elbow anatomy

Question 1

bones of the elbow (3)?

Answer 1

• humerus or the upper arm
• radius
• ulna

Question 2

Three joints at the elbow?

Answer 2

• humeroulnar joint
• humeroradial joint
• roximal radioulna joint

Question 3

humeroulnar joint?

Answer 3

• hinge joint formed between the humerus and ulna

- bend and straighten elbow

Question 4

humeroradial joint?

Answer 4

• between the radius and humerus

- flexion and supination/pronaiton

Question 5

pivot joint formed by the?

Answer 5

radius and ulna

Question 6

Brachialis?

Answer 6

• 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

Question 7

Brachioradialis?

Answer 7

• 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

Question 8

Pronator Teres?

Answer 8

• 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

Question 9

Extensor Carpi Radialis Brevis?

Answer 9

• 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

Question 10

Biceps Brachii?

Answer 10

• 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.

Question 11

Triceps Brachii?

Answer 11

• 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

Question 12

ligaments of the elbow joint (3)?

Answer 12

ulnar collateral
radial collateral
annular

Question 13

Medial Collateral Ligament?

Answer 13

• 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

Question 14

anterior portion of medial collateral ligament?

Answer 14

anterior portion then attaches to the front part of the top of the Ulna, known as the Coranoid process

Question 15

posterior medial collateral ligament?

Answer 15

posterior part to the back of the Ulna, or Olecranon process

Question 16

Lateral Collateral Ligament?

Answer 16

• 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

Question 17

Annular Ligament?

Answer 17

• 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

Question 18

what is the Cubital Tunnel?

Answer 18

• 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

Question 19

lateral epicondylitis s/s?

Answer 19

• painful resisted wrist extension
• painful resisted radial deviation
• palpation tenderness of lateral epicondyle

Question 20

medial epicondylitis s/s?

Answer 20

• painful resisted wrist flexion
• painful resisted forearm pronation
• palpation tenderness of medial epicondyle