The ACL (anterior cruciate ligament)one of the key ligaments that helps stabilize your knee joint. Its located in the center of the knee and controls the back and forth motion of your knee. Heres a bit more detail: 1. Function: The ACL connects the thigh bone (femur )to the shine bone(tibia)and helps to prevent the tibia from sliding out in front of the femur, as well as provides rotational stability to the knee. 2.Injuries : ACL injuries are common, particularly among athletes. They often occur during sports that involve sudden stops, changes in direction, jumping and landing. Common symptoms of an ACL injury include a popping noise, severe pain, swelling, and instability of the knee. Diagnosis: ACL injuries are diagnosed through physical exams and imaging tests like MRI or X-ray. The Lachman test and pivot shift test are common physical tests used to assess the integrity of the ACL. Treatment: Treatment options vary based on the severity of the injury. They can range from physical therapy to surgical reconstruction. Non-surgical treatment often includes physical therapy and bracing, while surgical options involve reconstructing the ligament using a graft. Rehabilitation: Post-treatment rehabilitation is crucial for recovery. It includes exercises to restore knee strength and stability, and a gradual return to activities.