Dissection 10: Posterior Shoulder & Rotator Cuff

Question 1

name the bones of the pectoral girdle

Answer 1

scapula
clavicle
manubrium of the sternum

Question 2

name the 3 joints that attach the upper limb to the appendicular skeleton

Answer 2

glenohumeral joint
acromioclavicular
sternoclavicular

Question 3

most common area of the clavicle to fracture?

Answer 3

middle third

Question 4

most common areas of the humerus to fracture?

Answer 4

surgical neck

mid-shaft

Question 5

which joint of the pectoral girdle commonly subluxes/dislocates?

Answer 5

acromioclavicular

Question 6

most common rotator cuff injury?

Answer 6

partial/complete tear of the supraspinatous tendon

Question 7

what part of the deltoid muscle is responsible for extension of the shoulder?

Answer 7

posterior/spinal

Question 8

what part of the deltoid muscle is responsible for abduction of the shoulder

Answer 8

middle/acromial

Question 9

what part of the deltoid muscle is responsible for flexion at the shoulder?

Answer 9

anterior/clavicular

Question 10

name the 3 regions of the trapezius?

Answer 10

acscending
middle
descending

Question 11

what bone is the trapezius muscle responsible for moving?

Answer 11

scapula

Question 12

what does the ascending part of the trapezius do?

Answer 12

superior rotation of glenoid fossa
scapular depression (downward shrug)

Question 13

what does the descending part of the trapezius do?

Answer 13

superior rotation of glenoid fossa
scapular elevation (upward shrug)

Question 14

what does the middle part of the scapula do?

Answer 14

scapular retraction/adduction

Question 15

what does the levator scapulae do?

Answer 15

elevates scapula

inferior rotation of glenoid fossa

Question 16

what does the rhomboid major do?

Answer 16

retracts/adducts scapula

inferior rotation of glenoid fossa

Question 17

what does the rhomboid minor do

Answer 17

retraction of scapula

inferior rotation of glenoid fossa

Question 18

what is the mnemonic for the muscles of the rotator cuff?

Answer 18

SITS

Question 19

name the muscles of the rotator cuff

Answer 19

supraspinatous
infraspinatous
teres minor
subscapularis

Question 20

what muscles abducts the shoulder up to 15 degrees?

Answer 20

supraspinatous

Question 21

what muscle takes over abduction of the shoulder after 15 degrees?

Answer 21

middle part of deltoid muscle

Question 22

what is the function of the infraspinatous muscle?

Answer 22

stabilise head of humerus in glenoid

lateral rotation of shoulder

Question 23

what is the function of the teres minor

Answer 23

stabilise head of humerus in glenoid

lateral rotation of shoulder

Question 24

what muscle is responsible for adduction and medial rotation of the shoulder?

Answer 24

teres major

Question 25

what would happen if you couldnt superiorly rotate the scapula?

Answer 25

wouldnt be able to abduct arm

Question 26

proximal attachment of the rotator cuff muscles?

Answer 26

scapula

Question 27

distal attachment of the rotator cuff muscles?

Answer 27

tubercles of the head of the humerus

Question 28

which rotator cuff muscle medially rotates the humerus?

Answer 28

subscapularis

Question 29

where do the nerves supplying the rotator cuff come from?

Answer 29

brachial plexus

Question 30

impingement of what tendon can lead to painful arc syndrome?

Answer 30

supraspinatous