KINE 3200-CHAPTER 6: ELBOW & RADIOULNAR JOINTS Flashcards
elbow and radioulnar joints
Grouped together because of close anatomical relationship
Elbow movements are clearly distinguishable from those of Radioulnar & wrist
radioulnar joint is a
pivot type joint
Which bone is larger proximally?
Ulna
What bone is larger distally?
Radius
what is the origin of the radioulnar joint?
humerus, scapula and ulna
(pronate and supinate)
what is the insertion point of the radioulnar joint?
radius
Movements of radioulnar joint
pronation and supination
what are they key bony landmarks?
Medial condyloid ridge, olecranon process, coronoid process, & radial tuberosity
What type of joint is the elbow joint?
ginglymus (hinge joint)
elbow joint can be thought of as two joints- humeroulnar and humeroradial)
what is the tommy john procedure?
surgery in which tendon graft from palmaris longus tendon is used to reconstruct a ligament
what does the humerus articulate with?
scapula, radius and ulna
what does the radius articulate with?
capitulum
what does the ulna articulate with?
trochlea
What is another name for medial collateral ligament?
ulnar collateral ligament
what is another name for lateral collateral ligament?
radial collateral ligament
Elbow movements
(FLEXION)
movement of the forearm toward the shoulder by bending the elbow to decrease its angle
Elbow movements
(EXTENSION)
movement of the forearm away from the shoulder by straightening the elbow to increase its angle
Radioulnar movements
(SUPINATION)
external rotary movement of the radius on the ulna that results in the hand moving from the palm-down to palm-up position
Radioulnar movements
(PRONATION)
internal rotary movement of the radius on the ulna that results in the hand moving from the palm-up to palm-down position
Elbow and radioulnar joint muscles
(ANTERIOR-PRIMARILY FLEXION AND PRONATION)
BICEPS BRACHII
BRACHIALIS
BRACHIORADIALIS
PRONATOR TERES
PRONATOR QUADRATUS
Elbow and radioulnar joint muscles
(POSTERIOR-PRIMARILY EXTENSION AND SUPINATION)
TRICEPS BRACHII
ANCONEUS
SUPINATOR
what is the nerve for biceps brachii
?
musculocutaneous nerve (C5,C6)
Biceps brachii crosses 3 joints…
1.elbow joint
2.radioulnar joint
3.shoulder joint
-meaning it is multiarticular
What is the origin of the short head of the biceps brachii?
coracoid process