Integrated Anatomy - Elbow

Name the proximal attachment for the biceps brachii muscle (short head):

What is the proximal attachment (origin) of most of the muscles of the superficial posterior forearm (i.e. wrist extensors)?

• olecranon process

• lateral epicondyle

• medial epicondyle

• interosseous membrane

What is the distal attachment of the extensor digiti minimi?

• sides of middle phalanges of digits 2 to 5

• dorsal aspect of the base of proximal phalanx of 5^th digit

• palmar aponeurosis

• extensor expansion hood of 5^th digit

The lateral cutaneous nerve of the forearm nerve is a continuation of what nerve?

• musculocutaneous

• axillary

• radial

• median

Name the peripheral nerve that supplies the area of skin pointed by the arrow

• ulnar nerve

• radial nerve

• median nerve

• lateral cutaneous nerve of the forearm

A fracture dislocation at the radial head could cause a nerve injury that would affect which of the following muscle groups?

• Wrist and finger extensors

• Elbow extensors

• Pronators of the forearm

• Elbow flexors

• Wrist and finger flexors

Valgus stress to the elbow tauten / stresses which ligament the most?

• Annular ligament

• Ulnar collateral ligament

• Lateral collateral ligament

• Radial collateral ligament

Why does maximal supination torque require co-activation of the triceps?

• Prevents biceps brachii from pulling the elbow into flexion

• Triceps is a synergist in supination

• Triceps and supinator share the same nerve supply

• To resist excessive valgus force caused by resisted supination

You are asked to assess a patient who fractured the lateral epicondyle where an adjacent nerve has been damaged. Which movement would be affected by this lesion?

• wrist extension

• wrist flexion

• elbow extension

• elbow flexion

Fracture of the lateral supracondylar ridge of the humerus is most likely to injure which nerve?