Anatomy - Shoulder Muscles

Front 1

Origin of Deltoid

Back 1

lateral third of clavicle, acromion, spine of scapula

Front 2

Insertion of deltoid

Back 2

deltoid tuberosity of humerus

Front 3

Innervation of deltoid

Back 3

axillary nerve

Front 4

Blood supply to deltoid

Back 4

deltoid branch of thoracoacromial artery and posterior circumflex humeral artery

Front 5

Function of deltoid

Back 5

abducts, adducts, flexes, extends, rotates arm medially and laterally

Front 6

Origin of supraspinatus

Back 6

supraspinous fossa

Front 7

Insertion of supraspinatus

Back 7

superior facet of greater tubercle

Front 8

Innervation of supraspinatus

Back 8

suprascapular nerve

Front 9

Blood supply of supraspinatus

Back 9

suprascapular artery

Front 10

Function of supraspinatus

Back 10

initiates abduction and hold humerus in glenoid cavity

Front 11

Origin of infraspinatus

Back 11

infraspinous fossa

Front 12

Insertion of infraspinatus

Back 12

middle facet of greater tubercle

Front 13

Innervation of infraspinatus

Back 13

suprascapular nerve

Front 14

Blood supply of infraspinatus

Back 14

suprascapular artery and scapular circumflex artery

Front 15

Function of infraspinatus

Back 15

laterally rotate humerus and hold it in glenoid cavity

Front 16

Origin of subscapularis

Back 16

subscapular fossa

Front 17

Insertion of subscapularis

Back 17

lesser tubercle

Front 18

Innervation of subscapularis

Back 18

upper and lower subscapular nerves

Front 19

Blood supply to subscapularis

Back 19

subscapular artery

Front 20

Function of subscapularis

Back 20

medially rotates arm

Front 21

Origin of teres major

Back 21

dorsal surface of inferior angle of scapula

Front 22

Insertion of teres major

Back 22

medial lip of bicipital groove

Front 23

Innervation of teres major

Back 23

lower subscapular nerve

Front 24

Blood supply to teres major

Back 24

thoracodorsal artery

Front 25

Function of teres major

Back 25

adducts and medially rotates arm

Front 26

Origin of teres minor

Back 26

upper portion of lateral border of scapula

Front 27

Insertion of teres minor

Back 27

lower facet of greater tubercle

Front 28

Innervation of teres minor

Back 28

axillary nerve

Front 29

Blood supply to teres minor

Back 29

scapular circumflex artery

Front 30

Function of teres minor

Back 30

rotates arm laterally

Front 31

Borders of quadrangular space

Back 31

inferior margin of teres minor
surgical neck of humerus
superior margin of teres major
lateral margin of long head of triceps

Front 32

Contents of quadrangular space

Back 32

axillary nerve, posterior circumflex humeral artery and vein

Front 33

Borders of triangular space

Back 33

medial margin of long head of triceps
superior margin of teres major
inferior margin of teres minor

Front 34

Contents of triangular space

Back 34

circumflex scapular artery and vein

Front 35

Borders of triangular interval

Back 35

lateral margin of long head of triceps
shaft of humerus
inferior margin of teres major

Front 36

Contents of triangular interval

Back 36

radial nerve, profunda brachii artery and associated veins

Front 37

branches of 1st part of axillary artery

Back 37

superior thoracic artery

Front 38

branches of 2nd part of axillary artery

Back 38

thoraco-acromial artery
lateral thoracic artery

Front 39

branches of 3rd part of axillary artery

Back 39

subscapular artery
anterior and posterior circumflex humeral arteries