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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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