OBLIQUUS. 
the convexity is turned outwards ; it proceeds, together with 
the pofterior layer of the obliquus internus, behind the rec- 
tus to the linea alba; but it is fplit autvegely at about the 
midway between the navel and pubes, and the lower part 
goes over the re€tus to the linea alba: this is inferted below 
in the pubes 
Faftia tranfuerfalis. —Behind the crural arch, the inferior 
edge of the obliquus internus and tranfverfua is placed, ex- 
tending from the middle of ae arch to the pubes, and co- 
vering behind a part of the ring of the external oblique. 
thin fafcia, called tranfvertalis. is extended from the crural 
arch behind the tranfverfus m ufcle, on the furface of which 
it is gradually loft. By this the ring of the external oblique 
is clofed towards the abdomen ; and, but for this there would 
be a dire& opening into the belly behind ner ring ; 1t alfo 
fhuts up the flit under the inferior edges of the mutcles juft 
mentioned. It confifts of a thin and delicate pie a nis 
has often a very diftiné fibrous texture near the crural a 
If we trace it from this a upwards, we fhall find it divided 
immediately into two portions, an internal and agains 
which have between them a confiderable interval, jut in 
middle of the crural arch. The former of thefe is pooneéied, 
by i its inner edge, to the outer margin of the re€tus abdo- 
minis, and to the inferior margin of the tendon of the ob- 
liquus internus and tranfverfus ; i both are oe loft 
above between that mufcle and the peritoneum. The pof- 
> 
= 
asac upper or inner 
aperture ( and the lower 
border of the internal aie ie and tranfverfus mufclee,) is 
rather nearer to the es than to the ilium; the lower or 
outer opening is the triangular ture in the o us ex- 
ro 18 € the ex- 
abdominis (fertepubin palpi mufcle, of a 
flat ie fe meafurin ngers’ breadths 
acro{s, and extending along the front of the men, from 
a 
enfiform cartilage, the pofterior layer of the internal oblique, 
internal mamma te >’ 
ternas, and by the a 
this layer is deficient, and t 
5 conedted to th 
te n the eons 
part of the pobes behind thofe of the three broad abdo- 
minal mufcle 
e flethy “fibres of the re€tusare interrupted on the front 
by tranfverfe portions of tendon, exterding from one fide 
to the other, called tendinous enervations or interfeGtions, and 
varying from three to five. 
below, and two or three abov ay 
be wanting. The latter of ets extends only half way acrofs, 
‘Their breadth eh: but does rot exceed a aang or half 
an iuch; and their dire@ion is zigzag. The front layer o 
the tendinous theath con fo dlotely to thefe ered ons, 
that it cannot be feparated without cutting them. 
The praatdi (pao) is a {mall mufcle of a 
oblique from below upwards. e varly the whole of the 
mufcle is fle: e internal fibres are the fhorteft, and 
oy radually i increafe in lengt s the o edge. 
: 
gt 
iqui and tranfve 
t; and it covers behind the inferior extremity of the 
he 
«pyr ramidalis varies confiderably in fize; and fome- 
ines : altogether deficient ; fometimes it is found on one 
fide 
Marine produced by the abdominal Mufcles.—Thefe organa 
may be ar as protecting the abdominal vifcera, and as 
the ca a of various movements iii the cheft, abdomen, 
them a ver 
are fixed, the abd minal muj{cles 
contract the cavity of the belly, and prefs on the vifcora ; 
ce Te and 3 internal | oblique have the greateft effe& in 
Wane crannnt? concur 
any 7 Fin lige than when they vi ansoone trig linea from the 
cheft to the dja The enlargem ion of the 
abdcmen ga an almoft entirely in reat ; the ‘belly. rifes at 
that in eepistinn and finks again in expiration, In this 
fi nall the abdominal viloera are conftantly changing 
their aoltiod from the a&tion of the diaphragm and abdo- 
minal mufcles, See the — on of the motions of the 
cheft, in the article Lune ie 
