DEVELOPMENT OF THE TONGUE Flashcards
the tongue comes from ——pharyngeal arches
1-4th
line of fusion of the anterior 2/3 with the posterior 1/3 is indicated by a —-shaped groove called the—-
V-
terminalis sulcus
ANTERIOR 2/3 Of The Tongue
- 2 lateral——(aka ——-) appear—— to the tuberculum impar
- they overgrow the——- ,—— , and become the anterior 2/3 of the tongue
lingual swellings
distal tongue buds
distal
tuberculum impar
Median—— swelling called ——develops from the floor of the—— just cranial to the——
By the—- week ——
triangular
tuberculum impar
primitive pharynx
foramen caecum
end
4
DORSAL SURFACE OF THE TONGUE
- the line of fusion of the——- in the—— plane forms the——
- tuberculum impar forms—— part of the adult tongue
- mucous Membrane covering the anterior 2/3 of the tongue Is from—— pharyngeal arch, it’s therefore innervated by the——
2 lingual swellings
median
median sulcus on the dorsal tongue
no recognizable
1st
mandibular nerve of trigeminal
POSTERIOR 1/3 Of The Tongue
- a second large—— swelling called———(aka——) develops caudal to the—— (extends through the regions of the—— arch)
- it soon divides into large—- and small—— part
- ——of the tongue including the——- develops from—— part of the swelling
median
hypobranchial eminence ; copula of His
tuberculum impar
2nd-4th
cranial; caudal
Posterior part ;circumvallate papillae ;
-mucous Membrane of the posterior 1/3 of the tongue including ——-Is from—- pharyngeal arch, it’s therefore innervated by the—— nerve
circumvallate papillae ; 3rd
glossopharyngeal
POSTERIOR MOST
- posteriormost part of the tongue and——- develop from the—— part of the_____ (—-arch)
- mucous Membrane of the posteriormost part of the tongue including the—— Is from—- pharyngeal arch, it’s therefore innervated by the ——-nerve
epiglottis
caudal; hypobrachial eminence; 4th
epiglottis; 4th
superior laryngeal
During these sequence of events, the—- arch mesoderm grows over the mesoderm of the—— arch and fuses with the mesoderm of the—— arch. Thus,—- arch gets buried underneath the—- arch and thereby gets excluded from the tongue development
third
second
first
second
third
MUSCLE OF THE TONGUE
——-migrate with the—— nerve to the———-(aka ——-) to form the muscles of the tongue
occipital myotomes
hypoglossal
stomodeum
primitive mouth
At birth both the—- and—— parts of the tongue are located within the——;
-later the——- of tongue descends into the—— by age ——and forms its——.
anterior; posterior; oral cavity
posterior third; oropharynx;4; anterior wall
The beer is tasted at the——- part of the tongue which is supplied by the——— nerve. For this reason, that nerve is also called ‘——-nerve.’
posterior most; internal laryngeal
beer drinker’s
-Mucous membrane of the tongue is derived from the—— of the primitive —-gut.
endoderm
fore
Taste buds are formed in relation to the ——-of nerves carrying taste sensations.
terminal branches
Fibroareolar tissue that—- the—— develops from——-
binds
Tongue muscles
mesenchyme of the pharyngeal arches.
taste buds of anterior two-third of the tongue=—— arches= ——nerve of——
second
Chorda tympani
CN7
A sulcus called—— sulcus develops on either side of —— and separates the ——-from the——
linguogingival
The primordial tongue
developing tongue
floor of the mouth.
Aglossia:
——-of tongue
-rare or common???
-occurs due to——-
absence
Rare
complete agenesis of tongue primordia
Hemiglossia:
——-tongue
-occurs when——- fails to develop
half
one of the lingual swelling
Ankyloglossia Superior:
-tongue is attached to the——-
palate
Bifid tongue:
-when—— portion of tongue—-
-caused by failure of—— to——
———always have bifid tongues
anterior; splits into 2
lingual swellings; fuse
snakes
——-of tongue and hypertrophy of the——-:
-It is a characteristic of infants with——-
Fissuring
lingual papillae
Down’s syndrome.
Development of Palate
- two parts: —— palate and ——- palate.
- P palate is from the—— process and——- palate is from the ———processes.
- begins in the sixth week and completes by the end of the ——-week.
primary
secondary
frontonasal
secondary
maxillary
twelfth
Development of Primary Palate
- formed by fusion of two ———processes of the frontonasal process
- The fusion of these processes (at a—— level) forms a——-shaped mass of mesenchyme opposite——- carrying four—— teeth called primary palate.
- It ossifies to form——-.
Medial
deeper; wedge
upper jaw
incisor
premaxilla
palatine shelves are shelf like outgrowths from—- aspect of—- process
inner
maxillary
-secondary palate is formed by fusion of the——
palatine shelves
Palatine shelves :
Appear in week—-?
Assume final position by week—-?
6
7/8
The secondary palate is the primordium of most of—- part and whole of—- part of the adult palate.
hard
soft
Once the palatine shelves are fused the ossification extends from the—- and—— bones into these shelves to form the hard palate.
maxillae
palatine
Development of Permanent Palate
- Anteriorly the—- palate fuses with the—— palate by a—–shaped suture and each limb of it passes between the—— and—— teeth.
- Junction between the—- and——- palates is represented in adults by ——- into which opens——-
secondary; primary; Y
lateral incisor
canine
primitive; secondary
incisive fossa
two incisive foramina.
The nasal septum grows down and joins—- aspect of anterior ——of the—— palate in the midline.
superior; three-fourth
hard
The fusion between nasal septum and secondary palate begins—- during the___ week and is completed—- by the—— week.
anteriorly
ninth
posteriorly
twelfth
Incomplete or partial cleft palate
The follow-ing types may occur.
-Bifid uvula:
Cleft involving——-.
Cleft of the soft palate:
Involving—- and part of the——
-Cleft of the soft palate:
Involving—-, whole of the——, and extends into the——-
only uvula
uvula; soft palate
uvula; soft palate
hard palate.
Unilateral complete cleft palate
occurs if—— process on one side does not fuse with the——-.
It is always associated with the—- on the—- side.
maxillary; premaxilla
cleft lip; same
Bilateral complete cleft palate
occurs if ——-fail to fuse with the——.
In this type,—— palate is divided into two equal halves by a median cleft with an anterior V-shaped cleft separating the____ completely.
both the maxillary processes
premaxilla
secondary
premaxilla
Development of taste buds starts in __ ti ___ week
Nerves from taste buds begin connecting to the brain. In ___ to ___ week
Many taste buds are able to transmit taste signals to the brain by __ week
Your baby can taste sweet, sour, and bitter flavors by ____
Reactions to salty foods come later, usually by___
11-13
13-15
20
Birth
6month
