If patients present themselves with similar symptoms, physicians should also consider De Quervain syndrome, rheumatoid arthritis or flexor carpi radialis and flexor pollicis longus tendinopathy as a possible cause.
12.
So for example, the " flexor pollicis longus " and " flexor pollicis brevis " oppose the " extensor pollicis longus " and the " extensor pollicis brevis " in the movement of the thumb.
13.
As might be expected, the symptoms involve weakness in the muscle innervated by the AIN including the flexor digitorum profundus muscle to the index ( and sometimes the middle ) finger, the flexor pollicis longus muscle to the thumb and the pronator quadratus of the distal forearm.
14.
In IC 1 it is used to restore wrist extension, while in IC 2 8 it is used to restore finger extension ( m . extensor digitorum communis ) and finger ( m . flexor digitorum profundus ) or thumb flexion ( m . flexor pollicis longus ).
15.
It accompanies the anterior interosseous artery along the anterior of the interosseous membrane of the forearm, in the interval between the flexor pollicis longus and flexor digitorum profundus, supplying the whole of the former and ( most commonly ) the radial half of the latter, and ending below in the pronator quadratus and wrist joint.
