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)

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secretion of the capsule: of these bursae we observe one under
the tendon of the sub-scapnlaris, one under the short head of
the biceps, one between the coracoid process and the scapula,
and a %7ery large one under the acromion process. The mo-
tion of the shoulder-joint is restrained, and the joint rendered
more secure—by the acromion process, which projects over
it:—by the coracoid process below :—by a strong ligament,
which extends from the coracoid to the acromion process :—
by a ligament extending from the acromion to the capsule of
the joint:—and principally by the action of the four muscles
which are inserted into the capsular ligament.

The shoulder-joint is more liable to luxation than any
other in the body ; and this arises from the loose-
ness of its capsular ligament, the shallowness of the
glenoid cavity, and great exposure of the upper extre-
mity. The head of the humerus may be dislocated up-
wards, downwards, or laterally, and the dislocation
may be simply the removal of the head of the hume-
rus from the articular cavity, or it may be accompanied
by a laceration oi the capsule, the head protruding
through it; in which case it is very difficult to reduce :
it may also be accompanied by a laceration of the
long head of the biceps muscle, which passes through
the joint, and is attached to the side of the cavity.

Use. To defend the back, and give articulation to the hu-
merus.

The scapula, with respect to shape, is perfect at birth.
The acromion and coracoid processes are cartilage.

THE ARM.

The brachium, or arm, con.--.ists of one long bone, tire of
ferachii.

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