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Dental Boards Review > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

Learn more about the CN

1
Q

Number of Cranial Nerves

A

12 Paired CN

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2
Q

Two fibers of the Nerves

A

Sensory and Motor

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3
Q

If ask what CN innervates this muscle refers to?

a. Sensory
b. Motor

A

Motor

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4
Q

AKA

S. A. M. E

A

Sensory=Afferent

Motor = Efferent

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5
Q

What are the 12 paired CN?

A
  1. Olfactory
  2. Optic
  3. Oculomotor
  4. Trochlear
  5. Trigeminal
  6. Abducens
  7. Facial
  8. Auditory/Vestibulocochlear
  9. Glossopharyngeal
  10. Vagus
  11. Accessory
  12. Hypoglossal
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6
Q

Foramen exit of CN 1

A

Cribriform plate of Ethmoid bone

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7
Q

Olfactory

a. Sensory
b. Motor

A

Sensory:Smell

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8
Q

Receptor Cell of CN1

A

Olfactorants

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9
Q

Ethmoid bone is usually found?

A

Posterior to the nose

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10
Q

Optic refers to?

A

Vision

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11
Q

Foramen exit of CN2

A

Optic Canal of Sphenoid bone

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12
Q

CN2 receptor cells

A

Rods and Cones

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13
Q

Rods is to ____

Cones is to ____

A

Night time

Daytime/Colors

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14
Q

CN2 receptor cells are found which part of the eye?

A

Retina

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15
Q

If ask which receptor cell of CN2 is deficient in person with color blindness?

A

Cones

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16
Q

Artery that exits in optic canal

A

Opthalmic artery

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17
Q

If ask what structures are affected if optic canal is damage from trauma?

A

Optic Nerve

Opthalmic artery

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18
Q

Optic is purely?

A

Sensory:Vision

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19
Q

Oculo=

Motor=

A

Eye Muscles/movement

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20
Q

Foramen exit of CN3

A

Superior Orbital Fissure of sphenoid bone

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21
Q

Oculomotor is purely?

A

Motor

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22
Q

SO4 LR6 R3

A

Superior Oblique muscle- CN 4
Lateral Rectus M.- CN6
Rest of the eye muscles are innervated by CN3

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23
Q

Parasympathetic of CN3

A

Sphincter pupillae and ciliary lens

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24
Q

If ask where is the specific location of SOF?

A

junction/demarcation of greater and lesser wings of sphenoid bone

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25
Q

Bat-wings shape

A

Sphenoid bone

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26
Q

What does Parasympathetic means?

A

Balance

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27
Q

Foramen exit of CN4

A

SOF

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28
Q

Foramen exit of CN6

A

SOF

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29
Q

Structures that exits in SOF

A

CN3, 4, 6, opthalmic branch of CN5 and opthalmic vein

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30
Q

Largest cranial nerve of head and neck

A

Trigeminal Nerve or CN5

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31
Q

How many branches does CN5 has?

A

3

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32
Q

What do you call that collection of nerves outside the brain?

A

Ganglion

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33
Q

What do you call that collection of nerves inside the brain?

A

Nuclei

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34
Q

4 nuclei of CN5

A

Mesencephalic nucleus
Principal sensory
Spinal nucleus
motor nucleus

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35
Q

It is responsible for Jaw-Jerk reflex

A

Mesencephalic nucleus

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36
Q

Half moon shape

A

Trigeminal ganglion

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37
Q

Location of Gasserian ganglion

A

Meckel’s cave of petrous portion of the temporal bone

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38
Q

3 branches of CN V

A

V1 Opthalmic
V2 Maxillary
V3 Mandibular

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39
Q

Main branches of CN V1

A

Frontal
Nasociliary
Lacrimal nerves

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40
Q

Largest branch of CN V1

A

Frontal

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41
Q

Smallest branch of CN V1

A

Lacrimal nerves

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42
Q

Foramen exit of CN V1

A

SOF

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43
Q

Organs innervated by CN V1

A

Cornea
Nose
Forehead
Scalp

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44
Q

Main branches of CN V2

A

Zygomatic
Pterygopalatine (sphenopalatine)
PSAN

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45
Q

Other names of PTERYGOPALATINE nerve

A

Sphenopalatine
Nasopalatine
Nerve of Scarpa

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46
Q

Foramen exit of CN V2

A

Foramen rotundum

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47
Q

Organs innervated by CN V2

A 
SENSORY:
Lower eyelid
Upper lip
Nasopharynx
Tonsils
Palate
Paranasal sinuses
Mx teeth
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48
Q

What are the Paranasal sinuses?

A

Maxillary
Frontal
Ethmoid
Sphenoid

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49
Q

Main function of the paranasal sinuses.

A

Lightens the weight of the skull

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50
Q

Terminal branch of CN V2

A

Infraorbital nerve

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51
Q

Nerves included in the Outer nerve loop

A

ASAN
MSAN
PSAN

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52
Q

Nerves included in the INNER NERVE LOOP

A

Nasopalatine nerve
Greater palatine nerve
Lesser palatine nerve

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53
Q

ASAN innervates?

A

Labial surfaces of anterior teeth

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54
Q

MSAN innervates?

A

bicuspids and mesiobuccal root of mx 1st molar

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55
Q

PSAN innervates

A

From distobuccal root of mx 1st molar to the 3rd molar

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56
Q

Nasopalatine innervates?

A

Palatal area of anterior teeth

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57
Q

Greater palatine innervates?

A

Palatal area of all posterior teeth

58
Q

Lesser palatine nerve innervates?

A

soft tissues of Soft palate, uvula, tonsils

59
Q

Distance of Greater palatine foramen to the lesser palatine foramen

A

2mm

60
Q

Ganglion where ASAN and MSAN meet

A

Bochdalek

61
Q

Ganglion where MSAN and PSAN meet

A

Valentine

62
Q

BQ. Sphenopalatine nerve is a branch of?

A

Maxillary nerve

63
Q

Branches of CN V3 located in the ANTERIOR TRUNK

A

Buccal nerve
Masseteric nerve
Deep temporal nerve
Nerve to lateral pterygoid

64
Q

The only sensory nerve in the anterior trunk of CN V3

A

Buccal Nerve

65
Q

Branches of CN V3 located in the POSTERIOR TRUNK

A

IAN
Auriculotemporal Nerve
Lingual nerve

66
Q

Largest branch of CN V3

A

IAN

67
Q

Terminal branch of CN V3

A

Mental nerve

68
Q

BQ. Location of mandibular foramen in relation to the occlusal plane in adult

A

above or level to the occlusal plane

69
Q

BQ. Location of mandibular foramen in relation to the occlusal plane in children

A

below the occlusal plane

70
Q

IAN innervates?

A

All Mn teeth

71
Q

Mental nerve innervates?

A

Soft tissues of anterior teeth

lower lip

72
Q

Foramen exit of CN V3

A

Foramen ovale

73
Q

Sensory innervation of CN V3

A 
Auditory meatus
TMJ
Chin
Lower lip
Anterior 2/3 (tip) of the tongue
Mn teeth
74
Q

2 sensation of the tongue

A

Pain

Taste

75
Q

Responsible for the sensation of PAIN in the tongue

A

Lingual nerve of Mandibular branch of the Trigeminal nerve (Lingual of CN V3)

76
Q

Motor innervation of CN V3

A 
Muscles of mastication
Ant. belly of digastric
Tensor tympani
Tensor veli palatini
mylohyoid muscles
77
Q

What nerves innervates the TMJ?

A

Auriculotemporal nerve branch of Mandibular nerve of the Trigeminal nerve (ATN of CN V3)

78
Q

What are the muscles of mastication?

A

Temporalis muscle
Internal pterygoid
Masseter
External pterygoid

79
Q

Prime mover of the muscles of mastication

A

External Pterygoid

80
Q

Velum means?

A

Soft Palate

81
Q

Mylohyoid muscle is found?

A

floor of the mouth

82
Q

BQ. Which branch of trigeminal nerve has motor fiber?

A

CN V3

83
Q

Branches of CN VII

A 
Temporalis
Zygomatic
Buccal
Marginal mandibular
Cervical
84
Q

Most superior branch of CN VII

A

Temporalis

85
Q

Foramen exit of CN VII

A

Internal acoustic meatus–> stylomastoid foramen

86
Q

BQ. Which foramen does CN VII exits?

A

Stylomastoid foramen

87
Q

What innervates the Posterior belly of digastric muscles?

A

CN VII

88
Q

Stylomastoid foramen is located?

A

in TEMPORAL bone

89
Q

Sensory innervation of CN VII

A

Taste to the anterior 2/3 (tip) of the tongue

90
Q

Responsible for the taste sensation of the anterior 2/3 of the tongue

A

Chorda tympani of CN VII

91
Q

Parasympathetic innervation of CN VII

A

lacrimal, sublingual and submandibular glands

92
Q

BQ. What nerve innervates mimetic muscle?

A

CN VII

93
Q

Mimetic muscles is also known as

A

Muscles of facial expressions

94
Q

What are the Mimetic muscles?

A

Occipitofrontalis- surprise
Corrugator supercilli- frowning
Orbicularis oculi- wink
Zygomaticus major- smiling
Risorius- plasticity
Levator labii superioris alaque nasi- snarl
Orbicularis oris- main muscle for pout and kissing
a. Depressor labii inferioris- sorrow, doubt and melancholy
b. Buccinator- whistling and sucking
c. Mentalis- pouting

95
Q

Muscle responsible for surprise

A

Occipitofrontalis

96
Q

Muscle that draws the eyebrows closer to each other

A

Corrugator supercilli

97
Q

Muscle responsible for closing the eyelid. Innervated by?

A

Orbicularis oculi - CN VII

98
Q

Muscle responsible for opening the eyelid. Innervated by?

A

levator palpebrae muscle= CN III

99
Q

Caninus is also known as

A

levator anguli oris

100
Q

Triangularis is also known as

A

depressor anguli oris

101
Q

how many muscles involved when smiling?

A

17

102
Q

How many muscles involved when Angry?

A

43

103
Q

Difference between gland and duct

A 
gland= PRODUCES
duct= SECRETES
104
Q

Foramen exit of CN VIII

A

Internal acoustic meatus of temporal bone

105
Q

Sensory of CN VIII

A

Hearing and Balance

106
Q

BQ. 2 strucrures that passes in the Internal acoustic meatus

A

CN VII and CNVIII

107
Q

Foramen exit of CN IX

A

Jugular foramen

108
Q

Sensory innervation of CN IX

A 
Posterior 1/3 of the tongue
pharynx 
tonsils
middle ear
carotid sinus
109
Q

Function of carotid sinus

A

lowers BP

110
Q

Motor innervation of CN IX

A

Stylopharyngeus

111
Q

Parasympathetic innervation of CN IX

A

Parotid gland

112
Q

Other term for Bell’s Palsy

A

Facial Nerve paralysis

113
Q

What causes Bell’s palsy? (not dental)

A

idiopathic

114
Q

Dental cause for Bell’s palsy

A

Penetrates parotid gland capsule during IAN administration/ injection of IAN too far posterior

115
Q

Largest cranial nerve of the body

A

Vagus nerve CN X

116
Q

Foramen exit of CN X

A

Jugular Foramen

117
Q

Sensory innervation of CN X

A

Heart
Abdominal organs
lungs
base of tongue

118
Q

Motor innervation of CN X

A

Laryngeal muscles
All Pharyngeal muscle except Stylopharyngeus
All Palatal muscle except Tensor veli palatini

119
Q

nerve that innervates stylopharyngeus muscle?

A

CN IX

120
Q

nerve that imnervates tensor veli palatini

A

CN V

121
Q

Parasympathetic innervation of CN X

A

Heart
Abdominal organs
lungs

122
Q

Other name of accessory nerve

A

Spinal nerve

123
Q

Foramen exit of CN XI

A

Jugular foramen

124
Q

Motor innervation of CN XI

A

Sternocleidomastoid muscle

Trapezius

125
Q

Responsible for rotating and flexing the head

A

Sternocleidomastoid

126
Q

Responsible for tilting the head

A

Trapezius

127
Q

Lateral boundary of the neck

A

Sternocleidomastoid

128
Q

Anterior boundary of the neck. Innervated by?

A

Platysma - CN VII

129
Q

Posterior boundary of the neck. Innervated by?

A

Trapezius - CN XI

130
Q

Muscle involved in WHIPLASH

A

SCM (over extended)

131
Q

BQ. Innervates muscles of the neck

A

CN VII and XI

132
Q

Structures that exit in Jugular Foramen

A

CN IX, X and XI

133
Q

Foramen exit of CN XII

A

Hypoglossal canal of occipital bone

134
Q

Motor innervation of CN XII

A

Extrinsic and intrinsic muscles of the tongue

135
Q

What is the largest cranial merve of the Head and Neck?

A

Trigeminal Nerve

136
Q

What is the largest cranial nerve of the WHOLE body?

A

Vagus nerve

137
Q

What is the longest intracranial nerve?

A

Trochlear nerve

138
Q

Pure afferent CN

A

I, II and VIII

139
Q

Pure efferent CN

A

III, IV, VI, XI, and XII

140
Q

Mixed CN

A

V, VII, IX and X

141
Q

Parasympathetic CN

A

III, VII, IX and X

142
Q

Pharyngeal plexus (nerves that innervates pharynx)

A

IX, X and XI

Dental Boards Review (34 decks)

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