<prompt> The following muscles are supplied by radial nerve below the spiral groove except:BrachialisBrachioradialisExtensor carpi radialis longusAnconeus  <response>: Ans: D Anconeus Ref: Grays Anatomy:Anatomical basis of clinical practice by Susan Standring, Churchill Livingstone, 40th edition, 2008, Pg. 829,837Explanation:Radial Nerve C5678T1Above elbowBelow elbow Above spiral groove :- Triceps long, medial head- Posterior cutaneous nerve of arm In spiral groove : Sensory- Posterior cutaneous nerve of forearm- Lateral cutaneous nerve of arm Anconeus- Triceps medial and lateral heads Between spiral groove and lateral epicondyle- Brachialis- Brachioradnalis- Extensor carpi radialis longus Posterior interosseous nerve supply remaining Ms. i.e.- Abductor pollicis longus- Extensor pollicis longus and brevis- Extensor indicis Supinator- Extensor digitorum- Extensor digit, minimi- Extensor carpi ulnaris- Extensor carpi radialis brevis 