Session 9 - Elbow And Anterior Forearm Flashcards
What are the 2 articulations of the elbow joint?
Humeroulnar joint
Humeroradial joint
What is the humeroulnar joint?
Humerus and ulna
What is the humeroradial joint?
Humerus
Radius
What is the proximal radio ulnar joint?
Between side of radius and ulna
What is the function of medial epicondyle?
Attachment for flexor-pronator group of muscles in anterior forearm
What is the function of lateral epicondyle?
Attachment for extensor group in posterior forearm
Where does the radial collateral ligament attach to?
Lateral epicondyle of humerus
Annular ligament of radius
What is the function of radial collateral ligament?
Keep radius and capitellum close during pronation and supination
What does ulnar collateral ligament attach to?
Medial epicondyle of humerus and coronoid process
What are the 3 parts of the ulnar collateral ligament?
Anterior
Posterior
Inferior
What is the function of annular ligament?
Stabilize proximal radioulnar joint by forming collar around radial head
What are the movements of elbow joint?
Flexion and extension
What are the 3 major muscles that flex the elbow?
Brachialis
Biceps brachii
Brachioradialis
What is the major extensor of elbow joint?
Triceps brachii
What are the 2 actions of radio ulnar joints?
Supination and pronation
What muscle supinate the forearm when there is no resistance?
Supination
What muscle supinate the forearm when there is resistance?
Biceps brachii
What are the 2 muscles that does pronation?
Pronator quadratus and pronator teres
What are 2 bursae for elbow joint?
Olecranon bursa and subtendinous bursa
Where is the olecranon bursa?
In subcutaneous connective tissue overlying the olecranon
Where is the subtendinous bursa?
Between triceps tendon and tip of olecranon
What is the triangular fibrocartilage complex?
Fibrocartilaginous articular disc that binds radius and ulnar together and separates distal radioulnar joint from wrist joint
What is interosseus membrane?
Fibrous joint between radius and ulnar
What are 2 functions of interosseus membrane?
Keeps bones together during pronation and supination
Prevents proximal displacement of radius of force applied to outstretched hand
How to remember muscles of anterior forearm?
4-1=3
Superficial 4
Intermediate 1
Deep 3
How to remember 4 superficial muscles of anterior forearm?
From medial to lateral, pass fail pass fail
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
What is common flexor origin?
Medial epicondyle of humerus
What are the 2 heads of flexor carpi ulnaris?
Humeral head and ulnar head
What is the action of flexor carpi ulnaris?
Flex and adduct wrist
What is flexor carpi ulnaris innervated by?
Ulnar nerve
What is the palmaris longus action?
Weak wrist flexor
What is palmaris longus innervation?
Median nerve
What are the 2 actions of flexor carpis radialis?
Flexion and abduction at wrist
What is innervation of flexor carpi radialis?
Median nerve
What is the pronator action?
Pronation
What is pronator teres innervated by?
Median nerve
What is the action of flexor digitorum superficialis?
Flex metacarpophalangeal joints and proximal inter phalangeal joints of 4 fingers
What is flexor digitorum superficialis innervation?
Median nerve
