Muscles of the Shoulders

Question 1

Pec Major Origin

Answer 1

Clavicular head: Ant. surface of medial half of calvicle
Sternocostal head:
Ant surface of sternum, superior 6 costal cartilages aponeuro of external oblique muscles

Question 2

Pec Major Insertion

Answer 2

Lateral lip of intertubercular sulcus

Question 3

Pec Major nerves

Answer 3

Lateral and medial pectoral nerves

Question 4

Pec Major B.S.

Answer 4

Thoracoacromial artery

Question 5

Pec Major action

Answer 5

Adduction, medial rotation and flexion of humerus

Question 6

Pec minor origin

Answer 6

3rd to 5th costal cartilage

Question 7

Pec minor insertion

Answer 7

Medial border and superior surface of coracoid process of scapula

Question 8

Pec minor innervation

Answer 8

Medial pectoral nerve

Question 9

Pec minor artery

Answer 9

Thoracromial artery

Question 10

Pec minor action

Answer 10

Stabilization of scapula

Question 11

Serratus Anterior origin

Answer 11

External surface of lateral parts of ribs 1 to 8

Question 12

Serratus Anterior insertion

Answer 12

Ant. surface of medial border of scapula

Question 13

Serratus Anterior nerve

Answer 13

Long thoracic nerve

Question 14

Serratus Anterior blood

Answer 14

Lateral thoracic and thoracodorsal

Question 15

Serratus Anterior action

Answer 15

Protraction and rotation of scapula

Question 16

Lat Dorsi origin

Answer 16

Spinous processes of T7 to T12, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs

Question 17

Lat Dorsi Insertion

Answer 17

Floor of intertubecular sulcus of humerus

Question 18

Lat Dorsi nerve

Answer 18

Thoracordorsal

Question 19

Lat Dorsi blood supply

Answer 19

Thoracordosal artery and branch from subscapular

Question 20

Lat Dorsi action

Answer 20

Extension, adduction, medial rotation of humerus

Question 21

Teres major origin

Answer 21

Posterior surface of inf. angle of scapula

Question 22

Teres major insertion

Answer 22

Medial lip of interubercular sulcus

Question 23

Teres major nerve

Answer 23

Lower subscap

Question 24

Teres major blood supply

Answer 24

Subscap and circumflex scap

Question 25

Teres major action

Answer 25

Adduction and medial rotation of hum.

Question 26

Subscapularis origin

Answer 26

Subscapular fossa

Question 27

Subscapularis insertion

Answer 27

Lesser tubercle of hum.

Question 28

Subscapularis nerve/insertion

Answer 28

Upper and lower subscapular nerve/artery

Question 29

Subscapularis action

Answer 29

Medial rotation and adduction of humerus

Question 30

Trapezius origin

Answer 30

Medial third of nuchal line, nuchal ligament, occiptal protuberance, c7 to t12

Question 31

Trapezius insertion

Answer 31

Lateral 1/3 of clavicle, acromion and spine of scapula

Question 32

Trapezius nerves

Answer 32

Spinal accessory nerve and c3 and c4 spinal nerves

Question 33

Trapezius blood supply

Answer 33

Transverse and superficial cervical arteries

Question 34

Trapezius action

Answer 34

Elevation, depression and retraction of scapula, rotates glenoid cavity superiorly

Question 35

Levator scapulae origin

Answer 35

Posterior tubercules of transverse processes c1-4

Question 36

Levator scapulae insertion

Answer 36

Medial border of scapula

Question 37

Levator scapulae nerves

Answer 37

Dorsal scapular and cervicle nerves

Question 38

Infraspinatus origin

Answer 38

Infraspinour fossa of scap.

Question 39

Infraspinatus insertion

Answer 39

Middle facet of greater tub. of hum.

Question 40

Infraspinatus nerve

Answer 40

Suprascapular

Question 41

Infraspinatus b.s.

Answer 41

circumflex scapular artery, suprascapular

Question 42

Infraspinatus action

Answer 42

Lateral rotation of hum.

Question 43

Supraspinatus origin

Answer 43

Supraspinous fossa of scapula

Question 44

Supraspinatus insertion

Answer 44

superior facet of greater tubercle of hum.

Question 45

Supraspinatus nerve/b.s.

Answer 45

Suprascapular

Question 46

Supraspinatus action

Answer 46

Abduction of hum.

Question 47

Teres minor origin

Answer 47

Middle part of lateral border of scapula

Question 48

Teres minor insertion

Answer 48

middle facet

Question 49

Teres minor nerve/b.s.

Answer 49

circumflex scapular, suprascapular

Question 50

Teres minor action

Answer 50

Lat rotation of hum.

Question 51

Rhomoid major origin

Answer 51

t2-t5

Question 52

Rhomoid major/minor insertion

Answer 52

Medial border of scap.

Question 53

Rhomoid major/minor b.s./nerve

Answer 53

Dorsal scap.

Question 54

Rhomoid major and minor action

Answer 54

Retraction, rotation of scapula to depress glenoid cavity, fixation of scapula

Question 55

Rhomoid minor origin

Answer 55

Nuchal ligament and c7-t1

Question 56

Deltoid origin

Answer 56

Lateral 3rd of clavicle, acromion, and spine of scapula

Question 57

Deltoid insertion

Answer 57

Deltoid tuberosity

Question 58

Deltoid nerve

Answer 58

Axillary

Question 59

Deltoid artery

Answer 59

Thoracromial & anterior and posterior circumflex humeral arteries

Question 60

Deltoid action

Answer 60

Flex, abd., ext., lat rotation, medial rotation of humerus