Unlock Your Hip Flexors
The lower limbs are made up of two essential parts the thigh, where the quadriceps and the sartorius muscle lies, and the leg itself, which consists of the bulk of the tibiae and the calves. The knee lies between these two parts. The knee is the joint that articulates both of these parts, and it should look rounded and prominent when it is drawn. Notice that if you measure the length of the leg from the hamstring to the ankle, the knee is not located in the middle of the leg, but a bit further down, so when you draw the thigh you should make it longer than the calf. The calf muscles are prominent in the lower part of the leg. They begin just behind the knee and end at the Achilles heel.
The rectus femoris muscle makes a slightly bulging straight line from just below the iliac crest to the knee cap. On either side of the latter is a twin mass of muscles. That of the outside (vastus externus) makes one mass with it, and slightly overhangs the ilio-tibial band outside. That of the inside (vastus internus) bulges only in the lower third of the thigh, and overhangs the knee on the inside. Behind and inside of this is the groove of the thigh occupied by the sartorius muscle, passing from the ilium above to the back of the knee below. Sartorius Rectus femoris Sartorius From spine to ilium in front to tibia inside. Action Flexes, abducts and rotates inward thigh. Rectus Femoris From anterior inferior spine of ilium to common tendon of patella. Action Extends leg.
We see again an example of the compensation system of the body, another manifestation of the eternal equilibrium. In the lower part of the leg, the tibia, being actually subcutaneous, gives the structural direction at once in the thigh the femur is less evident, yet its inward slope, greater in woman than in man, is still disclosed by the diagonality of the superior mass of the tensor fasciae femoris at one end, and the vastus internus at the other, combined with the actual intermediate shape of the rectus femoris. The sar-torius serves to call attention to this diagonal feeling of the mass arrangement. At the back of the leg the principal facts belong to what one might term a secondary order they follow suit to a proper establishment of the facts of the front of the leg, though of course modelling should be carried out
When someone is standing up straight, the hip joint is located exactly vertically over the foot. Sartorius Figure 2.28. The sartorius Figure 2.28. The sartorius Its name means four heads , but only three of them are clearly visible. (The fourth one lies behind the middle head, the rectus femoris.) They stretch the knee, and the one head that is connected to the hip bone also helps in swinging the leg forward.
In reality it represents the edge of an imaginary thin curved surface, superficial on the front of the thigh, lying behind the tibialis anticus mass of the shin, and even passing through the thickness of the tibia itself. This curved surface has no anatomical being it is a kind of rhythmic abstraction, a rhythmic law which governs the mass arrangement. Obviously when the knee or the hip-joint is bent, the curve takes on another shape, which may be easily imagined. The necessary things are to point out the existence of such a curve and the need for seeking similar curves of union throughout the whole body. The draughtsman incapable of applying such a doctrine to each particular case is devoid of the essential sense of rhythmic cohesion without which he can never become an artist. I must, however, call special attention to a point already mentioned, namely that such a curve is neither necessarily superficial nor is it necessarily profound, placed inside the...
Whether this be so or not, we are in the presence of the drawing of a capable artist, of an artist determined to show us to the best of his ability the way in which the human frame is built up. To this effort he brings an unusually good vision in the third dimension. He gives us an excellent idea of the solid shapes of the different parts, and of their spatial relations to one another. Also the admixture of bony and muscular anatomy is very nicely calculated to show us the relative importance of each in each different part of the body. The viscera, are extracted, thus showing us, in the front view, the cup of the pelvis which held them. The four front constructional points, the anterior superior iliac spines, which stand out into space, and the pubic spines which are less clearly seen, at once show their importance. It is perhaps to be regretted that the two Poupart's ligaments have been eliminated they help to give a constructional signification to the...
I he cage and the pelvic bones are connected by a portion of the spine called the lumbar region. Muscular power acts on these masses as levers and allows the body to move forwards and backwards or turn. The pelvis can be compared to a wheel with only two spokes the hub is the hip joint and the spokes are the legs which swing back and forth as in walking or running. When force is applied to the long end of a lever, the power is increased. When speed is desired, the lever is shortened.
Hip-joint expand the range of uses to which the legs and feet can be applied in such activities as kicking and swimming indeed, the spine and joints of some individuals - 'double-jointed' people -are so flexible that their bodies can be contorted into almost any conceivable position, with the limbs held at almost any angle relative to one another.
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