FARRIERY. 
difjindl parallel fafcicula?, from the point of the flernum, 
where it joins the mufcles on the oppofite fide; and it 
paffes, forming a fla11ifh tendon, to the humerus. The 
flubfcdpularis occupies the underfide of the fcapula, with 
which it accords in figure. Growing narrower with this 
bone, it defcends, forming a broad tendon in the large 
inner procefs of the head of the humerus, and will admit 
of being feparated into feveral fmaller mufcles. Thefe 
tliree are the adduttor mufcles of the humerus. 
The mjjfpinatus mufcle-occupies the offeous part of the 
fcapula behind the fpinous, ridge ; it grows narrower 
with the bone till it reaches the joint, where it forms a 
lubricous cartilage, which is kept in its fituation by two 
round prominences in the head of the os humeri, afting 
like the fides of a pulley ; it then terminates on the exter¬ 
nal round procefs of the head of the humerus. The 
abdiiRor longus, or teres minor, takes its attachment at the 
fuperior part of the pofterior edge of the fcapula ; in de¬ 
fending it clofely adheres to the poWpinatus , becoming 
gradually broader and more flefliy; it terminates on the 
curved procefs, which is obfervable on the upper part of 
the exterior furface of the humerus, following the. fame 
direction on this fide as the addudtor does on the oppofite 
fide of the bone. The abduclor brevis, takes its rife at the 
inferior and poflerior edge of the fcapuia, or rather from 
the fibres of the poflfpinatus mufcle, lying between it and 
the long abductor. This and the former pafs over the ex- 
tenfors of the cubitus, and terminate between the above 
mufcles on the large crooked procefs of the humerus. It 
only differs from the former in being conliderably fhorter. 
It fends a tendon to the fcabrous edge of the cotyloid 
cavity. Thefe are the abduElors. 
The mufcles of the radius and ulna, are feven ; two to 
bend, five to extend them.—The extenfor longus feu po/lcrior 
mufcle, is the mod exterior of thofe which fill up that 
triangular fpace formed by the humerus and fcapuia. It 
takes attachment at the fuperior and poflerior edge of the 
fcapula, and palling down clofely, adhering to the large 
extenfor, it terminates on the extreme point of the ole¬ 
cranon. This mufcle is the mod powerful of any of this 
extremity. The extenfor magnus is nearly the larged muf¬ 
cle of the fore extremity, of a triangular figure, and oc¬ 
cupies great part of the angle between the humerus and 
fcapula pofletiorly ; it rifes by tendinous fibres from two- 
thirds of the poflerior and lower edge of the fcapula 
growing narrower, it terminates on the inner fide'of the 
olecranon by drong and fliort ligamentous fibres. The 
extenfor' tranfverfis mufcle, is of a figure nearly fejuare ; 
pading obliquely acrofs the other mufcles, it rifes from 
the interior part of the crooked fpinous procefs of the hu¬ 
merus, and terminates on the point of the ulna, uniting 
often with the preceding. The extenfor pygmaus is fituated 
beneath the others; of a cylindrical figure, tapering to 
either extremity, riling from the middle part of the hu¬ 
merus, and terminating by a tendon on the infide of the 
olecranon. The extenfor minimus is a finall mufcle, of a 
pyramidal fiiape, vvhofe bafe is fixed by flefhy fibres to 
the olecranon on its anterior edge; growing narrower, it 
terminates by flefliy fibres on the back part and infide of 
the humerus, rather below its middle ; this mufcle fills 
up the cavity formed by the two condyles of the humerus 
poderiorly. Thefe extenfor mufcles draighten the limb 
after it has been carried forward by the flexors, railing the 
body upon the extremity as a fixed point. 
The coraco-radialis is a very beautiful mufcle, externally 
covered with a ligamentous coating, which gives it a (11- 
very appearance, efpecially on its infide ; a drong tendi¬ 
nous falcia enveloping it ; it occupies the front of the 
humerus, extending from the coracoid eniinetTce of the 
fcapula to the anterior part of the head of the radius, to 
which it is fixed by drong, fhort, ligamentous fibres. Near 
its lower extremity it fends off a drong tendon, which, 
pading along the radius, inferts itfelf into the tendon of 
the extenfor mufcle of the (hank. This mufcle, in paf- 
fing the joint, is lodged between the two circular fmooth 
prominences on the anterior part of the head of the hu¬ 
merus, and is provided with a lubricous cartilage beneath. 
This is the biceps mufcle of the human anatomy. The 
flexor convolutus , or brachialis internus, lies in contaft with 
the bone, filling the large cavity or neck of the humerus ; 
formed by the curved procefs on its exterior part, it rifes 
under the poderior part of the head of the humerus, 
making a fpiral turn ; it paffes over the bone, filling the 
cavity above-mentioned, and terminates anteriorly in the 
hollow of the head of the radius. Thefe two mufcles 
are termed flexors ; they carry the lower part of the ex¬ 
tremity forwards, and the extenfors ferve the purpofe 
apparently of removing the body to it as a fixed point on 
the ground. 
The mufcles of the knee and fiank, are fix, two to ex¬ 
tend, four to bend them. The extenfor carpi is the muf¬ 
cle which forms the handfome rotundity obfervable on 
the lateral and rather external part of the radius. It is 
attached fuperiorly to the anterior condyle, uniting to the 
extenfor of the foot; it decreafes fuddenly, forming a flat 
broad tendon, lying clofe to the bone, pading under the 
lateral extenfor tendon, and over the bones of the knee; 
it terminates on the fuperior part of the fliank-bone, on 
the anterior tuberofity, by drong ligamentous fibres. The 
extenfor lateralis mufcle, takes its attachment for a confl- 
derable length along the diarp edge on the external fide 
of the radius ; forming a.fiat tendon, it takes a direction 
acrofs the leg, and palling over the tendon of the princi¬ 
pal extenfor, purfuing an oblique direction over the bones 
of the knee, it terminates on the infide of this joint, on 
the os pollicare. Thefe are the two extenfors. 
The flexor carpi poflerior mufcle, has an attachment by 
drong tendons to the poderior and lateral external part o'f 
the humerus ; increaling in fize, and becoming very fiat, 
it defcends down the radius, forming a large flat tendon, 
dividing into two parts ; one is ftrongly inferted into the 
crooked bone, or os podicum ; the other paffes to the 
fliank ; and is inferted on its head. Th eflexor oflis pofhci 
mufcle, takes its attachment on the oppofite fide of the 
humerus to the former, fending off a confiderable branch 
to the infide of the olecranon : it terminates by a drong 
tendon on the external convexity of the pod-carpal bone! 
The flexor internus mufcle, is fmaller than the two former, 
and is placed more internally ; it takes attachment at the 
lateral internal condyle of the humerus, and, pading along 
the radius, forming a thin tendon, which palfes through 
the capfular ligament, it at length terminates oit the pof¬ 
terior part of the cannon or fliank-bone, and fufpenfor li¬ 
gament of the perforans mufcle. The flexor poffrenius 
mufcle is the mod poderior of thofe about the head of 
the radius, extending from the point of the ulna on its 
infide to the annular ligaments of the knee, uniting to the 
cartilage which furrounds the flexors of the foot; its 
aponeurofis covers the whole furface of the extenfors of 
the cubitus. Thefe are the four flexors. 
The mufcles of the paflern, coronet, and foot, are five; 
two to extend, and three to bend them. The extenfor 
fuffragims is a (mail thin mufcle, rifing by flefliy fibres 
from the external condyle of the humerus ; it paffes 
flefliy about half way down the radius; adhering to its 
external (harp edge, it paffes in a groove through the an¬ 
nular ligaments and capfular ligaments of the knee, and 
continues its courfe along the outfide of the (hank to the 
fetlock, where it becomes wider, and terminates by a 
broad tendon on the fuperior anterior part of the pafiern- 
bone. It fends off a branch of tendons, which paffes 
round the knee to the flexor tendons under the podcarpal 
bone. . The extenfor pedis is the larged of that affemblage 
of mufcles which furrounds the head of the radius. It 
arifes from the external condyle of the humerus ; uniting 
its flefhy fibres with thofe of the extenfor of the cannon 
or fliank, it becomes tendinous above the knee, being 
lodged and confined by ligaments in a.groove ; it perfo¬ 
rates the capfular ligaments of the joint, and, pading 
down the front of the (hank at the fetlock joint, it forms 
2 an 
