0:00:00.000,0:00:03.179 (English captions by Jade Cheng from the University of Michigan) 0:00:03.179,0:00:06.160 Evaluate the injured finger for flexion. 0:00:06.160,0:00:10.940 Inability to flex the isolated finger at the[br]metacarpophalangeal joint may indicate a partial 0:00:10.940,0:00:13.900 or complete tear of the flexor digitorum superficialis.