Page 161
Glutaeus Medius.
THis Muscle ariseth under the former,* 1.1 much like it both in site and magnitude, from the forepart of the Spine, as also from the back of Os Ileon, Fleshy, broad, and semicircular, and obliquely descending, narrows it self, and doth enwrap the Juncture as the former, and is implanted by a broad, strong and Membranous Tendon transversly into the fourth impression of the great Rotator;* 1.2 This is said to extend the Thigh and draw it upwards, and laterally forwards, as some imagine, but I humbly conceive it assisteth the Glutaeus Major, and depresseth the Os Femoris: and after it is lifted up by the Psoas and Iliacus Internus, this Muscle pulleth it down a∣gain, and is as an Auxiliary Muscle to the Glutaeus Major, and Minor, in the extension of the Thigh.
L. L. Shews this Muscle in situ at Tab. 28. e. e. Shews its Fleshy beginning, B. B. Shews the same in situ, Tab. 29. D. e. f. Shews it laid bare, D. D. D. Shews its Fleshy beginning, E. Its Fleshy Belly, F. Its Tendon.