Palate

PALATE

Q. 1

The sensory supply of the palate is through all of the following, EXCEPT?

 A

Facial nerve

 B

Hypoglossal nerve

 C

Glossopharyngeal nerve

 D

Maxillary division of trigeminal nerve

Q. 1

The sensory supply of the palate is through all of the following, EXCEPT?

 A

Facial nerve

 B

Hypoglossal nerve

 C

Glossopharyngeal nerve

 D

Maxillary division of trigeminal nerve

Ans. B

Explanation:

The muscles of the soft palate are the tensor veli palatini, the levator veli palatini, the palatoglossus, the palatopharyngeus, and the musculus uvulae.

  • The greater and lesser palatine nerves from the maxillary division of the trigeminal nerve enter the palate through the greater and lesser palatine foramina.
  • The nasopalatine nerve a branch of the maxillary nerve, enters the front of the hard palate through the incisive foramen.
  • The glossopharyngeal nerve also supplies the soft palate.
  • Facial nerve supplies submandibular and sublingual salivary parasympathetic glands, lacrimal gland, and glands of nose and palate.

Q. 2

Which of the following statement about the nerve supply of palate is NOT TRUE?

 A

Pharyngeal plexus supply muscles of soft palate

 B

Tensor veli palatini is supplied by mandibular nerve

 C

Anterior branch of pterygopalatine ganglion supplies soft palate

 D

Middle and posterior lesser palatine nerves supply soft palate and tonsil

Q. 2

Which of the following statement about the nerve supply of palate is NOT TRUE?

 A

Pharyngeal plexus supply muscles of soft palate

 B

Tensor veli palatini is supplied by mandibular nerve

 C

Anterior branch of pterygopalatine ganglion supplies soft palate

 D

Middle and posterior lesser palatine nerves supply soft palate and tonsil

Ans. C

Explanation:

“Greater or anterior palatine branches of pterygopalatine ganglion supplies hard palate and lateral wall of the nose while the lesser or middle and posterior palatine nerve supply the soft palate and tonsils”.

  • All the muscles of the soft palate except tensor veli palatini are supplied by pharyngeal plexus (fibers of the plexus are derived from the cranial part of the accessory nerve through the vagus nerve)
  • Tensor veli palatini is supplied by mandibular nerve.

Q. 3

All of the following muscles of tongue are supplied by hypoglossal nerve, EXCEPT?

 A

Palatoglossus

 B

Genioglossus

 C

Geniohyoid

 D

None of the above

Q. 3

All of the following muscles of tongue are supplied by hypoglossal nerve, EXCEPT?

 A

Palatoglossus

 B

Genioglossus

 C

Geniohyoid

 D

None of the above

Ans. A

Explanation:

The muscles of the tongue, with the exception of palatoglossus, are supplied by the hypoglossal nerve. Palatoglossus is supplied via the pharyngeal plexus.


Q. 4

All muscles of the palate are supplied by pharyngeal plexus, EXCEPT?

 A

Tensor veli palatine

 B

Palatoglossus

 C

Palatopharyngeus

 D

None of the above

Q. 4

All muscles of the palate are supplied by pharyngeal plexus, EXCEPT?

 A

Tensor veli palatine

 B

Palatoglossus

 C

Palatopharyngeus

 D

None of the above

Ans. A

Explanation:

With the exception of tensor veli palatini, which is supplied by the motor branch of the mandibular division of the trigeminal through the nerve to medial pterygoid, the muscles are supplied by the cranial part of the accessory nerve via the pharyngeal plexus.


Q. 5

Cranial part of accessory nerve supplies all palatal muscles, EXCEPT?

 A

Palatoglossus

 B

Palato pharyngeus

 C

Tensor veli palatini

 D

Tensor veli tympani

Q. 5

Cranial part of accessory nerve supplies all palatal muscles, EXCEPT?

 A

Palatoglossus

 B

Palato pharyngeus

 C

Tensor veli palatini

 D

Tensor veli tympani

Ans. C

Explanation:

The cranial root of the accessory nerve is smaller than the spinal root. It exits the skull through the jugular foramen and unites for a short distance with the spinal root. Its fibers innervate the pharyngeal and palatal muscles, except tensor veli palatini. 


Q. 6

Primary and secondary palates are divided by

 A

Greater palatine foramen

 B

Canine teeth

 C

Alveolar arch

 D

Incisive foramen

Q. 6

Primary and secondary palates are divided by

 A

Greater palatine foramen

 B

Canine teeth

 C

Alveolar arch

 D

Incisive foramen

Ans. D

Explanation:

D. i.e. Incisive foramen

The incisive foramen is dividing landmark between the primary & secondary palateQ; and anterior & posterior cleft deformities


Q. 7

Sensory fibres from the taste buds in the bard and soft palate travel along:

 A

Trigeminal nerve

 B

Facial nerve

 C

Glossopharynegeal nerve

 D

Vagus nerve

Q. 7

Sensory fibres from the taste buds in the bard and soft palate travel along:

 A

Trigeminal nerve

 B

Facial nerve

 C

Glossopharynegeal nerve

 D

Vagus nerve

Ans. B

Explanation:

B i.e. Facial nerve


Q. 8

Muscle which helps to open Eustachian tube while sneezing:

March 2005, September 2010

 A

Tensor veli palatini

 B

Levator veli palatini

 C

None of the.above

 D

Both A and B

Q. 8

Muscle which helps to open Eustachian tube while sneezing:

March 2005, September 2010

 A

Tensor veli palatini

 B

Levator veli palatini

 C

None of the.above

 D

Both A and B

Ans. D

Explanation:

Ans. D: Both A and B

Pharyngotympanic (Auditory) tube is 4 cm long, consists of two parts:

  • Bony part forms posterior and lateral one third of the tube (12 cm long)
  • Cartilaginous part forms the anterior and medial two third (25 cm long)
  • Connects the middle ear with the nasopharynx
  • Equalizes pressure on both sides of the tympanic membrane
  • Usually closed to prevent entrance of particles from the nose
  • Muscles that open auditory tube while swallowing, yawning and sneezing are levator veli palatini and tensor veli palatini

Q. 9

Tongue muscle which is not developed from occipital myotome ‑

 A

Styloglossus

 B

Hyoglossus

 C

Genioglossus

 D

Palatoglossus

Q. 9

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. 10

Passavant ridge ‑

 A

Superior constrictor and palatopharyngeus

 B

Inferior constrictor and palatopharyngeus

 C

Superior constrictor and palatoglossus

 D

Inferior constrictor and palatoglossus

Q. 10

Passavant ridge ‑

 A

Superior constrictor and palatopharyngeus

 B

Inferior constrictor and palatopharyngeus

 C

Superior constrictor and palatoglossus

 D

Inferior constrictor and palatoglossus

Ans. A

Explanation:

 

Passavant ridge

  • Near the superior margin of pharynx, a few fibres of superior constrictor blend with a band of muscle fibres belonging to the palatopharyngeus muscle.
  • These fused fibres form a band or ring around the posterior wall and sidewalls of the nasopharyngeal isthumus.
  • When the soft palate is elevated this muscle band appears as a ridge is known as passavant’s ridge.


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