The anatomy of humane bodies epitomized wherein all parts of man's body, with their actions and uses, are succinctly described, according to the newest doctrine of the most accurate and learned modern anatomists / by a Fellow of the College of Physicians, London.

CHAP. XXIII.

Of the Muscles of the Radius.

THE Radius, the other Bone of the Cubitus, hath two sorts of Muscles: for some are cal∣led pronatores, such as turn it inwards, and the Palm of the Hand downwards; and some supina∣tores, which turn the Radius outwards, and the Palm of the Hand upwards.

The pronatores are two in number.* 1.1 The first is, pro∣nator superior rotundus or teres. This springeth from [ 1] The Root of the inner knob of the Shoulder-bone, and from the inner side of the ulna, where it is joined to the Shoulder-bone; and running obliquely on the inside of the Radius endeth about its middle by [ 2] a membranous Tendon. The second is pronator inferior quadratus, which is altogether fleshy. It springeth from the lower and inner part of the ul∣na two Inches broad; then marching transversly above the Ligament which joyneth the radius to the ulna, it endeth in the inside of the radius. The ending is as broad as the beginning; where∣fore it is called quadratus or four-square.

The supinatores are in like manner two.* 1.2 The first is supinator longus, so called, because of all the [ 1] Muscles which march by the ulna, it hath the long∣est Belly. This springeth fleshy from the edge of the outer knob of the Shoulder-Bone; and march∣ing obliquely under the radius, is implanted by a membranous Tendon into the upper part of the lower appendix of the radius, bending somewhat

to the innerside. The second is supinator brevis. [ 2] This springeth from the outward part of the li∣gament in the jointing of the lower end of the Arm-bone, and from the hinder Process of the ulna; from whence it passeth on obliquely, being without membranous, and within fleshy, and is inserted into the middle of the radius.

Note that though for orders sake we have de∣scribed the Muscles of the radius next to those of the ulna; yet when one would shew them in Dis∣section, the Muscles of the Fingers, Thumb and Wrist are first to be raised, and then these of the radius after those are taken away.

Notes

• * 1.1

  The prona∣tores.
• * 1.2

  Supinato∣res.