Muscles of the shoulder joint

Question 1

muscles of the shoulder joint

Answer 1

deltoid, pectoralis major, latissimus dorsi, teres major, supraspinatus, infraspinatus, teres minor,subscapularis, coracobrachialis, biceps brachii, triceps brachii

Question 2

action of anterior deltoid muscle

Answer 2

shoulder abduction, flexion, medial rotation, horizontal adduction

Question 3

origin of anterior deltoid muscle

Answer 3

lateral 3rd of the clavicle

Question 4

insertion of anterior deltoid muscle

Answer 4

deltoid tuberosity

Question 5

action of the middle deltoid muscle

Answer 5

shoulder abduction

Question 6

origin of middle deltoid muscle

Answer 6

acromion process

Question 7

insertion of the middle deltoid muscle

Answer 7

deltoid tuberosity

Question 8

action of the posterior deltoid muscle

Answer 8

shoulder abduction, extension, hyperextension, lateral rotation, horizontal abduction

Question 9

origin of the posterior deltoid

Answer 9

spine of scapula

Question 10

insertion of posterior deltoid

Answer 10

deltoid tuberosity

Question 11

action of clavicular portion of the pectoralis major muscle

Answer 11

shoulder flexion-first 60 degrees

Question 12

origin of clavicular portion of the pectoralis major

Answer 12

middle of the third clavicle

Question 13

insertion of clavicular portion of pectoralis major

Answer 13

lateral lip of bicipital groove of humerus

Question 14

action of sternal portion of pectoralis major

Answer 14

shoulder extension-first 60 degrees

Question 15

origin of sternal portion of pectoralis major

Answer 15

sternum, costal cartilage of first 6 ribs

Question 16

insertion of sternal portion of pectoralis major

Answer 16

lateral lip of bicipital groove of humerus

Question 17

action of latissimus dorsi

Answer 17

shoulder extension, adduction, medial rotation, hyper extension

Question 18

origin of latissimus dorsi

Answer 18

spinous process of T7 through L5, posterior surface of sacrum, iliac crest, lower 3 ribs

Question 19

insertion of latissimus dorsi

Answer 19

medial floor of bicipital groove of humerus

Question 20

action of teres major

Answer 20

shoulder extension, adduction, and medial rotation

Question 21

origin of teres major

Answer 21

axillary border of scapula near the inferior angle

Question 22

insertion of teres major

Answer 22

crest below lesser tubercle inferior to the latissimus dorsi muscle attachment

Question 23

action of supraspinatus muscle

Answer 23

shoulder abduction

Question 24

origin of supraspinatus muscle

Answer 24

supraspinous fossa of the scapula

Question 25

insertion of supraspinatus

Answer 25

greater tubercle of the humerus

Question 26

action of infraspinatus

Answer 26

shoulder lateral rotation, horizontal abduction

Question 27

origin of infraspinatus

Answer 27

infraspinous fossa of scapula

Question 28

insertion of infraspinatus

Answer 28

greater tubercle of humerus

Question 29

action of teres minor

Answer 29

shoulder lateral rotation, horizontal abduction

Question 30

origin of teres minor

Answer 30

axillary border of scapula

Question 31

insertion of teres minor

Answer 31

greater tubercle of humerus

Question 32

action of the subscapularis

Answer 32

shoulder medial rotation

Question 33

origin of the subscapularis

Answer 33

subscapular fossa of the scapula

Question 34

insertion of the subscapularis

Answer 34

lesser tubercle of the humerus

Question 35

action of coracobrachialis

Answer 35

stabilizes the shoulder joint

Question 36

origin of the coracobrachilais

Answer 36

coracoid process of the scapula

Question 37

insertion of the coracobrachilais muscle

Answer 37

medial surface of the humerus near the midpoint