The text describes the anatomy of the thigh and leg muscles. It details the origins, insertions, and functions of the three-headed muscle in the thigh and the main muscles in the leg, including the anterior tibialis and fibularis. It also discusses the soleus and flexor of the toes muscles on the inner side of the leg.
THE DRAWING
The thigh is occupied by the three-headed muscle, which originates from the yoke and inserts into the bone of the thigh to rotate it inward. The muscles at the back of the thigh, on the inner side, following the three-headed muscle, are the slender muscle; after that comes the semi-membranous, and then the semi-nervous, all of which originate from the bone of the yoke and insert into the bone of the leg on the inner side behind the knee.
On the outer side and also behind the thigh, following the outer vastus, you see the two-headed muscle, which comes from the bone of the yoke and inserts at the back of the leg, on the outer side of the knee, creating a division that seems to partition the back of the thigh in this area.
The leg has its main muscles on both sides and the back. On the outer side of the bone, there's a muscle called the anterior tibialis, which originates on the outer side of the knee and ends at the ankle by a tendon, drawing it upward. Beside it is the fibularis, originating also from the outer side of the knee, at the top of the fibula, and descends behind the external ankle to the foot. Between the anterior tibialis and the fibularis, there's another muscle of similar origin called the extensor of the toes. Following these is the outer twin muscle that embraces the leg and joins the inner twin muscle from behind.
These two muscles pleasantly bulk up the leg just below the knee, from the back and from the sides.
On the inner side of the leg, there are two muscles; one called the soleus, because it is unique in its function, and the other is called the flexor of the toes, next to which is the inner twin muscle previously mentioned. The two twin muscles originate from the bone of the thigh and end.
Translation Notes:
- "Yoke" refers to the bone area where multiple muscles originate.
- "Anterior tibialis" and "fibularis" are modern names for muscles described in the text.
- "Semi-membranous" and "semi-nervous" refer to muscular aspects that could be complex for non-anatomists, involving both structural and nerve-related functions.