Upper Limb Anatomy MCQs

Axillary artery branches: 1st part: Superior thoracic. 2nd part: Thoracoacromial, Lateral thoracic. 3rd part: Subscapular, Anterior circumflex humeral, Posterior circumflex humeral.

The musculocutaneous nerve (C5–C7) pierces the coracobrachialis, then runs between the biceps brachii and brachialis muscles.

The axillary nerve winds around the surgical neck of the humerus along with the posterior circumflex humeral artery, making it vulnerable to injury in surgical neck fractures.

The ulnar nerve passes behind the medial epicondyle of the humerus in a superficial groove, where it is easily compressed, producing the characteristic tingling 'funny bone' sensation.

The anatomical snuff box contains the radial artery. Its floor is formed by the scaphoid and trapezium, and its roof by the superficial radial nerve and cephalic vein.

The carpal tunnel contains the median nerve, 4 FDS tendons, 4 FDP tendons, and the flexor pollicis longus tendon. The flexor carpi radialis runs in a separate compartment outside the carpal tunnel.

The ascending branch of the anterior circumflex humeral artery, known as the arcuate artery, provides the chief blood supply to the head of the humerus.

The median nerve is formed by two roots: the lateral root from the lateral cord and the medial root from the medial cord of the brachial plexus.

After the deep branch of the radial nerve passes through the supinator muscle, it continues as the posterior interosseous nerve, supplying the extensor muscles of the forearm.

The ulnar nerve passes through Guyon's canal at the wrist, which is superficial to the flexor retinaculum, accompanied by the ulnar artery.