In the quadruped stifle joint (analogous to the knee), based on its anatomical position, it is also referred to as the cranial cruciate ligament.

It is composed of strong, fibrous material and assists in controlling excessive motion by limiting mobility of the joint.

The ACL attaches in front of the intercondyloid eminence of the tibia, where it blends with the anterior horn of the medial meniscus.

[6] This function prevents anterior tibial subluxation of the lateral and medial tibiofemoral joints, which is important for the pivot-shift phenomenon.

[7] A key factor in instability after ACL injuries is having altered neuromuscular function secondary to diminished somatosensory information.

[7] For athletes who participate in sports involving cutting, jumping, and rapid deceleration, the knee must be stable in terminal extension, which is the screw-home mechanism.

[8] Most ACL tears are a result of a non-contact mechanism such as a sudden change in a direction causing the knee to rotate inward.

Injured athletes must understand the significance of each step of an ACL injury to avoid complications and ensure a proper recovery.

[citation needed] The main goals to achieve during rehabilitation (rehab) of an ACL tear is to regain sufficient functional stability, maximize full muscle strength, and decrease risk of reinjury.

The neuromuscular training phase is used to focus on the patient regaining full strength in both the lower extremity and the core muscles.

This phase begins when the patient regains full range of motion, no effusion, and adequate lower extremity strength.

[13] Anterior cruciate ligament surgery is a complex operation that requires expertise in the field of orthopedic and sports medicine.

Based on a single leg hop test and self-reported assessment, prehab improved function; these effects were sustained 12 weeks postoperatively.

[16] The rehab can be divided into protection of the graft, improving range of motion, decrease swelling, and regaining muscle control.

In phase three, the patient begins running, and can do aquatic workouts to help with reducing joint stresses and cardiorespiratory endurance.

[17] Patients involved in sports requiring significant cutting, pivoting, twisting, or rapid acceleration or deceleration may not be able to participate in these activities without ACL reconstruction.