Anatomy - Shoulder

Question 1

retroversion of humeral head

Answer 1

35 degrees

Question 2

head/neck angle of humerus

Answer 2

130 degrees

Question 3

where are the greater and lesser tuberosities of the humerus in relation to each other?

Answer 3

greater is lateral, lesser is anterior

Question 4

which muscles insert on the greater tuberosity?

Answer 4

supraspinatus, infraspinatus, teres minor

Question 5

which muscle inserts on the lesser tuberosity?

Answer 5

subscapularis

Question 6

which muscle inserts on the coracoid process?

Answer 6

pec minor

Question 7

which muscles insert on the proximal humerus and in what order?

Answer 7

lateral to medial: pec major, lat, teres major (PLT sandwich)

Question 8

trapezius innervation

Answer 8

cranial nerve XI (accessory)

Question 9

trapezius origin and insertion

Answer 9

O: C7-T12 spinous processes
I: clavicle, acromion/spine of scapula

Question 10

lat innervation

Answer 10

thoracodorsal (C6, 7, 8)

Question 11

lat origin and insertion

Answer 11

O: T7-12, iliac crests
I: intertubercular groove of humerus

Question 12

what is innervated by the dorsal scapular nerve?

Answer 12

levator scapulae, rhomboid major, rhomboid minor

Question 13

what makes up the triangular space?

Answer 13

teres minor, teres major, long head of triceps

Question 14

what is in the triangular space?

Answer 14

circumflex scapular artery

Question 15

what makes up the quadrangular space?

Answer 15

teres minor, teres major, long head of tricpes, medial border of humerus

Question 16

what is in the quadrangular space?

Answer 16

axillary nerve, posterior circumflex artery, humeral artery

Question 17

what makes up the triangular interval?

Answer 17

teres major, long head and lateral head of tricepts

Question 18

what is in the triangular interval?

Answer 18

radial nerve, deep artery of arm

Question 19

what does the suprascapular (C4, 5, 6) nerve innervate?

Answer 19

supraspinatus and infraspinatus

Question 20

what innervate teres minor?

Answer 20

axillary nerve (C5, 6)

Question 21

what are the origin and insertion of the deltoid?

Answer 21

O: clavicle, acromion/spine of scapula
I: deltoid tuberosity on humerus

Question 22

what are the origin and insertion of teres major?

Answer 22

O: inferior angle of the scapula
I: intertubercular groove of the humerus

Question 23

what are the origin and insertion of pec major?

Answer 23

O: clavicle, sternum
I: intertubercular groove of the humerus

Question 24

what innervates the serratus anterior?

Answer 24

long thoracic (C5, 6, 7)

Question 25

at which point does the subclavian artery become the axillary artery?

Answer 25

first rib

Question 26

at which point does the axillary artery become the brachial artery?

Answer 26

lower border of teres major

Question 27

arterial supply of serratus anterior

Answer 27

circumflex scapular artery

Question 28

origin and insertion of pec minor

Answer 28

O: 3rd to 5th ribs, near costal cartilage I: coracoid process

Question 29

pec minor innervation

Answer 29

medial pectoral nerve (C8 and T1)

Question 30

what muscles does the suprascapular artery supply?

Answer 30

supraspinatus and infraspinatus

Question 31

pec major innervation

Answer 31

lateral and medial pectoral nerves (C5, 6, 7, 8, T1)

Question 32

teres major innervation

Answer 32

lower subscapular nerve (C6, 7)

Question 33

deltoid innervation

Answer 33

axillary nerve (C5, 6)

Question 34

how are distal humerus single column condyle fractures classified?

Answer 34

Milch classification

Question 35

what is a milch type 1 fracture?

Answer 35

distal humerus single column condylar fracture with lateral trochlear ridge intact

Question 36

what is a milch type 2 fracture?

Answer 36

distal humerus single column condylar fracture with fracture through the lateral trochlear ridge