Arm & Elbow Joint

• Flexors are nearly _ as strong as extensors?

  2 times
• What compartment contributes to supination of the forearm?

  Anterior
• What bone spins in supination of the forearm?

  Radius
• How many individuals have a 3rd head of biceps brachii?

  10%
• Main flexor of the forearm – flexes in all positions?

  Brachialis
• Coracobrachialis acts on what joint?

  shoulder joint
• Medial and lateral heads relationship to the radial groove?

  Radial groove will separate the origins of the medial and lateral head
• Varus stress would place pressure on what ligament?

  Radial collateral ligament
• What ligament often tears when the elbow joint is dislocated?

  Ulnar collateral ligament
• Terrible Triad of the elbow?

  posterior dislocation + radial head fracture + coronoid process fracture
• Ligament that checks the radius in supination and pronation?

  Annular ligament
• Carrying angle in females is usually how many degrees?

  10-15 degrees, greater than in males
• Carrying angle in males is usually how many degrees?

  5-10 degrees
• Excessive cubitus valgus is how many degrees?

  30 degrees
• Superior and inferior ulnar collateral arteries anastomoses with what artery?

  Ulnar recurrent artery
• When does the axillary artery become the brachial artery?

  at the outer border of the teres major muscle, through triceps hiatus
• What is a good access point for ports or other venous punctures?

  Subclavian vein
• 3 joints that contribute Biceps Brachii contributes to?

  Glenohumeral, elbow and radio-ulnar joints
• Actions of biceps brachii

  Shoulder flexion, elbow flexion and supination
• Muscle that does not contribute to pronation or supination?

  Brachialis
• The muscle that steadies movement during elbow extension (eccentric contraction)?

  Brachialis
• When is biceps brachii most effective as a flexor?

  when forearm is flexed and supinated
• When the forearm is flexed, biceps contributes to what action?

  supination
• What muscle is considered part of the extensor

  compartment of the forearm but does not act on the wrist?

  Brachioradialis
• If musculocutaneous nerve innervation is lost, the brachioradialis can still?

  Weakly flex the forearm
• What muscle of the anterior compartment does not act on the elbow joint?

  Coracobrachialis
• What artery Accompanies the median nerve?

  Brachial artery
• What artery accompanies radial nerve?

  deep brachial artery
• What artery supplies the humerus?

  Humeral nutrient artery
• Triceps hiatus has what nerve and artery that passes through?

  Deep brachial artery

  Radial nerve
• Ligament that can stretch, tear, and fray with repetitive throwing?

  Ulnar collateral ligament
• Pronation causes what bone to go under which bone?

  Radius under ulna
• Supination causes what bone to go under which bone?

  Ulna under radius
• Nursemaid's Elbow causes the radius to sublux and dislocate from what ligament?

  Annular ligament
• Nursemaid's Elbow causes a bump on the anterior forearm, what causes this?

  The muscle pulling the radial head superiorly
• 5 degrees of elbow adduction in the carrying angle is called?

  Cubitus Varus
• 30 degrees of elbow abduction in the carrying angle is called?

  Excessive cubitus valgus
• Superior border of the cubital fossa?

  humeral epicondyle
• Medial border of the cubital fossa?

  Pronator teres
• Lateral border of the cubital fossa?

  Brachioradialis