The Shoulder Joint Flexors

Question 1

Name The Shoulder Joint Flexors

Answer 1

Pectoralis Major, Deltoid (Ant), Biceps Brachii ,(L/H), Coracobrachialis.

Question 2

Pectoralis major origin

Answer 2

Medial half of the anterior border of the clavicle, anterior surface of the sternum, anterior surface of the upper 6 costal cartilages and the 6th rib.

Question 3

Pectoralis major insertion

Answer 3

Laminated tendon into lateral lip intertubercular groove

Question 4

Pectoralis major nerve supply

Answer 4

Medial (C8-T1) and lateral (C5, 6, 7) pectoral nerves.

Question 5

Pectoralis major action

Answer 5

Flexes, medially rotates and adducts the arm at the shoulder.
Sternocostal fibres only: extend humerus from a flexed position

Question 6

Pectoralis major function

Answer 6

Pushing, punching and throwing.

Question 7

Deltoid (Ant) origin

Answer 7

Anterior border of the lateral third of the clavicle.

Question 8

Deltoid (Ant) insertion

Answer 8

Deltiod tuberosity of the humerus.

Question 9

Deltoid (Ant) nerve supply

Answer 9

Axillary nerve c5 6.

Question 10

Deltoid (Ant) action

Answer 10

Flex and medially rotate the shoulder.

Question 11

Deltoid (Ant) function

Answer 11

reaching

Question 12

Biceps brachii origin

Answer 12

Long head: supraglenoid tubercle of the scapula

Question 13

Biceps brachii insertion

Answer 13

(proximal, ventral) radial tuberosity and the deep fascia of the forearm via the bicipital aponeurosis

Question 14

Biceps brachii nerve supply

Answer 14

musculocutaneous nerve C5, 6

Question 15

Biceps brachii action

Answer 15

shoulder and elbow flexion & forearm supination

Question 16

Biceps brachii function

Answer 16

turning a door handle

Question 17

Coracobrachialis origin

Answer 17

Apex coracoid process

Question 18

Coracobrachialis insertion

Answer 18

Medial side shaft of humerus

Question 19

Coracobrachialis nerve supply

Answer 19

musculocutaneous C6, 7

Question 20

Coracobrachialis action

Answer 20

shoulder flexion & adduction

Question 21

Coracobrachialis function

Answer 21

backstroke