Extensor Carpi Radialis Longus - Everything You Need To Know - Dr. Nabil Ebraheim скачать в хорошем качестве

Extensor Carpi Radialis Longus - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describing the extensor carpi radialis longus muscle and intersection syndrome. Origin •The ECRL originates from the lower third of the lateral supracondylar ridge of the humerus. Insertion •Back of the base of the second metacarpal bone. Action •Extension and abduction of the hand at the wrist joint. Means extension and radial deviation of the hand at the wrist joint. In case of posterior interosseous nerve palsy, the extensor carpi radialis longus causes extension and radial deviation of the wrist. In posterior interosseous nerve palsy, the extensor carpi ulnaris function Is lost. The extensor carpi ulnaris is attached to the ulnar aspect of the fifth metacarpal bone and it neutralizes the radial deviation effect of the extensor carpi radialis longus. Innervation •Radial nerve (C6) The tendon of the ECRL is located at the second dorsal extensor compartment and this tendon is implicated in intersection syndrome. Intersection syndrome •Pain felt on the top of the forearm where two muscles that connect to the thumb cross over the underlying wrist tendons. •Pain is located about 4 cm from the wrist joint. •The two tendons of the wrist are the extensor carpi radialis longus and extensor carpi radialis brevis. •Pain is increased by extension and flexion of the wrist (felt more on the top of the forearm). •Intersection syndrome pain is more proximal than the pain associated with De Quervain syndrome. Follow me on twitter: https://twitter.com/#!/DrEbraheim_UTMC