H&N anatomy

Question 1

Name the cranial nerves

Answer 1

1. olfactory (S)
2. optic (S)
3. oculomotor (M)
4. trochlear (M)
5. trigeminal (mixed)
6. abducens(M)
7. facial (mixed)
8. vestibulocochlear (S)
9. glossopharyngeal (mixed)
10. vagus (mixed)
11. accessory (M)
12. hypoglossal (M)

Question 2

CN V - branches and supply

Answer 2

-V1 - Opthalmic - sensory to eyeball, orbit, forehead, frontal/ethmoid sinus, anterior scalp, bridge of nose, up eyelid.
Post ganglionic parasymp fibres to lacrimal gland.
Arises from frontal, lacrimal and nasociliary N. SUPERIOR ORBITAL FISSURE

-V2 - Maxillary - sensory info to maxilla and overlying skin, nasal cavity, sinises, palate, nasopharynx. FORAMEN ROTUNDUM
Postganglionic parasymp supply to salivary glands
Branches - Zy / Infraorb / Superior alv

V3 - Mandibular -
motor - medial pterygoid, tensor veli palatini,
Branches - buccal/auriculotemp/lingual/IA

FORAMEN OVALE

Question 3

Auriculotemporal branche of V3

Answer 3

sensory to external ear and scalp

Postganglionic parasymp to parotid gland

Question 4

Facial N branches

Answer 4

Temporal -
Zygomatic - 
Buccal - 
Mandibular - 
Cervical -

Question 5

What is the chorda tympani

Answer 5

PArasymp efferent for submand/sublingual glands

Afferent for TASTE SENSATION

Question 6

Muscles of mastication O/I/Act

Answer 6

• Masseter O - Zygomatic arch, I - Sngle of mandible
  Act - elevate
• Temporalis O - Inferior temporal line(temporal fossa), I - Coronoid process
  Act - elevate and retraction

- Med pterygoid 
O - deep = medial suface of lateral p plate
superficial = maxillary tuberosity
I - Medial surface of the ramus
Act - Elevate

• Lateral pterygoid
  O - Superior head -= infratemporal surface of greater wing of sphenoid. Inferior = anterior surface of neck of mandible
  I - lateral surface of lateral pterygoid plate
  Act - DEPRESSION of mandible and protrude