1

Supraspinatus

Answer 1

O: supraspinus fossa of scapula
I: greater tubercle of humerus
A: abduction, stabilise ghj

Question 2

Infraspinatus

Answer 2

O: infraspinous fossa of scapula
I: greater tubercle of humerus
A: lateral rotation, transverse abduction, stabilise ghj

Question 3

Teres minor

Answer 3

O: posterior aspect of superior half of lateral border of scapula
I: greater tubercle of humerus
A: lateral rotation, transverse abduction, stabilise ghj

Question 4

Subscapularis

Answer 4

O: subscauplar fossa of scapula
I: lesser tubercle of humerus
A: medial rotation, stabilise ghj

Question 5

Subclavius

Answer 5

Very small muscle under clavicle
O: superior surface of costal end of first rib and adjacent first costal cartilage
I: inferior surface of the middle one third of clavicle
A: stabilise clavicle

Question 6

Coracobrachialis

Answer 6

O: coracoid process of scapula
I: middle third of medial aspect of humerus
A: adduction, flexion at ghj

Question 7

Teres major

Answer 7

O: posterior aspect of inferior angle of scapula
I: crest of lesser tubercle of humerus
A: adduction, medial rotation

Question 8

Serratus anterior

Answer 8

O: external surface of first to ninth rib
I: medial border of scapula
A: protract and upwardly rotate pectoral girdle

Question 9

Rhomboid minor

Answer 9

O: nuchal ligament and spinous processes of C7-T1
I: medial border of scapula, adjacent to spine of scapula
A: retraction and downward rotation of shoulder girdle

Question 10

Rhomboid major

Answer 10

O: spinous processes of T2-T5
I: medial border of scapula, inferior to spine of scapula
A: Retraction and downward rotation of shoulder girdle

Question 11

Levator scapulae

Answer 11

O: transverse processes of C1-C2, posterior tubercles of transverse processes of C3-C4
I: superior angle of scapula, medial border of scapula superior to spine of scapula
A: elevation and downward rotation of shoulder girdle, extension and lateral flexion of neck

Question 12

Pec minor

Answer 12

O: anterior ends of third to fifth ribs
I: coracoid process of scapula
A: protraction and downward rotation of shoulder girdle

Question 13

Pec major

Answer 13

O: clavicular head - anterior aspects of medial half of clavicle;
:sternocostal head - manubrium, sternal body, true ribs and their costal cartilages
:abdominal part - external abdominal oblique aponeurosis
I: crest of greater tubercle of humerus
A: adduction, medial rotation, transverse adduction, depression of shoulder girdle

Question 14

Anterior deltoid (clavicular part of deltoid)

Answer 14

O: lateral one third of clavicle
I: deltoid tuberosity of humerus
A: flexion and medial rotation

Question 15

Middle deltoid (acromial part of deltoid)

Answer 15

O: acromion of scapula
I: deltoid tuberosity of humerus
A: abduction

Question 16

Posterior deltoid (scapular spinal part of deltoid)

Answer 16

O: spine of scapula
I: deltoid tuberosity of humerus
A: extension, lateral rotation, transverse abduction

Question 17

Long head triceps brachii

Answer 17

O: infraglenoid tubercle of scapula
I: olecranon of ulna and adjacent antebrachial fascia
A: elbow extension

Question 18

Lateral head of triceps brachii

Answer 18

O: posterior surface of humerus, superior to radial groove
I: olecranon of ulna and adjacent antebrachial fascia
A: elbow extension

Question 19

Medial head of triceps brachii

Answer 19

O: posterior surface of humerus, inferior to radial groove
I: olecranon of ulna and adjacent antebrachial fascia
A: elbow extension

Question 20

Long head of bicep brachii

Answer 20

O: supraglenoid tubercle of scapula
I: radial tuberosity and antebrachial fascia
A: forearm supination, elbow flexion (elbow flexion most effective when forearm is supinated)

Question 21

Short head of biceps brachii

Answer 21

O: apex of coracoid process of scapula
I: radial tuberosity and antebrachial fascia
A: forearm supination, elbow flexion (elbow flexion most effective when forearm is supinated)

Question 22

Ascending part of trapezius

Answer 22

O: spinous processes of T5-T12
I: medial end of spine of scapula
A: shoulder depression, retraction, upward rotation (acromioclavicular and sternoclavicular joints)

Question 23

Transverse part of trapezius

Answer 23

O: spinous processes of C7-T4
I: acromion of scapula, lateral end of spine of scapula
A: shoulder retraction (acromioclavicular and sternoclavicular joints)

Question 24

Descending part of trapezius

Answer 24

O: external occipital protuberance and superior nuchal line of occipital bone, nuchal ligament, spinous process of C7
I: posterior aspect of lateral 1/3 of clavicle, acromion of scapula
A: shoulder elevation, retraction, upward rotation (acromioclavicular and sternoclavicular joint), neck/head extension and lateral flexion