Development Of Face Flashcards
facial primoridia appear early in the—— week around——-
fourth
primoridal stomodeum
primoridal stomodeum is also known as——-??
Primitive mouth
5 facial primoridia appear as—— around the——.
List them
prominences
stomodeum
the single frontonasal prominence
the paired maxillary prominences
the paired mandibular prominences
Derivatives of the single frontonasal prominence
(Forehead, nose, nasal cavity,Philtrum of upper lip,nasal septum)
Derivatives of the paired maxillary prominences
(Lateral part of upper lip,upper part of cheek)
Derivatives of the paired mandibular prominences
(Chin, lower lip, lower parts of cheek)
the paired facial prominences are derivatives of the—— of pharyngeal arches
first pair
the prominences are produced mainly by the proliferation of—- that migrate from the——- and——- regions of the ——and into the pharyngeal arches during the—— week
neural crest cells
mesencephalon
rhombencephalon
neural folds
fourth
rhombencephalon also known as
Hind Brain
NASAL PLACODES appear by——
end of fourth week
NASAL PLACODES are 2 bilateral oval thickenings of the ——of the——- prominence
surface of the ectoderm
frontonasal
Nasal placodes are the primoridia for the——- and——
nose
nasal cavities
initially nasal placodes are—-, then they stretch to produce a—- in each placode by——-
- )——in the margins of the placode proliferates,producing——— shaped elevations called—— and—— prominences
- )depression between the 2 prominences is called ‘——-’ which is continuous with the stomodeum below
convex
flat depression
invaginating into the underlying mesoderm
horse-shoe
medial; lateral
nasal pit
__ is the primordia for nostrils
Nasal pits
———are the main source of the connective tissue components like muscles , cartilage, bone , and ligaments in the facial and oral region
mesenchymal cells
median nasal process thins out gradually to form ——-
primitive nasal septum.
globular processes of—— nasal processes fuse to form ——-
medial
philtrum of the upper lip.
the paired maxillary prominences form the——— boundaries of the——
primitive mouth
the paired mandibular prominences makeup the—— boundary of the——
caudal
primitive mouth
between the—- and—— weeks, the 2 medial nasal prominences merge with each other and with the maxillary and lateral nasal prominences
7th
8th
merging of medial nasal and maxillary prominences forms the continuity of—— and—— and seperation of—— from——
upper jaw
upper lip
nasal pit
stomodeum
The surface opening of stomodeum forms the ———. Lateral angles of it are formed by fusion of—— and—— processes.
oral fissure
maxillary
mandibular
sensory innervation of upper lip is derived from——- nerves.
maxillary
——-nerve supplies the parts gotten from the frontonasal prominence
opthalamic division of trigeminal
——and——- are first parts of the face to form
lower jaw
lower lip
Lower jaw and lip result from merging of the—— ends of the—— prominences in the—— plane
medial
mandibular
median
each lateral nasal prominence is seperated from the——- prominence by a cleft called——— that is lined with——- cells
maxillary
nasolacrimal groove
ectodermal
Thickening of the—— cells that line the nasolacrimal groove forms the——- that detaches from the—— and sink in the—- and gets recanalized to form the———
ectodermal
ectodermal cord
ectoderm
mesoderm
nasolacrimal duct
Upper end of nasolacrimal duct widens to form the——-
lacrimal sac.
The nasolacrimal duct becomes completely patent only ——-and communicates with ——caudally and with——- cephalically
after birth
nasal cavity
conjunctival sac
In adults the nasolacrimal duct runs from ———to——-
medial angle of the eye
inferior meatus of the nasal cavity
inferior meatus of the nasal cavity is an air passage located between ——and——-
inferior nasal concha
lateral nasal wall
——-forms the bridge of the nose.
——-form dorsum and tip of the nose.
———-form sides and alae of the nose.
The frontonasal process
Two fused medial nasal processes
Two lateral nasal processes
Intermaxillary Segment of Face is formed by——
fusion of the medial nasal processes
Intermaxillary Segment of Face has 3 components.
Labial component that forms the——-
-Upper jaw component that forms the ——-
-Palatal component that forms ———
philtrum of the upper lip
(alveolar process) that carries four incisor teeth.
triangular primary palate (also called premaxilla).
The primary palate develops from the——— and secondary palate develops from the——-
frontonasal process
maxillary processes.
Cleft lip commonly occurs in the—- lip
upper
Cleft lip occurs—— births and 60–80% of children involved are what gender??
1 in 1000
males.
cleft upper lip presents three varieties.List them
Unilateral cleft lip
Bilateral cleft lip
Central cleft lip
Central cleft lip is also called???
Hair lip
Unilateral cleft lip occurs due to failure of—-
Bilateral cleft lip occurs due to failure of——
hair lip occurs due to failure of——-
fusion of maxillary process with the medial nasal process of the same side
fusion of maxillary processes with the frontonasal process.
development of philtrum of the upper lip from the frontonasal process.
Lower cleft lip is Very—- and is due to——-
rare
the two mandibular processes may fail to fuse in the midline
oblique facial cleft aka ——?
orbitofacial fissure
oblique facial cleft. Rare or common
Rare
oblique facial cleft occurs when——
maxillary process fails to fuse with the lateral nasal process.
The orbitofacial fissure extends from—— to the——. Making the nasolacrimal duct——-
medial angle of the eye
upper lip.
exposed to the exterior.
oblique facial cleft. Usually bilateral or unilateral
Bilateral
Microstomia and macrostomia basically mean——?
small and large mouth
Initially the lateral angle of mouth extends——
- Subsequently in normal conditions the angles of mouth gradually shift—- by fusion between the—- and—— processes till normal adult position is reached.
much laterally close to auricle.
medially
maxillary; mandibular
The excessive fusion of the mandiblular and maxillary processes lead to ——
- arrest of this fusion leads to——.
microstomia
macrostomia
Most common cleft lip is——-
-Most rare cleft lip is——
unilateral cleft of upper lip
median cleft of lower lip
Commonest cause of cleft lip with or without cleft palate is——- which is a combination of—- and—— factors)
Multifactorial inheritance
genetic
environmental
Examples of first arch syndromes include ____ syndrome and _____ syndrome.
Treacher Collins
Pierre Robin
