Superficial Face

Question 1

Primordial Stomodeum

Answer 1

4th-8th week facial structures develop around this structure-FUTURE MOUTH

Question 2

Oropharyngeal Membrane

Answer 2

covered on outside by ectoderm and inside by endoderm….Separates forgut from amniotic cavity
-Ruptures ~4th week allowing amniotic fluid to pass into the pharynx

Question 3

Five Prominences-3 of which give rise to face

Answer 3

1. Single Frontonasal prominence
2. Paired Maxillary prominence
3. Paired Mandibular prominence

Question 4

Single Frontonasal Prominence

Answer 4

surrounds ventrolateral of forebrain

• frontal part=forehead
• nasal part=upper part of stomedium and nose

Question 5

Maxillary Prominence

Answer 5

made by NEURAL CREST CELLS…migrate from neural fold into maxillary prominence

• lateral boundary of stomedium
• give rise to maxilla and palatine shelves

Question 6

Mandibular Prominence

Answer 6

made by migrationof neural crest cells

• caudal boundary of stomedium
• mandible and lower lip

Question 7

Cleft Lip

Answer 7

Facial structures derived from the pharyngeal arches

-First arch and Second Arch

Question 8

First Arch

Answer 8

-Muscles of mastication -Mylohyoid m
-Anterior belly digastric -tensor tympani
-tensor veli palatini
TRIGEMINAL NERVE IS THE NERVE of 1st arch

Question 9

Second Arch

Answer 9

-Muscles of facial expression -stylohyoid
-posterior belly of digastric -hyoid bone
FACIAL NERVE IS THE NERVE of 2nd arch

Question 10

Supraorbital Nerve

Answer 10

Opthalmic division of CN V

-lateral forhead and upper eyelid

Question 11

Supratrochlear Nerve

Answer 11

Opthalmic division of CN V

-medial forehead and upper eyelid

Question 12

Infratrochlear Nerve

Answer 12

Opthalmic division of CN V

-medial part of eye and root of nose

Question 13

Infraorbital Nerve

Answer 13

Maxillary division of CN V

• upper lip, lower eyelid, part of zygomatic and nose
• skin to lower eyelid, cheek, lateral nose and upper lip and temporal fossa

Question 14

Mental Nerve

Answer 14

Mandibular Division of CN V

-skin of chin and lower lip

Question 15

Buccal Nerve

Answer 15

Mandibular Division of CN V

-oral mucosa of cheek

Question 16

Auriculotemporal Nerve

Answer 16

Mandibular Division of CN V

-scalp anterior to ear and posterior part of temporal fossa

Question 17

Greater Auricular Nerve

Answer 17

Cervical Plexus

-skin inferior to ear and over parotid gland

Question 18

Trigeminal Neuralgia

Answer 18

DISORDER of CN V

• sudden excruciating pain on face (15-20 min long)
• Maxillary nerve involved usually
• Cause Unknown