Development Of Tongue

Question 1

The adult tongue is divided into two parts, which are

Develops in the floor of the developing ———, from ——— pharyngeal arches..

Answer 1

The adult tongue is divided into two parts, which are
The anterior2/3rd
Posterior1/3rd.

Develops in the floor of the developing mouth (stomatodeum) from 1st,2nd, 3rd and 4th pharyngeal arches..

Question 2

Dorsal surface of tongue
The line of fusion of the anterior two-third and posterior one-third of the
tongue is indicated by a V- shaped groove called the ————.

Answer 2

Dorsal surface of tongue
The line of fusion of the anterior two-third and posterior one-third of the
tongue is indicated by a V- shaped groove called the sulcus terminalis.

Question 3

Dorsal surface of tongue
The line of fusion of two lingual swellings in the median plane forms ——— on the dorsal surface of the tongue.
The tuberculum impar does not form any recognizable part of the adult tongue.
Since mucous membrane covering the anterior two-third of the tongue develops from the —— pharyngeal arch,it is innervated by ——— nerve

Answer 3

Dorsal surface of tongue
The line of fusion of two lingual swellings in the median plane forms median sulcus on the dorsal surface of the tongue.
The tuberculum impar does not form any recognizable part of the adult tongue.
Since mucous membrane covering the anterior two-third of the tongue develops from the first pharyngeal arch,it is innervated by mandibular branch of trigeminal nerve the nerve of first arch

Question 4

———- myotomes migrate with the ——- nerve to the stomatodeum forming the muscles of the tongue

Answer 4

Occipital myotomes migrate with the hypoglossal nerve to the stomatodeum forming the muscles of the tongue

Question 5

The posterior 1/3rd of the tongue including ——— papillae develops from ——— part of
————.
The mucous membrane of the posterior’ 1/3rd of tongue (including —— papillae) develops from the ——
pharyngeal arch,it is supplied by ——- nerve

Answer 5

The posterior 1/3rd of the tongue including circumvallate papillae develops from cranial part of
hypobranchial eminence.
The mucous membrane of the posterior’ 1/3rd of tongue (including vallate papillae) develops from the third
pharyngeal arch,it is supplied by glossopharyngeal nerve the nerve of third arch.

Question 6

The 2 lingual swellings overgrow the ————, and fuse becoming
the ———

Answer 6

The 2 lingual swellings overgrow the tuberculum impar, and fuse becoming
the anterior 2 / 3

Question 7

The 2 lingual swellings overgrow the ————, and fuse becoming
the ———

Answer 7

The 2 lingual swellings overgrow the tuberculum impar, and fuse becoming
the anterior 2 / 3

Question 8

Anterior 2/3rd of the tongue

At the end of week — ,median swelling called ——— develops in the floor of primitive pharynx,just cranial
to ———.
2 lateral ——- swellings appear distal to the tuberculum impar.

Answer 8

Anterior 2/3rd of the tongue

At the end of week 4 ,median swelling called tuberculum impar develops in the floor of primitive pharynx,just cranial
to foramen cecum.
2 lateral lingual swellings appear distal to the tuberculum impar.

Question 9

Posterior 1/3rd of the tongue

The posterior most part of the tongue
and epiglottis develop from the —— part of the ——— (—th Arch).
Since the mucous membrane of the
posterior most part of tongue and epiglottis develop from —— pharyngeal arch,it is supplied by the——- nerve.

Answer 9

Posterior 1/3rd of the tongue

The posterior most part of the tongue
and epiglottis develop from the caudal part of the hypobranchial eminence (4th Arch).
Since the mucous membrane of the
posterior most part of tongue and epiglottis develop from fourth pharyngeal arch,it is supplied by the superior laryngeal nerve the nerve of the fourth arch.

Question 10

A second large median swelling called ——— (also called ——- ) develops caudal to ———.
from —— pharyngeal arches
The median swelling soon subdivides into large ———part and small ——— part

Answer 10

A second large median swelling called hypobranchial eminence (Copula of His) develops caudal to tubercular impar (2nd,3rd,&4th pharyngeal arches).
The hypobranchial eminence
soon subdivides into large cranial
part and small caudal part

Question 11

ClinicalCorrelates
1.———:In this condition,the anterior portion of the tongue splits into two parts .

Answer 11

ClinicalCorrelates
1.Bifidtongue:In this condition,the anterior portion of the tongue splits into two parts .

Question 12

ClinicalCorrelates
1.Bifidtongue:In this condition,the anterior portion of the tongue splits into two parts .It is caused by failure of ————

Answer 12

ClinicalCorrelates
1.Bifidtongue:In this condition,the anterior portion of the tongue splits into two parts .It is caused by failure of fusion of two lingual swellings (.The
tongue of snakes is always bifid.)

Question 13

ClinicalCorrelates
1.——— : (absence of tongue)It is very rare and occurs due to complete agenesis of tongue primordia.

Answer 13

ClinicalCorrelates
1.Aglossia(absence of tongue):It is very rare and occurs due to complete agenesis of tongue primordia.

Question 14

ClinicalCorrelates

2. ———- : (half tongue) It occurs if one of the lingual swelling fails to develop.

Answer 14

ClinicalCorrelates

2. Hemiglossia (half tongue): It occurs if one of the lingual swelling fails to develop.

Question 15

ClinicalCorrelates

3 .———-:Tongue is too small.

Answer 15

ClinicalCorrelates

3 .Microglossia:Tongue is too small.

Question 16

ClinicalCorrelates

3 .———-:Tongue is too small.

Answer 16

ClinicalCorrelates

3 .Microglossia:Tongue is too small.

Question 17

ClinicalCorrelates

3 .———-:Tongue is too small.

Answer 17

ClinicalCorrelates

3 .Microglossia:Tongue is too small.

Question 18

ClinicalCorrelates

4 .———:Tongue is too large.

Answer 18

ClinicalCorrelates

4 .Macroglossia:Tongue is too large.

Question 19

ClinicalCorrelates

5——— : (ankyloglossia) It occurs when frenulum of tongue extends to the tip of the tongue,thus preventing its protrusion and causing difficulty in speech

)

Answer 19

ClinicalCorrelates.
5 .Tongue tie(ankyloglossia):It occurs when frenulum of tongue extends to the tip of the tongue,thus preventing its protrusion and causing difficulty in speech
N.B.Occasionally the tongue may be adherent to the palate (ankyloglossia)

Question 20

Tongue tie is also called ———

Answer 20

ankyloglossia

Question 21

ankyloglossia is also called

Answer 21

Tongue tie