LA anatomy

Question 1

what is the largest cranial nerve?

Answer 1

trigeminal

Question 2

where do the 3 divisions of the trigeminal nerve arise?

Answer 2

trigeminal ganglion

Question 3

in which region of the skull does the trigeminal ganglion lie?

Answer 3

cranial fossa

Question 4

the ophthalmic division of the trigeminal nerve exits the cranial fossa through?

Answer 4

superior orbital fissure

Question 5

the maxillary division of the trigeminal nerve exits the cranial fossa through?

Answer 5

foramen rotundum

Question 6

the mandibular division of the trigeminal nerve exits the cranial fossa through?

Answer 6

foramen ovale

Question 7

after exiting the skull via the superior orbital fissure, where does the ophthalmic division of the trigmeninal nerve enter?

Answer 7

the orbit

Question 8

after exiting the skull via the foramen rotundum, where does the maxillary division of the trigmeninal nerve enter?

Answer 8

ptergopalatine fossa

Question 9

after exiting the skull via the foramen ovale, where does the mandicular division of the trigmeninal nerve enter?

Answer 9

infra temporal fossa

Question 10

what is the function of the trigeminal nerve as a whole?

Answer 10

carry general sensory innverations for most of the head and motor innveravtion to the muscles of mastication

Question 11

is the ophthalmic nerve sensory or motor?

Answer 11

sensory

Question 12

the ophthalmic nerve provides innervations to where?

Answer 12

upper eyelid, cornea, conjunctiva, forehead, scalp and part of nasal cavity

Question 13

is the maxillary nerve sensory or motor ?

Answer 13

sensory

Question 14

the maxillary nerve provides innervations to?

Answer 14

lower eyelid, cheek, side of nose, part of nasal cavity, upper lip, hard and soft palate, maxillary teeth and gingivae

Question 15

is the mandibular nerve sensory or motor?

Answer 15

both

Question 16

the mandibular nerve provides sensory innervations to?

Answer 16

anterior 2/3 tongue (general sensation), tempoauricular skin, side of nose, chin and mandibular teeth

Question 17

what is the motor function of the mandibular nerve?

Answer 17

muscles of mastication

Question 18

the ophthalmic nerve can be divided into 3 major branches, name these?

Answer 18

frontal nerve
nasocilliary nerve
lacrimal nerve

Question 19

nasocilliary branch of the ophthalmic nerve branches into what 3 nerves?

Answer 19

long cilliary nerves
infratrochlear nerve
anterior ethmoidal nerve

Question 20

fibres from both the ophthalmic nerve and oculomotor synapse in the cilliary ganglion, which carries sympathetic fibres and which carries parasympathetic fibres?

Answer 20

ophthalmic - sympathetic

occulumotor - parasympathetic

Question 21

the frontal nerve division of the ophthalmic nerve branches further into which 2 nerves?

Answer 21

supraorbital and supratrochlear

Question 22

the maxillary division of the the trigemnial nerve enters the pterygopalatine fossa through the foramen rotundum and branches into which 5 branches which exit the pterygopalatine fosses via different routes?

Answer 22

greater and lesser palatine nerves 
posterior superior alveolar nerve
infra orbital nerve
nasopaltine nerve
pharyngeal nerve

Question 23

greater and lesser palatine nerves of the maxillary division exit the ptergopalatine fossa via?

Answer 23

palatine canal

Question 24

posterior superior alveolar nerve of the maxillary division exits the ptergopalatine fossa via?

Answer 24

pterygomandibular fissure

Question 25

infra orbital nerve of the maxillary division exits the ptergopalatine fossa via?

Answer 25

inferior orbital fissure

Question 26

nano palatinenerve of the maxillary division exits the ptergopalatine fossa via?

Answer 26

sphenopalatine fossa

Question 27

pharyngeal nerve of the maxillary division exits the ptergopalatine fossa via?

Answer 27

palatovaginal canal

Question 28

the mandibular nerve is divided into anterior and posterior trunks, what is the function of the anterior trunk?

Answer 28

motor supply to 4 muscles of mastication | buccal branch provides sensory innervation to cheek

Question 29

the mandibular nerve is divided into anterior and posterior trunks, what is the function of the posterior trunk?

Answer 29

3 main sensory branches - auricolutemporal nerve, inferior alveolar, lingua nerve motor fibres to mylohyoif muscles and anterior belly of digastric

Question 30

name the 4 major branches of the mandibular nerve?

Answer 30

auriculotemporal inferior alveolar lingual buccal

Question 31

fibres from the facial nerve travel in the lingual nerve via what?

Answer 31

chorda tympani

Question 32

what is the function of fibres from the chorda tympani travelling in the lingual nerve?

Answer 32

carry taste from anterior 2/3 tongue and parasympathetic fibres to submandibular glands via synapse at submandibular ganglion

Question 33

fibres from the glossopharyngeal nerve travel in which branch of the mindibualr nerve?

Answer 33

auricolutemporal branch

Question 34

the facial nerve exits the cranial cavity via 2 structures, what are these?

Answer 34

internal acoustic meatus | stylomastoid foramen

Question 35

what structure is used as an anatomical landmark for tracing the main motor branches of the facial nerve, although has no relationship with this nerve?

Answer 35

parotid gland

Question 36

name the 5 main motor branches of the facial nerve?

Answer 36

``` temporal zygomatic buccal marginal mandibular cervical ```

Question 37

describe some sensory functions of the facial nerve?

Answer 37

carry taste to anterior 2/3 tongue and soft palate parasympathetic fibres to glands below oral fissure parasympathetic innervation of lacrimal glands

Question 38

which virus is known to cause inflammation of the facial nerve and may cause bells palsy?

Answer 38

HSV