Tongue

TONGUE

Q. 1

Intrinsic muscles of the tongue are derived from?

 A

2 nd branchial cleft

 B

Pharyngeal arch mesenchyme

 C

Occipital somites

 D

Cervical somites

Q. 1

Intrinsic muscles of the tongue are derived from?

 A

2 nd branchial cleft

 B

Pharyngeal arch mesenchyme

 C

Occipital somites

 D

Cervical somites

Ans. C

Explanation:

Most of the tongue muscles are derived from myoblasts that migrate from the occipital somites.

The tongue’s embryonic orgin is derived from first 4 pharyngeal arches contributing different components.

Anterior 2/3 or body of tongue: is derived from 3 lingual buds- the median tongue bud (tuberculum impar) and 2 lateral lingual swellings developing at each side of the median tongue bud. (Taste sensation to the anterior 2/3rd of the tongue is provided by the chorda tympani branch of the facial nerve).

Post 1/3 or root of the tongue: is formed from two median elevations;


Q. 2

Tongue muscle develop from

 A

Mesoderm of pharyngeal pouch

 B

Occipital Myotome

 C

Somites

 D

Endoderm of pharyngeal pouch

Q. 2

Tongue muscle develop from

 A

Mesoderm of pharyngeal pouch

 B

Occipital Myotome

 C

Somites

 D

Endoderm of pharyngeal pouch

Ans. B

Explanation:

B i.e. Occipital Myotome


Q. 3

The Glossopharyngeal nerve supplies the posterior part of the tongue because it develops from the

 A

Hyoid arch

 B

Tuberculum impar

 C

Mandibular arch

 D

Hypobranchial eminence

Q. 3

The Glossopharyngeal nerve supplies the posterior part of the tongue because it develops from the

 A

Hyoid arch

 B

Tuberculum impar

 C

Mandibular arch

 D

Hypobranchial eminence

Ans. D

Explanation:

D i.e. Hypobranchial eminence

–   Tongue muscles originate from myoblast of occipital somitesQ. Thus tongue musculature is innervated by hypoglossal nerve.

–  Glossopharyngeal (9th) nerve supplies posterior (1/3) part of tongue because it develops from hypobrachial eminence (copula).

Parathyroid glands develop from 4th (superior) & 3rd (inferior para thyroid glands) pharyngeal endodermal pouch.


Q. 4

Which of the following swelling moves on protrusion of tongue –

 A

Thyroglossal cyst

 B

Branchial cyst

 C

Ranula

 D

Cyst in hyoid bone

Q. 4

Which of the following swelling moves on protrusion of tongue –

 A

Thyroglossal cyst

 B

Branchial cyst

 C

Ranula

 D

Cyst in hyoid bone

Ans. A

Explanation:

Ans. is ‘a’ i.e., Thyroglossal cyst 


Q. 5

Tongue muscle which is not developed from occipital myotome ‑

 A

Styloglossus

 B

Hyoglossus

 C

Genioglossus

 D

Palatoglossus

Q. 5

Tongue muscle which is not developed from occipital myotome ‑

 A

Styloglossus

 B

Hyoglossus

 C

Genioglossus

 D

Palatoglossus

Ans. D

Explanation:

DEVELOPMENT OF THE TONGUE :‑

I. Epithelium

a)       Ant 2/3 — lingual swellings of 1st arch and tuberculum impar

b)     Post 1/3 — large dorsal part of hypobranchial eminence, Le. 3rd arch

c)       Posterior most part — small dorsal part of the hypobranchial eminence, i.e. 4th arch

II. Muscles

From occipital myotomes except palatoglossus which is derived from the 6th arch.


Q. 6

False regarding papillae of tongue ‑

 A

Fungiform papillae at tip

 B

Circumvallate papillae at base

 C

Foliate papillae at back edge

 D

Filiform papillae have taste buds at tip

Q. 6

False regarding papillae of tongue ‑

 A

Fungiform papillae at tip

 B

Circumvallate papillae at base

 C

Foliate papillae at back edge

 D

Filiform papillae have taste buds at tip

Ans. D

Explanation:

Ans. is ‘d’ i.e., Filiform papillae have taste buds at tip

In tongue, taste buds are grouped in structures called papillae. Taste buds are located in the walls of papillae. There are three types of papillae :-

i) Fungiform papillae :- Are especially numerous near the tip and the margins of the tongue.

ii) Circumvallate (Vallate) papillae :- These are the largest papillae and are distributed to a V-shaped region near the base of tongue.

iii) Foliate papillae :- Confined to the back edge of the tongue.

Besides these three types of papillae, there is also a fourth type, the filiform papillae but these have no taste buds.


Q. 7

 Identify the structure represented as number “5” in the picture below?

 A

Hyoid arch.

 B

Tuberculum impar.

 C

Mandibular arch.

 D

Hypobranchial eminence.

Q. 7

 Identify the structure represented as number “5” in the picture below?

 A

Hyoid arch.

 B

Tuberculum impar.

 C

Mandibular arch.

 D

Hypobranchial eminence.

Ans. D

Explanation:

Ans:D.)Hypobranchial Eminence.

The  structure marked as number  “5” (Red arrow) in the picture above represents the Hypobranchial Eminence.

  • The hypopharyngeal eminence or hypobranchial eminence is a midline swelling of the third and fourth pharyngeal arches, in the development of the tongue.
  • It appears in the fifth and sixth weeks of embryogenesis.
  • The hypopharyngeal eminence forms mostly from the endoderm of the third pharyngeal arch and only partially from the fourth pharyngeal arch.
  • It quickly grows to cover the copula formed earlier from the second pharyngeal arch, and will form the posterior one third of the tongue.


Leave a Reply

%d bloggers like this:
Malcare WordPress Security