Watch This Video of Why Knee Pain Can't Wait
The knee is a hinge joint that sits between the thigh and the shin. It functions the same as a hinge on a door and sometimes gets a creaky as a hinge can. This joint allows the legs to bend and straighten, necessary for walking, going up and downstairs, going from sitting to standing, running, and jumping. The knee's anatomy consists of many structures from the bones, tendons, and ligaments to the cartilage and muscles to help the knee function.
The anatomy of the knee consists of 3 main bones:
The femur and the tibia are the main movers of the joint to allow for the hinge motion. This connection of the femur and tibia is a joint called the tibiofemoral joint. The patella sits on top of the tibiofemoral joint in a groove in the front of the femur. The patella is a floating bone that works as a fulcrum for the quadriceps muscle (you will read about this later) to function properly. This joint is called the patellofemoral joint and allows the patella to move up and down, and the knee bends and straightens.
The knee has 4 main ligaments:
The MCL and the LCL sit on the sides of the knee, and they help give stability to the knee if your knee gets hit from the sides.
The ACL and PCL are inside the knee and cross each other as they run front to back and vise versa. These 2 ligaments are responsible for giving the knee stability from front to back.
An ACL injury is probably one of the most recognized injuries in sports and, most of the time, requires a surgical repair that has a long recovery time. A full recovery after an ACL reconstruction is usually between 6 to 9 months depending on the patient and the other structures injured.
The unhappy triad is referred to when the ACL, MCL and Medial Meniscus are all injured at the same time. .
Tendons are where muscles attach to the bones of the knee. There are numerous tendons in the knee. The tendons which are prone to injuries of the knee are the Patellar Tendon and the Quadriceps Tendon. These patellar tendons can rupture or tear and they can also get tendonitis.
There are two main types of cartilage in knee anatomy: articular cartilage and the meniscus.
The quick answer is that a torn knee ligament can cause:
To learn more, check out this article on Knee Ligaments.
Many muscles affect the knee, but the main muscles that allow for the knee to perform its main functions are:
All of these muscles also have functions at different joints such as the hip and the ankle. Injuries to these structures, such as a pull or strain, will cause pain when activating the muscle and, if severe enough, will cause significant weakness.
Many types of knee injuries can occur. Muscles, tendons, ligaments, and cartilage can be strained and sprained. It is really important to have your knee pain properly diagnosed by an orthopedic physician. JOI Rehab also has 12 Physical Therapy locations, which can certainly help you on the road to recovery. With over 90 Rehab Clinicians trained in providing you with the highest quality of orthopedic care. For an appointment, please call 904-858-7045.
To schedule an appointment for physical therapy at one of the 12 JOI Rehab Centers, please call 904-858-7045.
JOI MD's now offer quick fracture care. Make an appointment by calling (904)JOI-2000, schedule online, or click the link below...