AND FAMILY DISPENSATORY. 37 
59.59. lliaciinterni. 56. 56. Umbilical arteries. 57. 57. Epigaftric arteries. 60. 
62. Arteries of the penis and pudendum. 61. 61. Arteries of the bladder. 69. 69. 
0, 70. Crural arteries. 72. Arteries of the leg. 73. Arteries of the foot. 
OF THE NERVES, 
A NERVE or finew is a fimilar, fpermatic, membranous, long, and white, hol- 
low part: a common organ, ferving to carry the animal fpirits into all parts of the 
body for fenfe and motion. Its efficient caufe is the vis nervifica, the nerve-making 
power or faculty: its matter is a cold and clammy part of the feed. Their original 
difpenfation is from the medulla oblongata, partly as it is within the fkull, and 
partly as it is in the back-bone. Their end and ufe is to carry the animal faculty 
with the animal fpirits from the brain, for the fenfe and motion of the whole © 
body. And therefore the nerves inferted into the parts, give either fenfe alone, or 
both fenfe and motion, there being neither without help of a nerves for, a nerve 
being cut, the fenfe and motion of the part is loft. But this fenfe or motion is ac- 
cording to the parts where they are diffeminated, becaufe the nerves of themfelves 
are neither fenfitive or motive: if they are inferted into mufcles, (the organs of 
motion, ) they are termed nervi motorii, motive nerves; if into the inftrument of fenfe, 
_nervi fentientia, the fenfitive. Their fituation is for fecurity, deeper than that of an 
“artery : their magnitude is various, according to the nature of the organ, and 
dignity of the action. Thofe of the eyes are great, becaufe of the action ; thofe 
of the limbs, very great and thick, becaufe of their diftance and magnitude; thofe 
of the fenfory parts are in a middle proportion ; thofe of the neareft parts, as in 
the mufcles of the face, are the {malleft of all. The number of the nerves are 
taken from their conjugations or pairs, and are fo called, from their coupling or 
being double, for that they fprout out on both fides, except the laft or loweft, pro- 
ceeding from the fpinal marrow. The form or figure of the nerve is long, round, 
and fmooth, like conduit pipes: folid to appearance, having no fuch hollownefs as 
the veins and arteries have; but they have cavities or pores, for the carrying off the 
animal fpirits, though not perceptible to the eyes. The fubftance of all the nerves 
is compofed of many nervous fibres, which grow mutually together by little mem- 
branes; and this fubftance is thought to be three-fold: 1. the internal white and 
marrowith, from the marrow of the brain, but more compact and thickened: 2. 
an inner coat, from the pia mater; @ an outward coat, from the dura mater ; but 
thefe things fenfe cannot difcover.' The fubftance of the nerves are alfo either 
harder or fofter: the harder are-fuch as either go a great way, or through fome 
hard body, or by acrooked way, or are ordained for motion, which requires ftrength ; 
29. a ani 
