Jersey finger is caused by rupture of:
Flexor digitorum superficialis
Flexor digitorum profundus
Extensor digiti minirni
Extensor indicis proprius
Ans: B. Flexor digitorum profundus(Ref Bailey 26/e p465)Rugger jersey finger:Caused by rupture of flexor digitorum profundus.Injury to flexor profundus tendon at its attachment point to distal phalanx.Occurs mostly in American football when a player grabs another player's jersey with the tips of one or more fingers while that player is pulling or running away."