EXTERNAL SCAPULAR REGION. 397 
make these discrepancies more clear, and to lighten the labours of the 
student, the following table of synonyms is inserted :— 
TABLE OF SYNONYMS OF THE MUSCLES OF THE SHOULDER AND ARM. 
NAME GIVEN IN THE TEXT. USED BY PERCIVALL. ADOPTED BY CHAUVEAU. 
ATILCASPIBALUS Ne ee) oes ee) ee) Ditton eo 0. Sur épineux. 
Posteaspinatus . . .-.... .. . Ditto. . . . . Sous épineux. 
Coracohumeralis. . ....... . Ditto. .. . . Coraco-huméral. 
lee eK, G6 5G) Sob 685 6 biting eo Long fléchisseur de l’avant-bras. 
Subscapularis . . . . . .. .. . . Ditto. . . . . Sousscapulaire. 
Teresinternus velmajor . . ..... Ditto... . . Adducteur du bras. 
Seapulominaris’ 20 1 Not given . . . Jong extenseur de l’evant-bras. 
Scapulo humeralis posticus . . . . . . Notgiven . . . Scapulo-huméral gréle. 
Triceps extensor brachii—caput magnum . Ditto . . . . . Gros extenseur de Vavant-bras. 
3 9 parvum . Ditto . . . . . Courtextenseur de l’avant-bras. 
Hf a medium . Ditto . . . . . Moyen extenseur de l’avant-bras. 
Teres externus velminor’. . . ... . Ditto. . . . . Court abducteur du bras. 
Scapulo humeralisexternus . . . . . . Notgiven ... Long abducteur du bras. 
Humeralisextemus. . ....... Ditto... . . Court fiéchisseur de l’avant-bras. 
Anconeus ...-......... Ditto... . . Petit extenseur de l’avant-bras. 
EXTERNAL SCAPULAR REGION. 
ANTEA SPINATUS lies upon the anterior fossa of the scapula. Origin 
—from the anterior angle, border, fossa, and anterior surface of the spine 
of the scapula. Insertion—bifid ; one part to the outer, the other to the 
inner tubercle at the head of the humerus, the insertion extending from 
the tubercular summits to a roughened depression, just posteriorly placed 
to each. This bifid insertion embraces the tendon of the flexor brachii. 
Action—to draw the scapula into the same line with the humerus. 
PosTEA SPINATUS is situated upon the posterior fossa of the scapula. 
Origin—tfrom the posterior angle, border, fossa, and posterior surface of 
the spine of the scapula. JZnsertion—bitid: one portion to the postero- 
external tubercle ; the other is tendinous, and passes over the postero- 
external tubercle to a depression just below the outer tubercle. Action— 
to flex the scapula on the humerus or vice versd. 
ANTERO-INFERIOR SCAPULAR REGION. 
CorRAcO HUMERALIS is situated on the infero-internal part of the 
shoulder. Origin—from a tubercle on the inner side of the coracoid 
process of the scapula. Jnsertion—bifid : one portion to a tubercle on 
the middle third of the antero-internal part of the body of the humerus ; 
the other passes over the insertions of the teres internus and latissimus 
dorsi, just below which points it is inserted. Action—to extend the 
humerus and draw it inwards. 
FLEXOR BRACHII is placed upon the antero-inferior part of the shoulder. 
Origin—tfrom the antero-inferior part of the coracoid process of the scapula, 
passing over the trochlea formed by the tubercles of the humerus. Jnser- 
tion—to the supero-anterior and inner part of the body of the radius. 
Action—-to extend the radius, and at the same time to elevate it. 
THE INTERNAL SCAPULAR REGION. 
Suzscapunanis fills up the venter scapula. Origin—from the two inferior 
thirds of the ventral surface, extending from the anterior to the posterior 
border of the scapula. Jnsertion—to the inner ridge just below the lesser 
tubercle of the humerus. Actéon—to draw the humerus inwards and 
upwards. 
