Innervation Motor radial nerve proper triceps anconeus ECRL ECRB brachioradialis PIN ED supinator EDM ECU APL EPL EPB EIP Sensory posterior cutaneous nerve arm posterior cutaneous nerve - forearm superficial branch radial nerve dorsal digital branch Origin Radial nerve originates from the posterior cord of the brachial plexus (C5-T1) behind axillary artery Course Posterior wall axilla courses on the posterior wall of the axilla (on subscapularis, latissimus dorsi, teres major) 3 Branches in axilla posterior cutaneous nerve of the arm branch to long head of triceps branch to medial head of triceps Triangular interval it then runs through the triangular interval with profunda brachii artery in posterior compartment between long head of triceps and humerus Spiral groove next it courses through the spiral groove between lateral and medial heads of triceps bottom line = Safe zone posteriorly of 10 cm distal to the lateral acromion and 10 cm proximal to lateral epicondyle branches in spiral groove inferior lateral cutaneous nerve of the arm posterior cutaneous nerve of the forearm branch to lateral head of triceps branch to medial head of triceps and anconeus Lateral intermuscular septa next it passes through the lateral intermuscular septa never less than 7.5 cm above the distal articular surface. runs between brachialis and brachioradialis (anterior to lateral epicondyle) gives branches to supply: lateral brachialis, brachioradialis, ECRL, ECRB Terminal branches level of radiohumeral joint line, divides into terminal branches superficial sensory branch Deep branch/PIN ECRB branch Injury & Clinical Conditions PIN compression Syndrome Radial Tunnel Syndrome
QUESTIONS 1 of 3 1 2 3 Previous Next (OBQ18.68) A 24-year-old male was involved in a motorcycle crash and sustained the injury shown in Figure A. In the trauma bay it was noted that the patient could not extend his wrist. What artery runs with his injured nerve? QID: 212964 FIGURES: A Type & Select Correct Answer 1 Profunda brachii artery 82% (1590/1936) 2 Posterior circumflex humeral artery 7% (129/1936) 3 Scapular circumflex artery 0% (9/1936) 4 Brachial artery 10% (192/1936) 5 Lateral thoracic artery 0% (6/1936) L 2 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic (OBQ11.147) During recovery for a radial nerve palsy, what is the last muscle to be reinnervated? QID: 3570 Type & Select Correct Answer 1 Brachioradialis 4% (149/3856) 2 Extensor indicis proprius 77% (2977/3856) 3 Extensor carpi radialis brevis 5% (184/3856) 4 Abductor pollicis longus 6% (214/3856) 5 Extensor pollicis longus 8% (307/3856) L 2 Question Complexity B Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK
All Videos (1) Podcasts (2) Login to View Community Videos Login to View Community Videos Radial Nerve anatomy - Origin , Course , Relations , Branches ( Fast Track mode Not for beginners ) Dr Bhanu Prakash Gundepalli Anatomy - Radial nerve D 4/26/2017 1305 views 4.3 (6) Anatomy | Radial Nerve Anatomy - Radial nerve Listen Now 11:46 min 4/1/2021 92 plays 5.0 (1) Anatomy⎪Radial nerve Anatomy - Radial nerve Listen Now 11:21 min 8/13/2020 133 plays 0.0 (0)