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ANTERIOR ANTEBRACHIUM

ANTERIOR ANTEBRACHIUM. Muscles. Common function: Wrist and digital flexion. Common origin: Medial epicondyle of humerus. Muscles. Superficial (from superior-inferior and lateral-medial): [Brachioradialis] Pronator teres Flexor carpi radialis Palmaris longus

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ANTERIOR ANTEBRACHIUM

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  1. ANTERIOR ANTEBRACHIUM

  2. Muscles • Common function: Wrist and digital flexion. • Common origin: Medial epicondyle of humerus.

  3. Muscles • Superficial (from superior-inferior and lateral-medial): [Brachioradialis] Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris

  4. Intermediate Muscle Group • Flexor digitorum superficialis: To middle phalanx of digits II through V.

  5. Deep Muscle Group • Ulnar head of pronator teres. • Flexor digitorum profundus. • Flexor pollicis longus. To distal phalanx of thumb. From radius and interosseous membrane. • Pronator quadratus.

  6. Radial Artery • Smallest terminal branch of brachial artery. • Proximally lies deep to brachioradialis. • Distally becomes superficial between brachioradialis and flexor carpi radialis.

  7. Ulnar Artery • Middle third of forearm: Joined by ulnar nerve. Lies under flexor carpi ulnaris. • Distal third of forearm: Superficial and lateral to tendon of flexor carpi ulnaris. Adjacent and lateral to ulnar nerve.

  8. Ulnar Artery Branches • Anterior ulnar recurrent (to inferior ulnar collateral) • Posterior ulnar recurrent (to superior ulnar collateral) • Common interosseous: Anterior interosseous Posterior interosseous

  9. Median Nerve • Supplies all other muscles in the anterior compartment not supplied by the ulnar nerve. • Functional neurological level = C7 • Gives off anterior interosseous nerve.

  10. Median Nerve Route • Crosses anterior cubital fossa medial to brachial artery. • Passes between the two heads of the pronator teres. • Travels between the flexor digitorum superficialis and flexor digitorum profundus.

  11. Ulnar Nerve • To: Flexor carpi ulnaris Half of flexor digitorum profundus

  12. Ulnar Nerve Route • From posterior compartment of brachium • Through sulcus in medial epicondyle • Into antebrachium between two heads of flexor carpi ulnaris • Extends between flexor carpi ulnaris and flexor digitorum profundus.

  13. Relationships • Ulnar artery to ulnar nerve, flexor carpi ulnaris, pisiform, Guyon’s canal. • Median nerve to flexor digitorum superficialis and transverse carpal ligament. • Superficial palmar branch of median nerve to transverse carpal ligament.

  14. Relationships • Radial artery to superficial branch of radial nerve and brachioradialis. • Anterior interosseous nerve and artery to pronator quadratus.

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