and opposed in an oblique life, as may be perceived by the motions and site of the Muscles of the Hand taken in general.
The third, called the Rectus, or Right (because it descends above the Crureus, alongst the right fore-line of the Thigh, between the two vast Muscles) comes forth between the extremity of the Appendix of the Hanch-bone and cavity thereof, with a very strong Ligament, and then is inserted into the fore-part of the Leg, passing over the midst of the Whirl-bone of the Knee; it extends the Leg, with the three following, but by accident it may help the bending of the Thigh.
The fourth and fifth are called Vasti, vast or huge Muscles, by reason of their largeness, the one of these is internal, the other external: they both arise with right fibers, from their original, but with oblique at their insertion, by reason whereof they both seem to have a compound action from a right and oblique motion; the right helping for the extention of the Leg, but the oblique to draw one Knee to another, or to disjoyn both the Knees; the internal comes by its right fi∣bers from the root of the little Trochanter, but by its oblique from the inner descendent line of the Thigh. The external passes forth by its right fibers from the root of the great Trochanter, but by the oblique from the external descendent line of the same bone. But all these fibers are in cer∣tain places so mixed with the Crureus, that they cannot be separated unless you violate the one of them; they go into the Leg (each on his side) above the Whirlbone of the knee alongst the sides of the right Muscle, with which it makes an unseparable tendon, as you shall presently hear. The s••xt and last of these fore Muscles called Crureus, or Thigh-muscle (by reason of the strait and firm adhesion, which it hath with the Thigh-bone, which is by some called Crui) from the space between the two Trochanters descends under the right-Muscles, and two vast Muscles into the fore-part of the Thigh, even to the Whirl-bone of the Knee. But we must note, that these four last Muscles make a common thick and broad Tendon, with which they cover the Patella, or Whirl-bone, and all the fore dearticulation of the Knee, that they cannot be separated without tearing; wherefore we must think, that this Tendon serves the Knee for a Ligament; now all these Muscles performing their action together, extend the Leg. The five hind-Muscles follow to be spoken of; of which three arise from the tuberosity of the Huckle-bone, going into the inner part, the fourth from the middle of the Pubis called Biceps, that is, the two-headed Muscle into the outside of the Leg. Of the internal, one passing from the fore-mentioned tuberosity, descends Ligamentous even into the midst of the Thigh, and then becoming fleshy, is inserted by its Tendon, after the manner we formerly mentioned.
The other being slender, passing forth also from the same place, with its Tendon, is inserted with the Tendon of the Long-Muscle, and ends in the inner part of the Leg, which with its com∣panion, it draws inwardly, and brings to the other, which same thing it performs in the Thigh, by the help of the three-headed Muscle.
The third being the inner, or hinder, descends from the middle part of the Share-bone, with a broad and slender Ligament, and is inserted with a round Tendon, into the inner part of the Leg after the manner of the fore-mentioned.
The fourth called Biceps takes one of the two Heads, of which it consists, from the last mention∣ed tuberosity, the other from the outer-line of the Thigh, but is inserted into the external part of the Leg, as we formerly said.
The fifth and last called the Popliteus descends obliquely fleshy from the external condyle or knot of the Thigh, into the inner and hinder part of the Leg, at the joyning thereof to the Shin-bone; the action thereof is, to draw the Leg, after a manner inwards.