Muscles that move the glenohumeral joint / arm

Question 1

Origin of deltoid - anterior fibres?

Answer 1

Lateral clavicle.

Question 2

Origin of deltoid - middle fibres?

Answer 2

Acromion process.

Question 3

Origin of deltoid - posterior fibres?

Answer 3

Spine of scapula.

Question 4

Insertion of all deltoid fibres?

Answer 4

Deltoid tuberosity.

Question 5

Action/s of deltoid - anterior fibres?

Answer 5

Flexion, medial rotation, horizontal flexion.

Question 6

Action/s of deltoid - middle fibres?

Answer 6

Abduction.

Question 7

Action/s of deltoid - posterior fibres?

Answer 7

Extension, lateral rotation, horizontal extension.

Question 8

Origin of pectoralis major - clavicular head?

Answer 8

Medial clavicle.

Question 9

Origin of pectoralis major - sternal head?

Answer 9

Sternum and costal cartilages.

Question 10

Insertion of both heads of pectoralis major?

Answer 10

Lateral intertubercular sulcus.

Question 11

Action/s of pectoralis major - clavicular head?

Answer 11

Flexion…also, adduction, horizontal flexion and medial rotation for two heads.

Question 12

Action/s of pectoralis major - sternal head?

Answer 12

Extension…also, adduction, horizontal flexion and medial rotation for two heads.

Question 13

Origin of latissimus dorsi?

Answer 13

Thoracolumbar vertebra, iliac crest.

Question 14

Insertion of latissimus dorsi?

Answer 14

Intertubercular sulcus.

Question 15

Action/s of latissimus dorsi?

Answer 15

Extension, adduction, medial rotation.

Question 16

Origin of teres major?

Answer 16

Lateral border and inferior angle scapula.

Question 17

Insertion of teres major?

Answer 17

Medial intertubercular sulcus.

Question 18

Origin of supraspinatus?

Answer 18

Supraspinous fossa.

Question 19

Origin of infraspinatus?

Answer 19

Infraspinous fossa.

Question 20

Origin of teres minor?

Answer 20

Lateral border scapula.

Question 21

Insertion of supraspinatus, infraspinatus and teres minor?

Answer 21

Greater tubercle of humerus.

Question 22

Action/s of supraspinatus?

Answer 22

Abduction.

Question 23

Action/s of infraspinatus and teres minor?

Answer 23

Lateral rotation.

Question 24

Origin of subscapularis?

Answer 24

Subscapular fossa.

Question 25

Insertion of subscapularis?

Answer 25

Lesser tubercle of humerus.

Question 26

Action/s of subscapularis?

Answer 26

Medial rotation.

Question 27

Origin of coracobrachialis?

Answer 27

Coracoid process.

Question 28

Insertion of coracobrachialis?

Answer 28

Proximal humerus.

Question 29

Action/s of coracobrachialis?

Answer 29

Flexion and adduction.

Question 30

Origin of biceps brachii - long head?

Answer 30

Supraglenoid tubercle.

Question 31

Origin of biceps brachii - short head?

Answer 31

Coracoid process.

Question 32

Insertion of two heads of biceps brachii?

Answer 32

Radial tuberosity.

Question 33

Action/s of biceps brachii - long head?

Answer 33

Extension...and flexion for both heads.

Question 34

Action/s of biceps brachii - short head?

Answer 34

Adduction...and flexion for both heads.

Question 35

Action/s of teres major?

Answer 35

Medial rotation.