They can occur when you perform an activity where you forcefully twist or rotate your knee, especially when you have your full weight on it. Uttaranchal College of Education Causes of Joint Locking There are a few reasons as to why a joint may lock. LOCKING OF KNEE JOINT  The anteroposterior diameter of the lateral femoral condyle is less than that of the medial condyle. If the locking is intermittent or due to pain, non-surgical treatments can oftentimes be tried first. Later, you’ll need to perform therapeutic exercises to boost your knee strength and stability. Answered August 10, 2016 The knee is able to lock via a muscle called the popliteus. Standing hamstring curls. There are two types of knee locking: a true knee lock and a pseudo knee lock. A flexion force will automatically result in lateral rotation of femur. Placing ice on the knee will help to reduce pain and the effects of swelling. are possible. However, some causes of a locked knee may require more intense treatments, such as surgery. To treat a meniscus tear, your doctor will likely recommend rest, ice, and anti-inflammatory medication. The main symptom of pseudo knee locking is pain, accompanied by an inability to move the knee. You might feel that your knee or knees have locked into place. 35. Inflammation of Knee Joint – Knee joint inflammation causes swelling of knee joint. Non-Surgical Treatment of a Locked Knee. Popliteus is the primary muscle to unlock the knee. Complaints of locking sensation in the knee joint can be divided into true locking and pseudo locking. 1. There are several possible causes of a locked knee, and each has its own treatment regimen. Get the ice pack or wet icy towel to compress the knee joint. To initiate flexion, knee must be unlocked. Department of Physiotherapy By – Assistant Professor – Dr. Rinku Yadav Learn how to recognize and treat this knee condition with exercise or…, The medial patellar ligament is a connective tissue that consists of transverse fibers (fibers that run horizontally). It occurs at end of knee extension, between full extension (0 degrees) and 20 degrees of knee flexion. This is your body causing a muscle spasm triggered by pain in or near your knee. A meniscus tear is the most common cause of a true knee lock. Symptoms of knee locking "Knee locking" is quite literally when your knee locks up momentarily, inhibiting your ability to move in any direction. Having a knee that's unable to be bent, also called a locked knee, is typically a sign of a significant problem with the knee joint. College Of Nursing UCBMSH, Your email address will not be published. Actually, it’s a compound joint being composed of 3 articulations: left and right condylar joints between the condyles of the femur and tibia, and 1 saddle joint between the femur and patella. In some cases, additional surgery is needed to repair the kneecap if the loose body has caused damage. This C-shaped, rubbery, cartilage plays a key role in…. do i still need to have my torn meniscus repaired? Our website services, content, and products are for informational purposes only. Open kinematic chain: lateral rotation of tibia on femur. One type of injury is a locked facet joint. Meniscus tears are one of the most common types of knee injuries. It’s a kind of dislocation in which a lower vertebra’s facet joint slips “over” the one above it; it can happen on one or both sides of a vertebra. Other symptoms include: This is a condition that causes your kneecap to move incorrectly. Closed kinematic chain extension from 30 degree flexion- The consequences of automatic rotation is also known as “locking mechanism” or “screw home mechanism.” A ligament is a type of…, The lateral meniscus is attached to the shin and is located on the outer side of the knee. ‘True locking’ refers to an intra-articular mechanical block preventing knee extension, whereas ‘pseudo-locking’ is a mechanical block with an unidentified source, but often results from hamstring muscle spasm . "my knee was catching and locking often for a few weeks but is now better. Locking and unlocking of the knee: arthrographic demonstration. AJR Am J Roentgenol. Unfortunately, there is no "key" or secret trick to unlock your knee joint, … After your surgery, you will need a period of rest for your knee to heal. Gray's Anatomy 41st edition . Required fields are marked *. They are also likely to recommend physical therapy to strengthen the muscles around your knee and in your legs, which will help stabilize your knee joint and reduce pain and locking. Loose Tissue Fragments Can Cause Knee Locking or Locked Knee-Severe pain is caused by loose tissue fragments other than cartilage when lodged inside the joint. College Of Bio-Medical Sciences & Hospital |UCBMSH.ORG. There are 8 conditions associated with joint locking or catching, muscle cramps or spasms (painful) (buttock), muscle cramps or spasms (painful) (foot (top)) and muscle cramps or spasms (painful) (toes). The knee can be unlocked by rotating the leg and full movement can be restored. Uttaranchal (P.G.) Other symptoms include: Some causes for pseudo knee locking include: This is often caused by trauma to the knee or degenerative disease. The knees are some of the body’s most hardworking joints, bearing much of the body’s weight. Treatment of a loose body is fairly straightforward: surgery is needed to remove it. It could be plica syndrome. A brief discussion on the locking and unlocking mechanism of the knee joint is covered in this video. Other conditions are often best treated with a good physical therapy regimen. Share on Pinterest. Med. It is constructed by 4 bones and an extensive network of ligaments and muscles. All rights reserved. Healthline Media does not provide medical advice, diagnosis, or treatment. Besides knee locking, symptoms include: This occurs when a piece of your knee bone breaks off due to: The bone fragment will float around your knee joint. Your knee can lock when the torn part of this cartilage gets in the way of your knee moving correctly. This condition is aptly called a “locked knee.”. Sreeraj S R 36. A flexion force will automatically result in lateral rotation of femur. https://orthop.washington.edu/patient-care/articles/sports/torn-meniscus.html Popliteus muscle (Musculus popliteus) The popliteus muscle is a small muscle that forms the floor of the popliteal fossa.It belongs to the deep posterior leg muscles, along with tibialis posterior, flexor digitorum longus and flexor hallucis longus..  All the ligaments of the knee joint are taut. A true knee lock occurs when something in your knee joint gets stuck into one position and you cannot move it at all. So if this important muscle that keeps the lateral meniscus out of harms way wasn’t working properly, your lateral meniscus would be crushed (and your knee would feel like it was locking). Your knee can lock if this loose body gets caught and stops your knee from moving normally. True locking happens when the intra-articular structure (e.g. Sometimes this can be very painful. 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