Upper Extremity 1st Part

Question 1

Origin of the Sternocleidomastoid

Answer 1

Superior anterior surface of manubrium + Superior surface of medial third of clavicle

Question 2

Insertion of the Sternocleidomastoid

Answer 2

Lateral surface of mastoid process of temporal bone and nuchal line of occipital bone

Question 3

Function of the Sternocleidomastoid

Answer 3

Elevation of clavicle and manubrium of sternum at sternoclavicular joint + flex. + lateral flex. + ext. of the neck + contralateral rotation of the head

Question 4

Origin of the Subclavius

Answer 4

Junction of first rib and costal cartilage

Question 5

Insertion of the Subclavius

Answer 5

Posterior inferior surface of middle third of clavicle

Question 6

Function of the Subclavius

Answer 6

Depresses clavicle down and forward at the sternoclavicular joint

Question 7

Origin of the Teres Major

Answer 7

Inferior angle of scapula

Question 8

Insertion of the Teres Major

Answer 8

Intertubercular groove of the humerus

Question 9

Function of the Teres Major

Answer 9

Ext. + adduction + Int. Rota. + horizontal abduction of the arm at the shoulder joint + stabilisation of the shoulder / glenohumeral joint

Question 10

Origin of the Teres Minor

Answer 10

Lateral border of scapula

Question 11

Insertion of the Teres minor

Answer 11

Greater tubercle of humerus

Question 12

Function of the Teres Minor

Answer 12

Ext. rota. + Adduction + Horizontal abduction of the arm at shoulder joint + stabilises shoulder/ glenohumeral joint

Question 13

Origin of the Infraspinatus

Answer 13

Infraspinous fossa of posterior surface of scapula

Question 14

Insertion of the Infraspinatus

Answer 14

Greater tubercle of humerus

Question 15

Function of the Infraspinatus

Answer 15

Ext. Rota. + abduction + horizontal abduction of arm at shoulder joint + stabilises shoulder/glenohumeral joint

Question 16

Origin of the Supraspinatus

Answer 16

Supraspinatous fossa of scapula

Question 17

Insertion of the Supraspinatus

Answer 17

The greater tubercle of humerus

Question 17

Function of the Supraspinatus

Answer 17

Abduction of the arm at shoulder joint + stabilises shoulder/glenohumeral joint

Question 18

Origin of the Serratus Anterior

Answer 18

Ribs 1-9

Question 19

Insertion of the Serratus Anterior

Answer 19

Medial border of scapula

Question 20

Function of the Serratus Anterior

Answer 20

Depression + abduction + upward rota. of the scapula at the scapulothoracic joint + elevation of ribs when scapula is fixed

Question 21

Origin of the Subscapularis

Answer 21

Subscapular fossa of scapula

Question 22

Insertion of the Subscapularis

Answer 22

Lesser tubercle of humerus

Question 23

Function of the Subscapularis

Answer 23

Int. rota. of the arm at shoulder/glenohumeral joint + prevent anterior displacement of humerus

Question 24

Origin of the Levator Scapulae

Answer 24

Transvers process of vertebrae C1-C4

Question 25

Insertion of the Levator Scapulae

Answer 25

Superior part of medial border of scapula

Question 26

Function of the Levator Scapulae

Answer 26

Elevation and downa=ward rota. of scapula at scapulothoracic joint

Question 27

Origin of the Rhomboid Major

Answer 27

Spinous process of vertebrae T2 - T5 + Ligamentum nuchae

Question 28

Insertion of the Rhomboid Major

Answer 28

Medial border of scapula inferior to scapular spine

Question 29

Function of the Rhomboid Major

Answer 29

Adduction + downward rota. + elevation of the scapula at scapulothoracic joint + stabilises the scapula