Dr. Ebraheim’s educational animated video describes difference between the quadriceps avoidance gait and the active quadriceps test and the different indications and prognosis.
What is quadriceps avoidance gait? It is an ACL injury. Most people with an ACL tear will alter their gait to avoid anterior displacement of the tibia which occurs when the quadriceps contracts. The patient will walk with a slightly bent knee to avoid making the quadriceps work. This decreases the demand for the function of the quadriceps which minimizes the anterior pull on the tibia by helping the knee to be more stable. Quadriceps avoidance gait occurs by hip flexion, knee flexion or both hip and knee flexion. The patient leans forward so the quadriceps do not have to work (the hip is flexed) and the knee is bent.
What is active quadriceps test? It a PCL injury. The examiner stabilizes the leg of the patient while the patient is asked to actively contract the quadriceps.
Pivot Shift test: a palpable clunk is very specific of an ACL tear. The iliotibial band will reduce the tibia and create the clunk on the outside of the knee.
The hamstrings muscle are used in therapy for an ACL tear since the hamstrings pull the tibia backwards.
After surgery to the ACL, open chain quadriceps exercises such as seated leg extension should be avoided. After surgery to the ACL, open chain quadriceps exercises such as seated leg extension should be avoided.
Mechanism of Injury: Dashboard injury is a common cause of injury to the PCL is due to a bent knee hitting a dashboard during a car accident. Direct blow to the proximal tibia with the knee flexed.
PCL injury: the quadriceps muscle is strengthened during rehabilitation of a PCL injury. The hamstring will create a posterior pull on the tibia and cause increased stress on the posterior cruciate ligament reconstruction.
Become a friend on facebook:
[ Ссылка ]
Follow me on twitter:
[ Ссылка ]
Donate to the University of Toledo Foundation Department of Orthopaedic Surgery Endowed Chair Fund:
[ Ссылка ]
