Anat. Prac. (Head & Neck) Pt.2
Anat. Prac. (Head & Neck) Pt.2
Tongue
a) is a mobile muscular
1s
organ that lies
bhcuynax mainly in the
is dorsal surface is -oox odb and party in te
loo
divided
2. a)
posterior 1/3
Each half of the
Eac
bySulCuslptmiralis into anterior 25
tongue consists of four
and
QxbrensC
Extrinsic muscles are: untorait
muscles.
and four
ngossa
ii. alnopssa
SAlglossal.,
innervated.Paldoglosig
c) All the muscles of the tongue are
by
palodqloss.cal._which innervated hubndsa
by
is
anialmatqoreso
nerve except
3. Geniogiossus muscles
aare reponsible for
Dmusion
prevents the tongue from falling backward in the of the tongue.
pnphaunx
aFrom anterior e-Savirq
c)iscalled as
muscles of the Yongue.
2/3rd except circumvallate
papillae, general sensations are carried by
ingual nerve and taste sensation by
posteYior 1/3rd including circumvaljate papillae generalchodiaymbls
nerve.
b) From
as well as taste sensations are
carried by 9glossobhULgenerve.
c)Frqm the postërior most part general s well as taste sensations are car:ied by
Jnfoto
Oyngeal. nerve.
Prediet Question
The cancer of posterior 1/3rd of the tongue usually has poor prognosis.
3
lalaleptun(Riuch edge)
Cho anae wi
Nalal ConchaL
-Tubal eluvaion Nayephayn
-opentngof
alud to tube
Caviufmuth
R
c L Pala
Uvula
EPglottis o re phay
Paladun+orgi
Aryepglelti
fold
Taleo tongud
Laryngeal indt
Tteraytenoid Arlfosm fos
od Pot-cridordaas phetn
PHARYNX
Pharynx
isa fibromuscular tube, situated behind the:
Ose .
moudb ii. laun
xtends from thebase
extends from
the skll to theowen bosdondcarlage
b)
is divided
into three parts
Outoud
Nasa-pbaya. i. Uonophaynyii,Lawaeophay*
Thewall of the pharynx is composed offive layers, from superficial to deep these are
The
2
i uCusa haygeobagulepit. Musulan Lo
iv. BuLLophanngagl.VSSmutoso
Pharyngeal muscles Hzu
are arranged in 2 layers
a)
i. outer Cincuulan laga i iner lorgituhione laue.
b) circular layer comprises
PLovstiuhor
Supetuax P.lansii. Milal POmsboTnhe
c)longitudinal layer comprises
iStyloþhaugni Daloro phaye 3alpiuo phayia
all the muscles are inñerÝated through Cxan nenaerve except cLessocy
stylophaNheeal which is innervate by(hlosh phos nerve
Crgea
4. Structures passing thròúgh pharyngeal gaps:
constrictor :
a) between the base of the skull and superior
tuk i lausny
ll fscendialqdue
b)
iAuditoy
superiorand middle
between constrictor: PulaTu MUscle.
muwclu
14
ePbtts HHoid bor
Thyohyo14 merbore
-Carhiege trilien
Aatual thsoluof
sqon ent -0pening bs sufeuiu layngesl
meebon thmHoid veseland inenal lorrqed
igement heuve
Supeuos Conl of Hhrojd
THo d outlag
CrILoHhyso jd
ugemeh
Tneuo cornuof 4hrod
CHl-
Criotacheal
Mem6 14n
LARYNX
1. Larynxis the organ of
The
framework
louen_noapinatory trou (LRI).
of larynx is.made up of 9 cartilages, large unpaired
The
2
thnle ree
and
small paired.
a) paired cartilagesare
b)unpairedcartilarges are
Lomiuahei. unitosn
i
piglotis_
is
i_lhyoidi icoíd
3.
Laryngeal cavity divided into three parts :
leLgal_nerve.
b)belowthe vocal cords is by U10Dcounorn
Predict Question
nerve is damaged?
into the larynx ifinternal laryngeal
Why foreign bodies can easily enter
t e laoyx, Sevive pohte
tg- When any toujan body euuten e ofet. Howeu darye
wughig us ex ted to enpel
to Hhe exfeual Teugeal roe
aue arestkesja
memb mue "n the _uhag lbthis pvt ot
mucus the CUd. s o a t foren
rgjlex
t e lovy nx, bheakirg,
eten
body an ediolly
15
A t i u l a emunenu
Arhalarfosla
Th-Qguiulan
7ympanucplate
Head Condyle) of
onelu ble
TEMPOROMANDIBULAR JOINT
horomandibular joint is a synovial joint of
1.
2.
Ten
muscle.
Predict Question
is damaged?
larynx if internal laryngeal
nerve
the
bodies çan easily enter into
Why foreign is dameged,hee us
fig-It inteurod laougesu reoe
menmbreve un suoqloihs
avesthesa omuuus
boohree togh vefléx.s
au
16
CphenojdalaiuNnuseg
-Aontalaissinu
ehmoidal
al nule
oxbit
Nae
-HG cellauy auu
Sepum
Sinus
PARANASAL AIRIR
1. Nose
a)
is Cuun led Panamd shaped
is the organ of
b) Smal projection in the middle of the face.
c)consists of: i.
d)
is the most Bonea-(4
comnonly i lartrlcge:(5).
2. Nasal cavity actw1ed. part of the face.
(epistaxis).
AN-TheSowe o rauod bleedlig pt, epaastne iwy is to
re
are Cu illed filled cavities in the
bones aroyyd
are lined with
bsado shadified the nose.
eanasal sinuses are paired and lliadad epithelum
named according to the
bones containing them v1Z.
i.
omtadsinusi
Sphenod sinus Maxill ouy 3inus.
ivelhmofcdi
The functions ot paranasal sinuses are Sinus
toMaxillary
mue skull ligreali.
yi
Wavun up
A]1.
sinus i
burmkif teO nird
a)is located in the body of
b) is the
mOi lla.
lorgest DU1aNCua_air sinus.
c)is pufmfdal.. in shape.
dopens into the
middle.mecdus.of the nose.
(The opening of the maxillary sinus is near the roof than the floor which is an
disadvantageous position for natural drainage.)
2. Boundaries of the maxillary sinus
18
Inteunal ecs
middluear
F t e r n a le a h
Pinrna
S e m m u r g u l a
y gHdoochleas
nerve
CoeRLa
- Bory Patt
Aulien
caullgyonoy tude
Tympau
Pault
Concha
memb9ne
Bny
CoHlincy Pau alrinth Hadophoryn.
P
nlenal auditaymeat4.
EAR
gar
is the
organ of hecuUrg
Consists f three parts
ii. esteinal
MiddL
ear
ii. and
External :oustic meatus
i s approximately
ntënal_eat.
cm. long
s lateral 1/3rd
lateral
in its
h) 1/5rd is
Is
CCVti LigenoIM.and in its medial
is S-shaped and directed medi&llu 2/3rd is bony.
and
upwandu
1panic membrance thin membranous partition between the
is a
Predict Question
in children ?
Why middle ear infections are common
#r-hey vey uommov in
oe dien bLcowe tey Jeal
tyouhoh
he iddleea rem ubpon uphrauOy
starng nyecffon
pray mpha tube.. he lorg meckiawhh ciniall
hod +o ne supbunatie obti
PTOs o eu dlischoe ancd peruomatin of
Tmpme memlo yoe.
19
EXTRAOCULAR MUSCLES
vtraocular muscles that move the eyeball are
Theextra
Supe Rectus
b)
c) Medialpctus.
d)
)
Lcaten.cnacus
Supeio1 ehliae
Iateuiar
which
eLlae
(The muscles
moves the upper eyelid is Jeuala halptbee steuis
2
All the
a) All extraocular muscles are innervated byOcculompto
extra
nerve except
Predict Question
What is squint/strabismus ? Discuss
cause of medial and lateral squints.
he- Weakrox ky þovolys is gt a mucle causes sqirt/
Stoatimus - whch may e Concomutartt an cotaly tie.
is mo i itauHfon
Lonuomutant sajur ds torgenitel, thoe s-
movementno, deblopogid, In walyyhe sajuin-
rooeodis imitec, dialopo- o are esevt|
20
indocosneal umbus Iry
Rpil
anglu meuo cho be
PrHeuo
Rssuascho mie omprHma
Hyalord
membrane Canal oflee
yalsid
Lens
ophtdukc Poteuo
Com partm ont
Oph
nerve
Fovea cenkalul
EYE
Eye
is the organ of vísual.
is located int the anterior
b) 1/3rd of the
2
wall of the eyeball is conmposcd of
The walle
A
xanponan
The middle or vascular layer media of the eyeball.
called uveal tract form behind forwards comprises
Louefd__ ciliay bms&_
i. The iris
contains variable amounts of
different color of the eyes in Jgameut
different
which is responsible for the
has an aperture, the
Yaces.
Dubil_ in the centre.
contains two smooth musclés which regulate she size of the pupil viz.
ipstridoK þapilbe& alouor popillce
c)The inner or nervous layer comprises an outer layer and inner
photosensitive Sena layer. The neural layer contains two types of
receptors:
2. On opthalmoscopic examination the retinal presents following features
a) optic disc
i. is situated slightly pmedial to the posterior pole,
LmeL and is therefore
ii. us devoid of Dhoo naand
insensitive to light (blindspot)
b) macula lutea
. is a Pals oval area located at the posterior pole ofthe eye.
i. is 3 mm madial to th optic disc.
Predict Question
anatomical basis.
What is papillaedema ? Giveits
d18The corgeslfon obtic dise ia orcwed by inover
inroobndapiouecue, to, awy lcrod o
oheod
heod
chovdU
fumu
dwy, brouh- P )
21
Supuuos Sajittal8inu
i p e u p G n a l t o m e l i n v e e n
t Tolaa)
sfeufiea
Juesebra
e r e b r a l vtn
V u n
intesnal
Great Cexeb radve
in.
-raght Bind
Sph eneporigtd endefainw
-
Conylu
iewiroraftemvti
Cawemoy
n
vuin (o kabóe)
Sufuuuy
Tresver iny
Ineud
Petal S1gmoid in t
iny -
intevnasyugulc uet n
DURAL VENOUS SINUSES
and
Da m0tfet layers of meni nges lined bychdlballium
The
two main stic featurçs of dural venous sinhses are
2 a) absence of
mculan coat is the wall.
b) absence of Lalos.. in the lumen.
The importanti functions of dural venous sinuses are to drain:
1D the venous blood from bnalh andMonivges
a)
hthe_Gtbscpll_via the arachnoid granulations.
sinuses are:
The paired dural
Laveunnu4Tnpo
SuplUK_ xMk)
edenb anoid
ansve shdaopaniefw
sinuses are
.Theunpaired dural
siboui Saqotal b)Teg Seggiad
U0
A CAVERNOUS SICUs
d)
d cuital..
t h e cavenous sinuses are paired sinuses located on each side of the body of3phenaid bore
a r e so called because thier cavities are divided into number of spaces/ caverns by
aheCuae_
2. The structures passing through the
cavernous sinus are
tehal (lonalihrtery. b) HcuauE nerve.
3. The structure passing through the lateral wall of the cavernpus sinus are:
22
L a c i a l
r e g u e
N a u i l rn e s u e
h o n t a l r e rv e
ST
HoloYrOo
S ed o r y r o o t
T
AE
PE in Proeré1a
Tr9 on 2 a l v e o i c s A
Supeuoy d e n t e l
Ner Dle
Pincsu
BucLal (
Auriuulo
ungd
+empurd
nerve
C h o r d a
+ u m p a u
M y l h y
rve
o i d d
-Mene rexv
ihfuuo
auweola)
TRIGEMINAL NERVE
Trigeminal nerve
is the
b) isaa mixed nerve havil
Jengest of all cranial
nerves.
arise from the
a
large
ventral aspect ofSenso yroot and asmal. mator
ch
root which
has three division viz. the
division
viz.9bhalmic,
thalamic and maxillary nerves contain only maxi lla &
mandibulat.
nerve contains both
Se nsosy
as well as
fibers,
fibers, whereas mandibular
OPTHALMIC NERVE mofor fibers.
a) is the rst of the three
divides into three branches viz divisions of trigeminal nerve.
before entering into the orbit maxdcialley acugal& ntal
throuth9ubrlOsbil
innervates yebalLuahia
c)innervates olfissure
MAgoLlcauziis
anterior arts of OC
and
MAXILLARY NERVE id
V
Udi
B) 1, The maxillary nerve
a) is the eLnd of the three divisions of trigeminal uerve.
b)leaves cranial cavity through foramen netepdum. to enter into the
heopoalgdive fossa, passes throughJm-bif_ fissure to enter
the orbit ás n b u cbihervewhichehergosthe face through the
iNADbiaN_foramen.
IC] MANDIBULAR NERVE
1. a) isthe
b)
-thisd
divides into m o t o l .
division of the trigeminal nerve.
(predominantly motor) and posterior
(predominantly sensory) divisions.
2. The branches ofmandibular nerve are:
a) from the trunk
imenenaial brahi Neue:tommdelbhowamd
b from th anterior division
i a 9 n e i Nenwe i. Deep tempoal erve
ii. ato pgain N. iv._ baga morie which is
motor except buecaul_nerve sensory).
(All the branches of anterior division are
c) from the posterior division
i. Huuicuotembn.i. noeijateups
linqual alenby rove
nerve which is motor)
are sensry except
(All the branches of posterior division
Predict Question
block?
What is the anatomical basis of inferior alveolar nerve
to e i n
pant so yeued s t y supeu
h-haunetheheJmo the mounci bug a e n , besrg verhuae y
eo lc r e w bloek
while eyogmirg e mtefo aueolaw
Uquou w
þmsrey may eulemoxla
4.oeolb is urgoukedso janaucu nele a a tu
PooHd glad Ond d a e
23
Taoprl
Toal
N
upo tutta
Muginal
FACIALNERVE
T h ef a c i a l n e r v e
isa
ed nerve.
a) nerve of the
is the
b) arises from ontdmudullaty_
arises
branchial arch.
and aassmall
root and Junction by two rots, a large medlal matr
laterallySersoq root called nervus intermedius.
the crania! cavity by
d)leavesthe ves þassing through ale
Facial nerve supplies mautid foramen.
fibers to the muscles of
) motor
motorf
3.
The branches of facial nerve are
a) in the facial canal
iGueehen toso
ii. en DStaedius
Chlonm tmpbQu Nee
b) at its exit from the stylomastoid foramen
i rosreHiD auH*CAOn_nene.
i Nenue o prnsteHKN bala oldisastnc
.
111. Neug4o atlohuoi
c)within the parotid gland (termiHal brahches)
i. Tompona
i.ymai
ii. Blleal
ivMandibulan
V.CoMuiCOL
Predict Question
merate its cardinal features.
What is Bell's paisy ? Enu
24
fade
Newt
w Suroli
ngheov R
Olic
Sett flet
C.
Tenul
Tonaue
Coue didihulion
gomophygeal.
GLOSSOPHARYNGEAL NERVE
Glossopharyngeal nervve
So
a ) I ss oc a l l e led because it mainly supplies ensosy_innenuahon omue
& Phaynax
a x CanaB nerve.
bis lateral to tne
arises from aspect of the Latehal copeit madula
ventral
e)
leaves the
cranial cavity by passing through_qutouix
nerve supplies
paza Tupubn
Glossopharyngeal
2
motor fibers to lophauu qeDus muscle
a)
scretomotor fibers to the Fauoiia gland.
b)
c)tastefibers
to the
pTOstexui 1t lorgue
bhsnxtunis_and
and
What is the
anatomical basis of the gag-reflex?
chwotoused by elevodfon
Hha-I is oo bowtectie lecled with
polote cnd coatauchion Þhoyveo muwcle
asosatd ewnim ond goggi n ospord toshimlus
m w memboue ooophoiy hx
Ib c w when pkuunx, tonails, poosfouo1 þauu af fog
such a
bkjeuke stuhos eko
one touched buntdmöl rovw and
phouurgal
Aftoent Wrb puovided by alato
eoen Wmb by Vogus T
25