LA anatomy Flashcards

1
Q

what is the largest cranial nerve?

A

trigeminal

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2
Q

where do the 3 divisions of the trigeminal nerve arise?

A

trigeminal ganglion

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3
Q

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

A

cranial fossa

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4
Q

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

A

superior orbital fissure

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5
Q

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

A

foramen rotundum

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6
Q

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

A

foramen ovale

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7
Q

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

A

the orbit

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8
Q

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

A

ptergopalatine fossa

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9
Q

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

A

infra temporal fossa

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10
Q

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

A

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

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11
Q

is the ophthalmic nerve sensory or motor?

A

sensory

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12
Q

the ophthalmic nerve provides innervations to where?

A

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

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13
Q

is the maxillary nerve sensory or motor ?

A

sensory

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14
Q

the maxillary nerve provides innervations to?

A

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

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15
Q

is the mandibular nerve sensory or motor?

A

both

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16
Q

the mandibular nerve provides sensory innervations to?

A

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

17
Q

what is the motor function of the mandibular nerve?

A

muscles of mastication

18
Q

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

A

frontal nerve
nasocilliary nerve
lacrimal nerve

19
Q

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

A

long cilliary nerves
infratrochlear nerve
anterior ethmoidal nerve

20
Q

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

A

ophthalmic - sympathetic

occulumotor - parasympathetic

21
Q

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

A

supraorbital and supratrochlear

22
Q

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?

A
greater and lesser palatine nerves 
posterior superior alveolar nerve
infra orbital nerve
nasopaltine nerve
pharyngeal nerve
23
Q

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

A

palatine canal

24
Q

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

A

pterygomandibular fissure

25
Q

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

A

inferior orbital fissure

26
Q

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

A

sphenopalatine fossa

27
Q

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

A

palatovaginal canal

28
Q

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

A

motor supply to 4 muscles of mastication

buccal branch provides sensory innervation to cheek

29
Q

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

A

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

30
Q

name the 4 major branches of the mandibular nerve?

A

auriculotemporal
inferior alveolar
lingual
buccal

31
Q

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

A

chorda tympani

32
Q

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

A

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

33
Q

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

A

auricolutemporal branch

34
Q

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

A

internal acoustic meatus

stylomastoid foramen

35
Q

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?

A

parotid gland

36
Q

name the 5 main motor branches of the facial nerve?

A
temporal
zygomatic
buccal
marginal mandibular
cervical
37
Q

describe some sensory functions of the facial nerve?

A

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

38
Q

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

A

HSV