If I stand, however, I will be straightening, or extending, my knees.Įxtension increases the angle between body parts. So, I'm still sitting with one knee crossed over the other and somewhere my chiropractor just became flushed with rage and has no idea why. The bursae found in the knee include the superficial prepatellar, superficial and deep infrapatellar, medial and lateral gastrocnemius, suprapatellar, and quite a few more. The synovial fluid in the bursae linings provides lubrication, enabling freedom of movement between contiguous connective tissue surfaces.
Compartments of leg knee skin#
The body employs a bunch of different anatomical structures to keep friction down, and bursae are one of them.īursae are fluid-filled sacs that can be found anywhere skin rubs over bone, and where a muscle, ligament, or tendon glides directly over the periosteum (outer surface) of a bone.
Originates on the intertrochanteric line and medial lip of the linea aspera inserts on the common tendon of the quadriceps enclosing the patella, and on the tibial tuberosity Originates on the upper two-thirds of the anterior and lateral surfaces of the femur inserts on the common tendon of the quadriceps enclosing the patella, and on the tibial tuberosity Originates on the greater trochanter and upper lateral surface of the linea aspera inserts on the patella via the quadriceps tendon, and the tibial tuberosity via the patellar ligament Originates on the anterior inferior iliac spine and a groove superior to the acetabulum inserts on the common tendon of the quadriceps enclosing the patella, and on the tibial tuberosityĮxtension of the leg at the knee joint flexion of the hip Let's take a look at the quadriceps femoris group. In addition to these groups are the plantaris, articulus genu, semiteninosus, semimembranosus, and popliteus. There are two muscle groups that act on the knee joint: the quadriceps femoris and the posterior compartment of the proximal leg. They move when you do-when you walk, run, dance, stretch your legs, or make any action you can think of that involves bending the knees. The muscles of the knee joint are incredibly important. And of course there are-do you know how many anatomical structures it takes to move your knee? Probably more than you think. Where my legs are crossed (at the knees) there are several muscles of the lower limbs in play. My chiropractor would probably throw something at my head if he knew. As I sit here, typing, I've got my legs crossed.
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