A key feature of a serious ACL injury is a feeling of instability (i.e. that the knee may collapse from underneath you).

Symptoms with a damaged ACL will be pain, swelling and a feeling of instability. Often times the knee can buckle underneath you and “give way.” If twisting, stopping, turning sports are attempted with a torn ACL, these buckling and “giving way” episodes will recur – a “trick knee.

Any injury that involves the knee being twisted while the foot is planted on the ground can result in a serious ligament injury. Key features of a serious knee injury include a feeling of instability (i.e. a sense that the knee may collapse from underneath you). Recurrent episodes of the knee collapsing with associated swelling and pain are an obvious sign that all is not well, and that medical attention should be sought.

Your ACL can be injured if your knee joint is bent backward, twisted, or bent side to side. The chance of injury is higher if more than one of these movements occurs at the same time. Contact (being hit by another person or object) also can cause an ACL injury. ACL injury often occurs during sports. The injury can happen when your foot is firmly planted on the ground and a sudden force hits your knee while your leg is straight or slightly bent.

Your doctor can tell whether you have an ACL injury by asking questions about your past health and examining your knee. The doctor may ask: How did you injure your knee? Have you had any other knee injuries? Your doctor will check for stability, movement, and tenderness in both the injured and uninjured knee. You may need X-rays, which can show damage to the knee bones. Or you may need other imaging tests, such as an MRI. An MRI can show damage to ligaments, tendons, muscles, or knee cartilage.

Recovery from an ACL injury varies with each individual. Your treatment should continue until your knee is stable and strong, not for a certain length of time. ACL injuries in children and teens are less common than in adults, but they do occur, especially in teens. An untreated or unsuccessfully treated ACL injury in children or teens may result in future knee problems. The knee may become more and more unstable and, over time, osteoarthritis may develop.

The famous "pop" is the most telling symptom of an ACL injury, although you may have a tear without ever experiencing the pop. The injury is usually followed by considerable pain and swelling within the first several hours. You may develop a feeling of instability in the knee or "giving way", making walking difficult.

The ACL (Anterior Cruciate Ligament) is a ligament in the center of your knee. The ACL gets damaged when twisted too far, which makes it a common injury in relation to sports or other physical activity. ACL Reconstruction is performed using a combination of open surgery and arthroscopic surgery. Before ACL reconstruction process begins, your surgeon will examine your knee arthroscopically, and repair any additional damage to the knee, such as a torn meniscus, or worn articular cartilage.

The ACL is the Anterior Cruciate Ligament. There are more than 4 major ligaments that essentially hold the knee together. Without one of more of these ligaments the knee would be loose and you would perceive that the knee was giving way or buckling. The ACL is the most commonly torn knee ligament. The ACL is usually torn as the result of a non-contact twisting injury. You will usually feel or hear a pop, the knee will buckle and within a short period of time, significant swelling will occur.

There are actually two sets of symptoms, one that is observed right after the injury and a second set that occurs some time after the initial phase. The first set of symptoms includes: headache, nausea, dizziness, confusion, agitation, disorientation, amnesia and fatigue. Some of these problems such as headache and fatigue may continue for months after the injury. The second set occurs when the person attempts to return to his or her pre-injury life activities at home, work or school.

In many cases of brain injury, the extent of the injury is difficult to determine by simply observing, especially in mild traumatic brain injuries. Brain injuries may be manifest in physical, cognitive and/or emotional changes in the victim. Physical signs of a brain injury may include diminished capacity in speech, hearing, vision or endurance. Fatigue, frequent headaches, spasms or paralysis may also be signs of a brain injury.

Experts say a person with a mild TBI may remain awake or may experience a loss of consciousness for a few seconds or minutes. Other symptoms of mild TBI include:

anterior cruciate ligament, or ACL, injury is a tear in one of the knee ligaments that joins the upper leg bone with the lower leg bone. The ACL keeps the knee stable. See a picture of the knee and the ACL . Injuries range from mild, such as a small tear, to severe, such as when the ligament and part of the bone separate from the rest of the bone. Without treatment, the injured ACL is less able to control knee movement, and the bones are more likely to rub against each other.

Anterior cruciate ligament (ACL) injuries are caused when the knee is straightened beyond its normal limits (hyperextended), twisted, or bent side to side. Changing direction quickly or cutting around an obstacle or another player with one foot solidly planted on the ground (as can happen in sports that put high demand on the ACL such as basketball, football, soccer, hockey, and gymnastics).

Injuries to the ACL can occur in several ways, usually without contact. High speed twists, bending or extending the knee beyond its normal range, or landing "wrong" from a jump may result in an ACL tear. Basketball, volleyball, tennis and soccer players, as well as skiers and snowboarders are particularly vulnerable. Female athletes are more prone to ACL injury than males.

There are two large ligaments inside your knee each about the size of your little finger that cross deep inside the joint. They are called the ACL (anterior cruciate ligament) and PCL (posterior cruciate ligament) and go from the femur (thigh bone) to the tibia (shin bone). They serve to stabilize the knee and allow it to glide through a smooth range of motion as you bend and straighten the leg. The ACL is the ligament in the front and the one most commonly injured.

It is very hard for a person to consistently fake neurological symptoms or to maintain a consistent pattern of cognitive deficits. There are tests to determine “malingering” and a sound neuropsychological and psychiatric assessment will identify other personality or psychiatric problems that may be present.

No, because immediately after a whiplash accident victims are often unaware that they have been injured. You may be experiencing only slight discomfort and/or stiffness in your neck. Whiplash usually doesn't become apparent for at least 12 to 24 hours after the accident.