Hooper, Robert [Hrsg.]: The Anatomist's Vade-Mecum: Containing The Anatomy, Physiology, Morbid Appearances, &c. Of The Human Body ; The Art of making Anatomical Preparations, &c. To which are added Anatomical, Physiological, Medical, And Surgical Examinations For Students (London, 1811)

( A8 )

OS BRACHII.

Os brachiale. Os humeri.

The bone of the arm occupies the space between the junc-
tion of the clavicle with the scapula and the fore-arm. It is a
long cylindrical bone, thickest at its ends, and distinguished
into body and extremities.

Eminences. The head, which is rounded on its superior
part. The neck, which is immediately below the head. The
greater tubercle, near the neck, on which a e three surfaces:
—the first of these, which is the smallest and uppermost,
serves for the insertion of the supraspinatus muscle ;—the se-
cond, or middlemost, for the infraspinatus ;—and the third,
or lowermost, for the insertion of the teres minor. The
lesser tubercle, which is near the former, and has fixed to it
the subscaptilaris. On the inferior extremity are three pro-
cesses, namely, an external and an internal condyle; these
condyles have a riJge continued from them upwards on the
sides of the bone: from the external ridge and condyle arise
the supinator radii longus, and the extensor muscles of the
fore-arm, whilst the internal ridge and condyle give origin to
the pronator radii teres, and flexors of the fore-arm ; and the
trochlea of the humerus, upon which the ulna moves.

Cavities. A furrow between the tubercles, for the long
tendon of the biceps : the edges of this groove are continua-
tions of the greater and lesser tubercles, and serve for the at-
tachment of the pectoralis major, latissimns dorsi, and teres
major muscles. This furrow in the fresh subject iias extend-
ing over it a tendinous ligament. A passage is observed about
the middle of the bone, in the fore and inner part, for the me-
dullary vessels. In the inferior extremity ;—a posterior fotsa,