Chapter 6, The Raidioulnar Joint And Elbow

Front 1

most upper extremity movements involve the ____&____ joints

Back 1

elbow and radioulnar joints

Front 2

elbow joint movements may be clearly distinguished from those of the ______

Back 2

radioulnar joint

Front 3

radioulnar joints movements may be distinguished from those of the _____

Back 3

wrist

Front 4

the ___ is much ____ ______ than the radius

Back 4

ulna, larger, proximally

Front 5

the ___ is much ___ ___ than the ulna

Back 5

radius, larger, distally

Front 6

____ and ____ serve as ____ attachments for muscles that flex and extend the elbow.

Back 6

scapula, and humerus, proximal

Front 7

the ___ and ____ serve as ___ attachments for these same muscles

Back 7

ulna, radius, distal

Front 8

what 3 bones serve as proximal attachments for muscles that pronatate and supinate the Radioulnar joints

Back 8

scapula, humerus, ulna

Front 9

distal attachments of radioulnar joint muscles are located on the ____

Back 9

radius

Front 10

name the 2 interrelated joints:

Back 10

humeroulnar and radiohumeral

Front 11

what type of joint is the humeroulnar?

Back 11

hinge type joint

Front 12

what type of actions does the humeroulnar joint allow?

Back 12

only flexion and extension

Front 13

what type of joint is the radiohumeral?

Back 13

hinge type joint, and wheel and axel

Front 14

what actions does the radiohumeral joint allow?

Back 14

flexion, extension, supination, and pronation

Front 15

humeral trochlea fits into what?

Back 15

ulnar trochlear notch

Front 16

radial head has small amount of contact with the capitulum on the humerus. T/F?

Back 16

true

Front 17

once an elbow is in full extension, it has increased joint stability. T/F?

Back 17

true

Front 18

stability in flexion is more dependent on these two ligaments?

Back 18

MCL, and LCL

Front 19

LCL is known as the?

Back 19

radial collateral ligament

Front 20

MCL is known as the?

Back 20

Ulnar collateral ligament

Front 21

the radioulnar joint is what type of joint?

Back 21

pivot type joint

Front 22

how does the radial head rotate ?

Back 22

around at proximal ulna

Front 23

distal radius rotates around?

Back 23

the distal ulna

Front 24

what does the annular ligament do?

Back 24

maintains radial head in it joint

Front 25

radioulnar joint supinates ___ to ___ degrees from neutral

Back 25

80-90

Front 26

radioulnar joint pronates ___to ___ degrees from neutral

Back 26

70-90

Front 27

radioulnar joint is what type of joint?

Back 27

syndesmosis-substantial rotary motion btwn the bones

Front 28

while tightening a screw driver, we _____ the radioulnarjoint

Back 28

supinate

Front 29

when loosening a screw, the wrist will _____

Back 29

pronate

Front 30

what is pronation?

Back 30

the hand moving from palm up to palm down position

Front 31

what is supination?

Back 31

movement of the hand from the palm down to the palm up position

Front 32

what are the elbow flexors?

Back 32

biceps brachii, brachialis, bracioradialis, weak assistance from the pronator teres

Front 33

elbow extensors?

Back 33

triceps brachii, and the anconeus provides assistance

Front 34

name the radioulnar pronators located anteriorly

Back 34

pronator teres, pronator quadratus, brachioradialis

Front 35

name the radioulnar supinators located posteriorly

Back 35

biceps brachii, supinator muscle, brachioradialis

Front 36

what is tennis elbow?

Back 36

a injury problem involving the extensor digitorum muscle near its origin on lateral epicondle, known as epicondylitis

Front 37

what is medial epicondylitis?

Back 37

it is known as golfers elbowand it is associated with middle wrist flexor and pronator group, less common

Front 38

primary flexion and pronation anterior muscles?

Back 38

biceps brachii, brachialis, brachioradialis, pronator teres, pronator quadratus

Front 39

primary extension and supination posterior muscles?

Back 39

triceps brachii, anconeus, supinator

Front 40

what are the actions performed by the biceps brachii?

Back 40

flexion of the elbow, supination of the forearm, weak flexion of the shoulder joint, weak abduction of shoulder joint when externally rotated

Front 41

what are the actions of the brachialis muscle?

Back 41

true flexion of elbow

Front 42

what are the actions of the brachioradialis muscle?

Back 42

elbow flexion, pronation from supinated position to neutral, supination from pronated position to neutral

Front 43

the brachioradialis muscle is strongest in what position?

Back 43

neutral

Front 44

all heads of the triceps does what?

Back 44

extension of the elbow

Front 45

the triceps brachii is a ____

Back 45

prime mover

Front 46

the anconeus is a

Back 46

assister

Front 47

the anconeus does what action?

Back 47

elbow extension

Front 48

the pronator teres muscle does what?

Back 48

pronation of the forearm and weak elbow flexion

Front 49

the pronator teres is an?

Back 49

assister

Front 50

pronator quadratus muscle does what action?

Back 50

pronation of the forearm

Front 51

the supinator muscle does what?

Back 51

only supinates the forearm

Front 52

what are the agonists for elbow flexion?

Back 52

biceps brachii, brachialis, brachioradialis

Front 53

what asre the agonists for elbow extension?

Back 53

triceps brachii and anconeus is an assister

Front 54

radioulnar pronation agonists are?

Back 54

pronator teres, pronator quadratus, brachioradialis (full supination to neutral)

Front 55

radioulnar supination agonists are?

Back 55

example is tightening a screw with your right hand...agonists are biceps brachii, supinator muscle, and brachioradialis