<prompt> Extensor Carpi radialis Longus isExtensor and ulnar detor of the wristExtensor and radial Detor of the wristInjured in Posterior interosseus nerve injuryWeak extensor of the wrist  <response>: Extensor carpi radialis Longus is a primary extensor and radial detor of the wristIt is supplied by the radial nerve and not the PINLoss of function cause wrist dropRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 235, 266 