elbow jts

Question 1

humeroulnar jt is articulation of the

Answer 1

distal humerus with the promxial ulna

Question 2

humeroradial jt is articulation of the

Answer 2

proximal radiaus with proximal ulna

Question 3

3 major ligaments of elbow

Answer 3

ulnar (medial) collateral ligament
radial (lateral) collateral ligament
annular ligament

Question 4

ulnar (medial) collateral ligament connects

Answer 4

humerus w/ ulna

Question 5

radial (lateral) collateral ligament connects

Answer 5

humerus w/ radius

Question 6

annular ligament connects

Answer 6

radius w/ ulna

Question 7

collateral ligaments provide what?

Answer 7

support for stresses in frontal plane

Question 8

ulnar (medial) collateral ligament provides support for stress that are what kind of forces?

Answer 8

valgus forces

Question 9

radial (lateral) collateral ligament provides support for stress that are what kind of forces?

Answer 9

varus forces

Question 10

lateral =

Answer 10

varus

Question 11

medial =

Answer 11

valgus

Question 12

The annular ligament provides

Answer 12

stability for the radius, securing it to ulna

Question 13

The elbow jt complete is a compound what joint that consists of what 2 articulations?

Answer 13

synovial jt w/ 2 articulations: humeroulnar and humeroradial

Question 14

The elbow joint is what w/ proximal RU jt?

Answer 14

continuous

Question 15

The proximal RU jt being continuous w. elbow jt allows

Answer 15

radial head to rotate during pronation and supination of forearm

Question 16

What does distal humerus articulate w/ ? What are they enclosed by?

Answer 16

distal humerus articulates with both proximal ulna and radius, which are enclosed by one capsule and share single synovial cavity

Question 17

Laterally, the capitulum of humerus articulates w/ head of radius to form what jt ?

Answer 17

humeroradial jt

Question 18

Medially, the trochlea of humerus articulates w/ trochlear notch of ulna to form what jt ?

Answer 18

humeroulnar jt

Question 19

what joint has a jt capsule that is continuous w/ that of humeroulnar and humeroradial jts, and is articulation of radial head w/ radial notch of ulna

Answer 19

PROXIMAL radioulnar jt

Question 20

What kind of jts are the humeroulnar and humeroradial jt ? What kind of muscle action does this yield?

Answer 20

hinge jts that flex and extend elbow in sagg plane

Question 21

During saggital motion of elbow, what happens?

Answer 21

trochlear notch of humerus slides into the trochlear groove of the ulna

Question 22

Upon elbow full flexion, what occurs ?

Answer 22

the coronoid process of ulna approximates the coronoid fossa of humerus

Question 23

At full ext, what what happens?

Answer 23

the olecranon process of ulna hit the olecranon fossa, thereby enhancing stability of elbow in full ext

Question 24

what kind of jt is proxoimal RU jt?

Answer 24

pivot jt

Question 25

proximal RU jt permits what>

Answer 25

axial rot of radial head during supination and pronation of forearm

Question 26

elbow ROM supination and pronation

Answer 26

80-90 degreee

Question 27

Anterior muscles of elbow muscle action

Answer 27

flex elbow

Question 28

what are the ant muscles of elbow?

Answer 28

biceps, brachilais, and brachioradialis

Question 29

long head of biceps origin

Answer 29

supraglenoid tubercle of scapula

Question 30

short head of biceps origin

Answer 30

coracoid process of scapula

Question 31

long and short heads of biceps insertion

Answer 31

tuberosity of radius

Question 32

biceps is a strong what and does what muscle action of elbow?

Answer 32

strong supinator and flexes elbow most effectively when forearm supinated

Question 33

long head biceps assists in what muscle action of shoulder?

Answer 33

shoulder flexion

Question 34

How do you effectively train biceps>

Answer 34

elbow flexion and forearm supination

Question 35

WHAT MUSCLE IS elbow flexor workhorse?

Answer 35

brachialis

Question 36

What pronates forearm?

Answer 36

``` pronator quadratus (stronger) pronator teres ```

Question 37

posterior muscles of elbow do what muscle action

Answer 37

extension of arm

Question 38

posterior muscles

Answer 38

ticeps and aconeus

Question 39

describe triceps

Answer 39

3 head, 2 jt muscles that acts on shoulder and elbow

Question 40

long head of triceps origin

Answer 40

infraglenoid tubercle of scapula

Question 41

medial and lat heads of triceps origin

Answer 41

upper humerus

Question 42

All 3 heads of triceps insertion

Answer 42

olecranon of ulna

Question 43

triceps is what muscle action

Answer 43

main elbow extensor

Question 44

aconeus provides

Answer 44

minor assistance to triceps in elbow flexion

Question 45

aconeus

Answer 45

a small muscle that adds stability to posterior elbow jt