Posterior Shoulder and Rotator Cuff

Question 1

what bones make up pectoral girdle?

Answer 1

scapula
clavicles
manubrium of sternum

Question 2

functions of pectoral girdle?

Answer 2

allows increased range of movement for hand functions

stabalised by providing attachment points for ligaments and muscles

helps maintain relatively lateral position of upper limb

Question 3

name the muscles/muscle parts that attach between that scapula and humerus

Answer 3

deltoid
trapezius
lavator scapulae
rhomboid major
rhomboid minor
supraspinatus
infraspinatus
teres minor
subscapularis

Question 4

what are the rotator cuff muscles?

Answer 4

supraspinatus
infraspinatus
teres minor
subscapularis

Question 5

what nerve supplies the deltoid?

Answer 5

axillary

Question 6

actions of deltoid?

Answer 6

shoulder extension
shoulder abduction
shoulder flexion

Question 7

what nerve supplies the trapezius?

Answer 7

spinal accessory nerve (CN XI)

Question 8

action of trapezius?

Answer 8

scapular depression, retraction and elevation

Question 9

what is the nerve supply to levator scapulae?

Answer 9

dorsal scapular nerve ( C4 , C5)

and cervical nerves C3 and C4

Question 10

what action does levator scapulae do?

Answer 10

elevation of scapula and inferior rotation of glenoid fossa

Question 11

what nerve supplies rhomboid major?

Answer 11

dorsal scapular nerve

Question 12

actions of rhomboid major?

Answer 12

retraction of scapula and inferior rotation of glenoid fossa

Question 13

nerve supply of rhomboid minor?

Answer 13

dorsal scapular nerve

Question 14

action of rhomboid minor?

Answer 14

retraction of scapula and inferior rotation of glenoid fossa

Question 15

nerve supply of supraspinatus?

Answer 15

suprascapular nerve and C4

Question 16

action of supraspinatus?

Answer 16

first 15 degrees of abduction

Question 17

nerve supply of infraspinatus?

Answer 17

suprascapular nerve

Question 18

action of infraspinatus?

Answer 18

stabilize head of humerus in glenoid fossa and lateral rotation of shoulder

Question 19

nerve supply of teres minor?

Answer 19

axillary nerve

Question 20

action of teres minor?

Answer 20

stabilize head of humerus in glenoid fossa and lateral rotation of shoulder

Question 21

nerve supply for subscapularis?

Answer 21

upper and lower subscapular nerves

Question 22

action of subscapularis?

Answer 22

medial rotation

Question 23

most common rotator cuff injury?

Answer 23

partial/complete tear of supraspinatus tendon