Muscles that act on GH joint

Question 1

what movements occur at the GH joint?

Answer 1

flexion, extension, int/ext rotation, ABD, ADD

Question 2

how can you tell if a muscle will flex/internally (medially) rotate the GH joint?

Answer 2

muscles that cross the GH joint anteriorly will perform these movements

Question 3

how can you tell if a muscle will extend/externally (laterally) rotate the GH joint?

Answer 3

muscles that cross the GH joint posteriorly will perform these movements

Question 4

how can you tell if a muscle will ABD the GH joint?

Answer 4

muscles that cross the GH joint superiorly will ABD

Question 5

how can you tell if a muscle will ADD the GH joint?

Answer 5

muscles that cross the GH joint inferiorly will ADD

Question 6

pec major proximal attachment

Answer 6

medial clavicle, sternum, costal cartilage of upper ribs

Question 7

pec major distal attachment

Answer 7

ridge of greater tubercle

Question 8

pec major actions

Answer 8

flex, ADD, IR *extends GH from fully flexed position

Question 9

pec major innervations

Answer 9

medial and lateral pectoral nerves (C5-T1)

Question 10

latissimus dorsi proximal attachment

Answer 10

thoracolumbar fascia

Question 11

latissimus dorsi distal attachment

Answer 11

ridge of lesser tubercle

Question 12

latissimus dorsi actions

Answer 12

extend, ADD, IR *extends GH from fully flexed position

Question 13

what muscle is the latissimus dorsi a synergist with?

Answer 13

pec major - both muscles extend GH from fully flexed position, ADD, and IR

Question 14

what action does the latissimus dorsi antagonize?

Answer 14

flexion done by the pec major

Question 15

latissimus dorsi innervations

Answer 15

thoracodorsal nerve (C6,C7,C8)

Question 16

anterior deltoid proximal attachment

Answer 16

clavicle

Question 17

anterior deltoid distal attachment

Answer 17

deltoid tuberosity

Question 18

anterior deltoid actions

Answer 18

flex, IR *will ADD when inferior to GH

Question 19

anterior deltoid innervations

Answer 19

axillary nerve (C5,C6)

Question 20

superior deltoid proximal attachment

Answer 20

acromion

Question 21

superior deltoid distal attachment

Answer 21

deltoid tuberosity

Question 22

superior deltoid actions

Answer 22

ABD *will ADD when inferior to GH

Question 23

superior deltoid innervations

Answer 23

axillary nerve (C5,C6)

Question 24

posterior deltoid proximal attachment

Answer 24

spine of scapula

Question 25

posterior deltoid distal attachment

Answer 25

deltoid tuberosity

Question 26

posterior deltoid actions

Answer 26

extend, ER *will ADD when inferior to GH

Question 27

posterior deltoid innervations

Answer 27

axillary nerve (C5,C6)

Question 28

supraspinatus proximal attachment

Answer 28

supraspinous fossa

Question 29

supraspinatus distal attachment

Answer 29

greater tubercle (merges w capsule of GH)

Question 30

supraspinatus actions

Answer 30

stabilize GH, ABD *synergist w superior deltoid

Question 31

supraspinatus innervations

Answer 31

suprascapular nerve (C4,C5,C6)

Question 32

infraspinatus proximal attachment

Answer 32

infraspinous fossa

Question 33

infraspinatus distal attachment

Answer 33

greater tubercle (merges w capsule of GH)

Question 34

infraspinatus actions

Answer 34

stabilize GH, ER

Question 35

infrapsinatus innervations

Answer 35

suprascapular nerve (C5,C6)

Question 36

teres minor proximal attachment

Answer 36

lateral border of scapula

Question 37

teres minor distal attachment

Answer 37

greater tubercle (merges w capsule of GH)

Question 38

teres minor actions

Answer 38

stabilize GH, ER

Question 39

teres minor innervations

Answer 39

axillary nerve (C5,C6)

Question 40

subscapularis proximal attachment

Answer 40

subscapular fossa

Question 41

subscapularis distal attachment

Answer 41

ridge of lesser tubercle

Question 42

subscapularis actions

Answer 42

stabilize GH, IR

Question 43

subscapularis innervations

Answer 43

upper and lower subscapular nerves (C5,C6,C7)

Question 44

teres major proximal attachment

Answer 44

inferior angle of scapula

Question 45

teres major distal attachment

Answer 45

ridge of lesser tubercle

Question 46

teres major actions

Answer 46

ADD, IR