The Hillsborough recorder. [volume] (Hillsborough, N.C.) 1820-1879, 1859-07-06
For the Marlborough Recorder.
DEN tai SCIEN G L !.
NERVES OF THE TEETH.

fifth pair, and are nerves at sensatlon' II
branches from the spinal chord, and has Its
root ganglion. and is therefore called {
cranial. spinal nerve. Ii energies at the side
of the Pons. Varolii on the anterior part OF
the crus cerebeili. From this II passes Tor
ward in a canal OF the dura-mater on the an
terror side Of the petroas bnne, and then ex-
pands into ganglion called the Gdsser.da
ganglioa From the Gasserian ganglion pro.
ceeds three branches: the ophthA!mic. the
superior maxillary, and inferior maxIllary
nerves. The two latter nerves supply the
teeth and are anatomcally arranged thus
the superior maxillary arises from the middle
Of the gsngion Of gasser, passes through the
foramen rotundum of the sphenold bone into
the pterygo- Hillary fossa--at this point II
send. OF several branches, two OF which de-
scends to join the ganglion OF meckel. The
main trunk Of the nerve then continues on,
aud on account of its passing through the
mira orbital canal il is called the mira orb,
tai nerve. II then appears between the le
yatnr iabii snaeflats aarqae nasl, aud leya-
Tor angnlis orls muscles. The mira orhtal
nerves, just before emerging, sends down IN
the anterior dental canal, IN front OF the an.
trum, the anterior dental nerve. which gives
off filaments to supply the teeth OF the upper
jaw and antrim of the mouth, as we'll as the
lining membrane.
The inferior maSillary nerve forms the
third and largest division OF the nth. II
arises from the lower part Of the 'ia,serlan
gaagiiOn, passes through the toramrn 0Nale
Of the sphenoid bone, aud unltes with the
motor root.
The Inferior gives of the branches which
supply the teeth Of the lower jaw. This =
the inferior dental nerve. THIS nerve gives
off but one branch, which passes intu the
mylo-hyoideus and digastric muscles, and Is
called the mylo-hyoideus nerve. This Is the
anatomical formation Of these nerves, and
now physiologically the 9th, trigeminal or
trifaical nerve resembles the spinal nerve,
because its branches are derived through two
ronts. namely, the porto major and porto
minor.
Through the branches of the ganglionic
portion of the fifth nerve all the anterior and
antero-IateraI parts Of the face aud head. with
the exception Of the parotid region. acquire
sensibillty. All the muscles also acquire
muscular sensibility through the filaments
OF the gsngioric portion Of the nth nerve
distributed 10 them with their proper motor
nerves.
Longet saws that the sensitive functions OF
the branches Of the greater division Of the
fifth nerve is proved bv all the usual eSIden-
ces, such as their distribution in pat, that
o-e sensitive and not capable Of muscular
contraction, The exceeding sensibility OF some
Of these parts, their loss 81 sen'ation wnen
the nerve IS parslyzed or broken, the PAIN
without COMMISSIONS produced BY morbid or
experimental irritation Of the trunk or branch
es Of the nerves, aud the analogy Of this pnr.
tion Of the fifth 10 the posteriOr roots Of the
spinal nerve.
The fifth nerve is intimately connected
with the muscular movements through the
many reflex acts OF muscles of which il Is
the necessary exeitaat; 1t acts through u
ciliatory branches and the branch which
forms the long root Of the ophthalm, upon
the movements Of tie iris.
A singular connection between the hiih
nerve and the sense Of sight - shawn ~ ca
ses Of no gufreqlent occurrence, in which
blows Or uiber injuries impllcajlng the ifnniai
nerve a. il passes over the brow, are Follow.
eli by total blindness 10 The corresponding
eve. Thi. blindness appears % be the con.
sequence of defective metrltlon u the retIna !;
for although III some cases il has en-ued inn
mediaiely, As II from concession II the retina,
vet ia sone il las come on gradually like
sIaaly progressive amagross, aud IN WHICH
innammatotY Reorganization fillOwel BY
strophy Of the whole eve. And again, the
fifth nerve is shown to be intimately connect.
ed with the tblfd by cases 10 which paralysis
Of the third la. followed neuralgia Of the
fifth. Tie sense. Of hearing, also, Is impair
"a IN many cs.es by paralysis Ut the iactal
nerve: at naly III suci, cases a are Insiau-
C.. uf slmuItanroa. disease 10 the su.llt0rs
nerves. htt IN .uch cases q. NAV BE- explain.
ell Nv tie lnss II power ID tae muscle, u the
internal ear. Tae sense II smell !. a. the
same time commonly inpaired through tie
inasility % dras str Ort.kly towards the up.
per part of tie nasal cavities, - which pat
alone the OliAgtury nerve. are Distributed !
because 10 draw the ar perfectly 80 M. IL.
reeti0n, We are told that The action 0t TIE
diatuts and compressor. should be perfect.
I.a.ft, tie sen.e II ts.ie - impaired, ~
MA, be wholly ln.t 80 paralysis 81 the lastal
nerve, provided Tie .B1rre 81 the psfals -.
be ID SOME part betseen i's origin aud ills
giving Oh II lie chefaaymg.ni. We can
NNtieAUER8 0Mtg eWpWb-1 AhAA AME $500 ~
movement 81 these muscles 81 the tongue i
essential II ibe exercise II taste . TACT, II i
be -, which i the more singular, because
fhp sense II tate i uo, materially imprrel
in case. d IafalYsis Of sll tie other muscle
of the tangae through injury Of tbe inpO
glgssac nerve.
These and many other facts 60 to Prov
the necessity Of due attention TO the teeth
for, q. has been shown, TIE great sympathy
eii.ting betWsen the teeth aud the organs .
sensation, which j. nothing more than ihi
sympathy ii tie whole for part, the nerve
whirh ehtsf he apex u The rUIt 81 rart !
merely branch. aud often 40 in.ignifcan
branch, u the great nerve IL sensatiun, whitl
nerve, Ike Al Ufher., i a sprig u the gfea
spsal chOrd-thst gem u mans existenr
aud prBetestioB.
De.pise not twig, since ], issue. from III
tree Of life.
a. Ia.