Diagram of forearm

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Here are the forearm anatomy diagrams from the medical textbook library:

Forearm Anatomy

Fig. 1 - Overview & Cross-Section (Gray's Anatomy for Students)

Forearm overview and cross-section showing proximal/distal relationships, radius, ulna, cubital fossa, carpal tunnel, and compartment anatomy

(A) Shows proximal and distal relationships: the biceps tendon, brachial artery, and median nerve enter via the cubital fossa at the elbow; distally, the median nerve and long flexor tendons of the digits pass through the carpal tunnel at the wrist. The radius (lateral) and ulna (medial) form the bony framework.

(B) Transverse cross-section through the mid-forearm showing the radius and ulna separated by the interosseous membrane, with the anterior (flexor) and posterior (extensor) compartments divided by the lateral intermuscular septum and deep fascia.

Fig. 2 - Right Radius (Gray's Anatomy for Students)

Radius bone - anterior, posterior and distal views with labeled surfaces, borders, and attachment points

Key landmarks: radial tuberosity (proximal, for biceps insertion), oblique line, pronator teres attachment site on the shaft, radial styloid process and articular facets distally for scaphoid and lunate bones.

Fig. 3 - Right Ulna (Gray's Anatomy for Students)

Ulna bone - anterior view with olecranon, coronoid process, trochlear notch, and ulnar styloid process labeled

Key landmarks: olecranon and trochlear notch proximally (for elbow articulation), radial notch (proximal radioulnar joint), pronator quadratus attachment distally, ulnar styloid process.

Fig. 4 - Posterior (Extensor) Compartment Muscles (THIEME Atlas of Anatomy)

Posterior forearm extensor muscles - extensor digitorum, extensor carpi ulnaris, extensor digiti minimi, with origins from lateral epicondyle and insertions into fingers

Shows the superficial extensor group arising from the common extensor origin at the lateral epicondyle, fanning out into tendons with dorsal digital expansions.

Fig. 5 - Posterior Forearm Arteries (THIEME Atlas of Anatomy)

Deep dissection of posterior forearm arteries - posterior interosseous artery, anterior interosseous artery, radial artery, with extensor muscles labeled

Shows the posterior interosseous artery entering the extensor compartment by piercing the interosseous membrane just below the supinator, and the anterior interosseous artery piercing distally to supply the dorsal wrist.

Key anatomical summary:

Structure	Anterior (Flexor) Compartment	Posterior (Extensor) Compartment
Nerve supply	Median nerve (mainly), ulnar nerve	Radial nerve (posterior interosseous branch)
Function	Wrist/digit flexion, pronation	Wrist/digit extension, supination
Main artery	Anterior interosseous artery	Posterior interosseous artery
Bones	Radius (lateral), Ulna (medial), linked by interosseous membrane	Same

Sources: Gray's Anatomy for Students, Fig. 7.79-7.81; THIEME Atlas of General Anatomy and Musculoskeletal System, pp. 339, 417

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