what is a sprain mcl
Medial Knee Ligament Injury. A medial ligament sprain or MCL injury is a tear of the ligament on the inside of the knee, usually a result of twisting or direct impact.Medial ligament injuries are common in contact sports such as football and rugby, as well as martial arts.natomy. The medial collateral ligament or MCL for short connects the thigh bone (or femur) to the shin bone (or tibia) on the inside of the knee and prevents the knee joint from moving sideways, particularly from forces on the outside of the knee.