Date : 10/01/2022
Forearm Anatomy Quiz Question 1Which of these muscles are the deepest in the forearm? A) Flexor digitorum profundusB) Flexor digitorum superficialis C) Flexor carpi ulnarisD) Palmaris longusE) Flexor carpi radialis Flexor digitorum profundus arises from the ulna and interosseus membrane. Both flexor digitorum profundus and flexor pollicis longus are the deepest muscles in the forearm. Question 2Which of these muscles are the most superficial in the forearm? A) Flexor digitorum superficialis B) Palmaris longusC) Pronator quadratusD) Flexor carpi radialisE) Flexor digitorum profundus Palmaris longus inserts into the palmar fascia and is absent in a proportion of the population. It s function is minimal and the muscle and tendon can be used as tendon grafts. Question 3Which of these forearm muscles is supplied by the ulnar nerve? A) Flexor carpi radialisB) Flexor digitorum superficialisC) Pronator teresD) Flexor carpi ulnarisE) Anconeus The ulnar nerve is the nerve of the hand. The exception to this rule is the flexor carpi ulnaris and the ulnar half of the flexor digitorum profundus muscle. Question 4Which nerve supplies the pronator teres muscle? A) Median nerveB) Radial nerveC) Ulnar nerveD) Musculocutaneous nerveE) Axillary nerve The median nerve is the nerve of the forearm. The exception to this tule are the muscles of the thenar eminence (flexor pollicis brevis, extensor pollicis brevis, opponens pollicis) and radial two lumbrical muscles. Question 5Which artery divides to form the radial and ulnar artery? A) Subclavian arteryB) Axillary arteryC) Brachial arteryD) Branchial arteryE) Deep palmar arch The axillary artery becomes the brachial artery once is passes the inferior border of teres major. Question 6Which bone of the forearm articulates with the scaphoid bone? A) UlnaB) HumerusC) TrapesiumD) RadiusE) Clavicle The radius articulates with the scaphoid and the lunate carpal bones. Proximally the head of the radius sits within the annular ligament and attaches to the lateral aspect of the ulna. The head of the radius articulates with the capitulum of the humerus. Question 7Which bone of the forearm articulates with the triangular fibrocartilaginous complex (TFCC) of the wrist? A) UlnaB) HumerusC) TrapesiumD) RadiusE) Clavicle The ulna bone articulates with the triangular fibrocartilaginous complex, and has no direct bony articulation distally. The TFCC is a triangular pad of cartilage that sits between the ulna and the triquetrum carpal bone. Question 8What vein of the forearm drains into the axillary vein without receiving drainage from any other veins? A) CephalicB) BrachialC) BasilicD) RadialE) Ulnar The superficial veins of the forearm are the cephalic and basilic. The cephalic is named after the word cephalad i.e. relating to the head. This is because the vein passes from the hand, up the forearm and joins the brachial vein without receiving any tributaries. At this point it is renamed the axillary vein. Question 9Which nerve passes through the cubital tunnel? A) Radial nerveB) Median nerveC) Ulnar nerveD) Axillary nerveE) Musculocutaneous nerve The cubital tunnel is a fascial tunnel on the medial aspect of the elbow joint. It conveys the ulnar nerve from the arm into the forearm. At this point the nerve can become impinged and result in paraesthesia and pain for the patient. Question 10Which muscle of the forearm wraps around Lister s tubercle of the radius? A) Flexor pollicis longusB) Flexor carpi radialisC) Extensor carpi radialis longusD) Extensor digiti minimiE) Extensor pollicis longus Listers tubercle is a projection from the dorsal aspect of the radius. The EPL tendon wraps around this tubercle, which enables the tendon to extend the thumb in the correct anatomical plane.
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