The text describes the anatomical structure and function of arm muscles. It details how different muscles such as the Biceps and Brachialis enable movement of the arm. Note is made of their origins, connections, and their contribution to the bending and movement of the arm.
Muscle Function and Service
The Arm-Bone (22) learns there the hollowness of the Armpits. It has three types of Tendons; and five types of Conditions, through which it can move the Arm up, down, and straight, yet always can pull forward. Refer to Illustration A.
Biceps or two-headed Elbow Muscle; so named because it has two Heads or origins; one beginning from the hollow where the Head of the Arm-bone encloses. The other extends from the projection of the Shoulder Blade. These two origins unite with a strong Tendon, and in the forepart of the small Ulna (29), its function is to work with the following Brachialis or Arm Muscle (21) to bend the Arm. See Illustration A.
Brachialis or Arm Muscle. This springs from the Upper and Largest Part of the Arm-bone (22) with a fleshy origin, embracing the same Arm-bone, first itself with its preceding Co-associate Biceps (20) in Radius (29), and then continues into the Elbow-bone (26), its function is to bend the Arm with Biceps (20). See Illustrations A. B.
Longior Supinator, by some called the turner, because it turns the Hand over the Back, known with the Knuckles downward. It springs from the outer and lower part or projection of the Arm-bone (24) and in its Norwegian descending lower, into the lower part of the small Elbow-Bone (29.) It also has a Co-associate called Nervosus; and this also causes a Norwegian agitation, but this is not visible externally. See the mentioned Longior Supinator in the illustrations A. B. C.
Longus the first Long; or Extended Length.
Translation Notes
Franien: Likely referring to anatomical conditions or structures that allow movement.
Noors: Could be a term used at the time for describing a specific kind of motion or agitation, termed 'Norwegian.'