Chap. 12. Of the Muscles of the Legg.
THe Leg is bent by the four musculi postici.
One of them has two Heads, termed Bioeps, the first from the joyning of the Os pubis, the second from the outer part of the thigh, and both of them are inserted with one tendon, the fleshy substance being first increased in the middle, into the hinder part of the Leg.
The second called Semimembranosus arises from the swelling of the Ischium, and is inserted into the inner side of the Leg, backwards.
The third is the Seminervosus, and has the same be∣ginning and the same end with the former, save that in the hinder parts it is carried little forward obliquely, before it terminates at the inside of the Leg.
The fourth is the Gracilis, which is inserted into the same place, and arises from the joyning of the share∣bone.
Four Muscles extend the Leg.
The first is the Rectus, arising with an acute tendon from the outer and lower Spine of the Ilium.
The second and third are the two Vasti, the external arising from the whole root, the great Trochanters, and the bone of the Thigh which lies under: the Inner from the small Trochanter: they are terminated on each hand at the side of the Rectus.
The fourth is the Crureus, fixed to the Thigh bone, as the Brachiaeus is to the Brachium.
These four Muscles, are terminated into one tendon, which embracing the substance of the flesh into it self, it is inserted before into the beginning of the Leg, and is there instead of a Ligament for it.
Two Muscles, pul it to, inwards.
The first is the longus, fascialis or sartorius which Spi∣gelius and Veslingus reckon among the benders, on which Tailors or Borchers rest themselves when they sit cross-leg'd. It is well nigh the longest of all mus∣cles, arising from the former Spina of Os Ilij, and descending obliquely unto the inner and fore-part of the Leg.
The other is the Popliteus arising from the lower and outer extuberancy of the Thigh, and being inserted four-square into the inner and upper part of the leg ob∣liquely.
The Abductor is one, which is called Membranosus and fascia lata.
It arises fleshy from the Spina of Os Ilij, and is car∣ried obliquely, into the outer part of the Leg, and with its most broad and long tendon, invests well-near all the Muscles of the Thigh.