AND FAMILY DISPENSATORY. © 55 
‘The thumb is bent by two mufcles ; extended by two ; and drawn fide-ways by fix. 
Flexor primus, arifing from the upper part of the readin, is inferted into one of the 
joints, 2. Flexor fecundus, arifing from the wrift-bonhe, is inferted into the middle of 
the thumb, and lies: wholly under the former. | 3. Extenfor primus, arifing out of the 
upper and outward fide ofthe cubit, runs along the radius, is carried beyond the writt, 
and.is inferted into the firft and fecond joint of the thumb, by a double and fometimes 
triple tendon.» »4. xtenjor alier, arifes from the fame part of the cubit, but Tower near 
the wrift, and isinferted into the third yjoint.of the thumb: 5 Adduceas primus, is 
joined unto and feated beneath the shenar, arifing out of the three lower bones of the 
metacarpium, and is inferted into the fecond joint of the thumb ; this draws the thumb 
to the fore-finger. 6. Adducens fecundus, the fecond drawer of the thumb to the fore- 
finger ; it arifes out of the metacarpium, and is inferted as the other. 7. Adducens ter- 
tius, drawing alfo the thumb to the fore-finger, arifes out of the external fide of the 
wmetacarpium, which fuftains the thumb, and is inferted into the firft joint. 8, Addu. 
tens primus, or thenar, the firft drawer away, arifes from the infide of the wrilt, and 
isinferted-into the fecond joint of the thumb, to draw it from the fingers. 9, 10. 
Abducens fecundys and tertius, a as Wie former, to draw the 
thumb alfo from the fore-finger. 
~The fingers’ are bent, calinadags esd el mata} the petiole a 
which are feventeen mufcles; they are’as follows: /ublimis or perforatus, it arifes 
from the inner apophy/is of the arm, it is divided into four tendons inclofed in : a 
ligament) :as:it were’ in a ring, which are inferted into the fecond jointing of the 
fingers, avcleft being:firft-made, through which the tendons of the following muf- 
cles »pafsi::'Profundus ar perforans, is {pread out under the former, and is inferted 
through the clifts of the former tendons, into the third jointings of the fingers; it 
arifes from the upper parts of thewina or radins under the joint, and is divided into 
four tendons. Hypothenar digita minimi, proprius auricularis, the muicle proper to the 
little finger, it arifes in the hallow of the hand, from the third and fourth wrift-bones 
of the fécond rank, and is inferted externally into the fide of the firft joint Of the faid 
fingers: Extenfor magnus, arifes from the exterior apophy/is of the arm about ‘the 
wrift; and the ring-fafhioned ligament ;_ isdivided into four tendons, which end ia 
the lowermott joints of the fingers: Indicator indicis extenfor, it aries from the onidifte 
and external part of the cubit or ulna, seeped with a double tendon into 
the fecond:interjointure'of the foresfinger.” duricularis, the exten{or of the titele fine 
ger, ivarifes fromthe upper part of the pert sand, being carried along with | 
alea.and radius, ans the liaele aa ent cli ion, 
