Flashcards in Elbow, forearm and wrist Deck (58)
Name the carpal bones.
1st row – scaphoid, lunate, triquetrum, pisiform
2nd row – hamate, capitate, trapezoid, trapezium
What are the two articular surfaces of the distal humerus and what do they articulate with?
Capitulum – articulates with the head of the radius
Trochlea – articulates with the head of the ulna
What is the importance of the epicondyles of the humerus?
They are important sites of attachment of forearm muscles
Which fossae are present on the anterior side of the distal humerus?
Coranoid fossa (the coranoid process of the ulna slots in here when the elbow is flexed)
Which fossa is present on the posterior side of the distal humerus?
Olecranon fossa – the olecranon process of the ulna slots in here when the elbow is extended
Where are tuberosities found near the elbow joint?
What are the two ridges running down the anterior and posterior of the radius?
Anterior oblique line
Posterior oblique line
What does the distal end of the ulna articulate with
An articular disc (not with carpal bones)
What does the distal end of the radius articulate with?
Scaphoid and lunate
What separates the anterior and posterior compartments of the forearm?
Which carpal bone is a sesamoid bone and which muscle tendon is it enclosed in?
It is within the flexor carpi ulnaris tendon
What is the distal attachment of biceps brachii?
What is the distal attachment of brachialis?
Coronoid process of ulna
What is the distal attachment of triceps?
Which compartment are the pronators and supinators in?
Pronators – anterior
Supinators – posterior
Which muscles are in the superficial anterior compartment of the forearm?
Flexor carpi radialis
Flexor digitorum superficialis
Flexor carpi ulnaris
Which muscles are in the deep anterior compartment of the forearm?
Flexor digitorum profundus
Flexor pollicis longus
What is the common flexor origin?
Medial epicondyle of the humerus – this is where most of the anterior compartment muscles (particularly the superficial muscles) originate
Which of the superficial anterior compartment muscles do not cross the wrist?
Describe the attachments of pronator quadratus.
It is attached between the distal ends of ulna and radius
What forms the roof of the carpal tunnel?
Which tendon is continuous with the palmar aponeurosis?
Palmaris longus tendon
NOTE: palmaris longus tendon isn’t present in everyone and before it spreads to form the palmar aponeurosis, it is attached to the flexor retinaculum
Name all the muscles in the extensor compartment of the forearm.
Muscles that move the wrist:
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Muscles that move the fingers:
Extensor digiti minimi
Muscles that move the thumb:
Abductor pollicis longus
Extensor pollicis longus
Extensor pollicis brevis
Where is the common extensor origin?
Lateral epicondyle of the humerus
What can be palpated in the anatomical snuffbox?
Scaphoid (this is often fractured when trying to break a fall)
Which tendons mark the anatomical snuffbox?
Lateral – Extensor Pollicis Brevis + Abductor Pollicis Longus
Medially – Extensor Pollicis Longus
Which blood vessel is present in the anatomical snuffbox?
Branch of the radial artery
What does the head of the radius articulate with?
What are the main ligaments found at the elbow joint?
Radial collateral ligament
Ulnar collateral ligament