Anatomy & Disease of Oral cavity & Pharynx

Question 1

embryonic derivative of oral cavity, pharynx, esophagus

Answer 1

foregut

Question 2

provides general sensation/ sensory to the ANTERIOR 2/3 of the tongue

Answer 2

lingual nerve branch of CN V3 branch of mandibular nerve CN V3, /TRIGEMINAL NERVE

Question 3

provides sensory & taste sensation to the POSTERIOR 1/3 of the tongue

Answer 3

Glossopharyngeal nerve

Question 4

special sensation/ TASTE to anterior 2/3 of the tongue

Answer 4

Chorda tympani branch of CN VII/CN 7/ Facial nerve

Question 5

all MOTOR Nerve supply of the tongue is innervated

Answer 5

hypoglossal nerve / CN 12

Question 6

-transverse the mandible and exits through the mental foramen
-provides sensation to the lower lip region

Answer 6

mental nerve

Question 6

4 paired intrinsic muscles of the tongue name by direction it travels

Answer 6

superior longitudinal
inferior longitudinal
Transverse
Vertical

Question 7

what are the extrinsic muscles of the tongue & its nerve supplies and function

Answer 7

1.genioglossus- protrusion & depression of tongue
2.Hyoglossus- depression and retraction of the tongue
3.Styloglossus- retraction & elevation of the tongue
4. Palataglossus- associated with soft palate and elevation of posterior tongue

ALL INTRINSIC MUSCLES /MUSCLES of the tongue are supplied by HYPOGLOSSAL NERVE/ CN XII Except for PALATOGLOSSUS supplied by CN X / Vagus Nerve

Question 8

all muscles of the tongue are supplied by hypoglossal nerve / CN XII except

and what its the nerve supply?

Answer 8

palatoglossus
Vagus nerve/ CN X

Question 9

Arterial supply of the tongue supply by

Answer 9

1. Lingual artery ( branch of ECA)
2. Tonsillar branch of CN VII/ Facial nerve

Question 10

venous drainage of the tongue supply by

Answer 10

lingual vein w/c empties to the IJV

Question 11

lymphatic drainage of the ANTERIOR 2/3 of tongue

Answer 11

submandibular and submental LN empties to deep cervical LN

Question 12

lymphatic drainage of the posterior third of the tongue

Answer 12

directly to deep cervical lymph node

Question 13

thyroid arises from ____ in the posterior part of tongue and migrates along the thyroglossal duct into the neck.

Failure of migration will result to what condition

Answer 13

foramen cecum

lingual thyroid

Question 14

what nerve is embedded in the parotid gland

Answer 14

Facial nerve

Question 14

submandibular duct is crossed by this nerve

Answer 14

lingual nerve

Question 15

oral cavity location

Answer 15

anterior to the
- soft palate,
-anterior to the tonsillar pillar
- base of the tongue

Question 16

3 Divisions of the pharynx are

Answer 16

1.Nasopharynx or Epipharynx- from base of the skull to level of the soft palate
2. Oropharynx or Mesopharynx- from oral cavity to the epiglottis
3. Laryngopharynx / Hypopharynx- below the epiglottis