Post on 14-Apr-2018
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Development of tongue
1ST
Arch 2-4th
Arch 4th Arch2 lateral and
1 medial
lingual
swelling
Copula/
Hypobanchi
al Eminence
Epiglottal
Swelling
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Anterior
2/3rd
Posterior1/3rd
Posteriorpart of
tongue and
epiglottis
Tongue
DEVELOPM
ENTOF
TON
GUE
2 Lateral
1 Medial lingual
swelling
Copula
Epiglottal
Swelling
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SENSORY INNERVATION OF TONGUE
1st Arch Mandibulardivision ofTrigeminal Nerve
Anterior2/3rd
3rd Arch GlossopharyngealNervePosterior
1/3rd
4th ArchSuperiorlaryngealbranch of
Vagus nerve
Posterior partof tongue and
epiglottis
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OTHER INNERVATIONSOFTONGUE
Supplied by:Hypoglossal Nerve
Derived from:
Myoblasts in occipital somitesAnterior2/3rd Chorda tympani
(facial Nerve)
Muscular Nerve SupplySpecial
Sensory Innervation
Posterior1/3rd
GlossopharhyngealNerve
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Tongue not freed from
floor of mouth.
Extensive cell
degeneration occurs.
Frenulum anchorstongue to floor of
mouth.
Abnormalities of the tongue
Tongue-tie (Ankyloglossia)
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FACIAL PROMINENCES
Frontonasal
Maxillary
Mandibular
Nasal
Placodes
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Formation of Nasal Pit, Medial &
Lateral Nasal Prominence
FormingNasal Pits
Invagination ofnasal placodes
Ridge of tissue
around each pit:Nasal
Prominence
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DEVELOPMENT OF UPPER LIP
Upper lip formed by
2 Medial Nasal &2Maxillary Prominences
Cleft is lost
The two fuse
Medial growth ofmaxillaryprominences
Pushes medial nasalprominences
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NasolacrimalGroove
Site
Fate
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Fate OF Nasolacrimal Groove
Nasolacrimal ductLacrimal Sac
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FATE OF NASOLACRIMAL GROOVE
Upper end widens
Canalizes
Solid corddetachesfromoverlyingectoderm
NasolacrimalDuct
LacrimalSac
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What is
she
talkingabout??
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FORMATION OF NOSE
Frontal NasalProminence Bridge
Medial Nasal
Prominence Crest&Tip
Lateral Nasal
Prominence Sides
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DEVELOPMENTOF NASAL CAVITIES
Rupturing Of OronasalMembrane
Primitive Choana
Oronasal MembraneSeparates pits from oral
cavity
Deepening Of the nasal pits
During the 6th week
Formation of secondary palate& Nasal Chambers
Definitive Choana at the junction of
nasal cavity& pharynx
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INTERMAXILLARY SEGMENT: PRIMARY PALATE
Components
Labial UpperJaw
Palatal
Philtrum OfUpper Lip 4 Incisors PrimaryPalate
S d
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Incisive foramen
At the fusion of Pri. & Sec.Plates
Fuse in a horizontalposition
Secondary Palate
Palatine Shelves
Outgrowths from maxillaryprominence
Secondary
Palate
Development
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(Surah-AtTin 4)
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Cause Of Facial Clefts Anterior To
Incisive Foramina
Lack Of Fusion ofMaxillary
Prominence withMedial Nasal
Prominence On 1 oron both sides
PARTIAL COMPLETE
Normal
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INCOMPLETE CLEFT LIP: UNILATERAL CLEFT
LIP EXTENDINGINTOTHENOSE
Partial Non-Fusion
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BILATERAL CLEFT INVOLVING LIP & THE JAW
Complete lack of fusion on bothsides
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CLEFT LIP, CLEFT JAW & CLEFT PALATE
Complete non-fusion
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ISOLATED CLEFT PALATE
Lack Of Fusion Posterior Tothe Incisive Foramina
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OBLIQUE FACIAL CLEFT
Failure of maxillary prominence to mergewith corresponding lateral nasal
prominence
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(At-Tagabun-3)
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Cant wait
to start
talking!!!
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