Elbow and forearm anatomy Flashcards
What side is the capitulum of the humerus on?
Radial side
What side is the trochlea of the humerus on?
Ulnar side
Where does the tendon of the biceps insert at the elbow?
On the radial tuberosity
where is the coranoid process found?
On the ulna
Where does the brachialis muscle insert?
Coranoid process and tuberosity of ulna
What is the common origin of the flexor muscles of the forearm?
medial epicondyle
What is the common origin of the extensor muscles of the forearm?
lateral epicondyle
Where is the radial nerve in relation to the lateral epicondyle?
4 finger breadths above it
Where is the posterior interosseous nerve in relation to the lateral epicondyle?
2 finger breadths below it
How many compartments are in the forearm? What are they called, what does each contain and what is their nerve supply?
2
Anterior and posterior
Anterior: contains the flexors, nerve supply is mainly median
Posterior: contains the extensors, nerve supply is radial
What muscles are innervated by the radial nerve
Brachioradialis
Extensor Carpi radialis LOngus
Triceps brachii
What structures attach to the medial epicondyle
Pronator teres, ulnar collateral ligament of elbow joint, and common flexor tendon
Name the insertion, function and nerve supply of the biceps muscle
Insertion: Radial tuberosity and bicipital aponeurosis
function: flexes elbow, supinates forearm
innervation: musculocutaneous nerve
what are the long flexor muscles of the fingeres?
Flexor digitorum profundus
Flexor digitorum superficialis
Name the insertion and function of the long flexor muscles of the fingers
Insertion of FDP: base of the distal phalanges of the fingers
Insertion of FDS: base of the intermediate phalanges
Function:
FDP: flex hand and both interphalangeal joints
FDS: flexion of proximal interphalangeal joints
