elbow anatomy Flashcards
bones of the elbow (3)?
- humerus or the upper arm
- radius
- ulna
Three joints at the elbow?
- humeroulnar joint
- humeroradial joint
- roximal radioulna joint
humeroulnar joint?
- hinge joint formed between the humerus and ulna
- bend and straighten elbow
humeroradial joint?
- between the radius and humerus
- flexion and supination/pronaiton
pivot joint formed by the?
radius and ulna
Brachialis?
- strongest elbow flexor when the palm is pronated
- arises from the lower half of the front of the Humerus and inserts on the Coronoid process (front bony protusion) of the Ulna
Brachioradialis?
- starts at the outer edge of the lower third of the Humerus, crosses the joint and inserts at the lower end of the Radius
- flex the elbow and aid pronation and supination
Pronator Teres?
- golfers elbow (Medial Epicondylitis)
- flexion of the elbow and pronate the forearm
- originates just above the medial epicondyle and inserts on the outer surface of the Radius
Extensor Carpi Radialis Brevis?
- tennis elbow (Lateral Epicondylitis)
- extend the wrist and aid extension of the elbow
- arises from the lateral epicondyle of the Humerus and inserts on the third Metacarpal of the hand
Biceps Brachii?
- muscle arises from the Coracoid process and Supragleniod tubercle (both parts of the shoulder blade) and travels down the arm, crosses the elbow joint and inserts on the Radius
- flex the elbow joint and supinate the forearm.
Triceps Brachii?
- Originates from the Scapula and back surface of the Humerus to cross the elbow and attach to the - Olecranon process (posterior Ulna)
- main extensor of the elbow
ligaments of the elbow joint (3)?
ulnar collateral
radial collateral
annular
Medial Collateral Ligament?
- Ulnar Collateral Ligament
- two triangular bands, anterior and posterior
- Both sections arise from the Medial Epicondyle and pass over the inside of the elbow joint
- anterior and posterior
anterior portion of medial collateral ligament?
anterior portion then attaches to the front part of the top of the Ulna, known as the Coranoid process
posterior medial collateral ligament?
posterior part to the back of the Ulna, or Olecranon process
Lateral Collateral Ligament?
- Radial Collateral Ligament
- which strengthens the side of the wall of the joint capsule of the elbow,
- fibrous band extending between the lateral epicondyle of the humerus (upper arm bone) and the annular ligament of the radius
Annular Ligament?
- attached to the margin of the trochlear notch of the ulna
- encircles the head of the radius, functioning to keep the head in contact with the radial notch of the ulna
what is the Cubital Tunnel?
- channel which allows theUlnar nerveto travel over theelbow
- bordered by themedial epicondyle of the humerus, theolecranonprocess of the ulna and the tendinous arch joining the humeral and ulnar heads of theflexor carpi ulnaris
lateral epicondylitis s/s?
- painful resisted wrist extension
- painful resisted radial deviation
- palpation tenderness of lateral epicondyle
medial epicondylitis s/s?
- painful resisted wrist flexion
- painful resisted forearm pronation
- palpation tenderness of medial epicondyle
