A member asked:

Whats the difference between a acl and a pcl? i fell onto a driveway and slammed my knee into the ground. can't seem to walk up or downstairs now.

A doctor has provided 1 answer
Dr. Stephen Southard answered

Specializes in Internal Medicine

Opposites: The anterior cruciate ligament(ACL) and posterior cruciate ligament(PCL) serve opposite purposes. The ACL helps prevent the shin bone(tibia) from moving too much forward compared to your thigh. The PCL helps prevent the shin bone from moving too far backwards compared to your thigh. It's difficult to decipher the injury to your knee without being examined in person; seek in-person help.

Answered 7/27/2014

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