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ANAT 200 > Lesson 15 Cranial Nerves > Flashcards

Lesson 15 Cranial Nerves Flashcards

1
Q

Where would you find the cell bodies of sensory neurons of the cranial nerves?

A

Cranial Nerve Ganglia

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2
Q

Where do the cranial nerves and spinal nerves emerge from?

A

cranial nerves emerge from the area of the brain stem

Spinal nerves emerge from the spinal cord

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3
Q

Cranial nerve I is?

A

Olfactory

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4
Q

Cranial nerve II is

A

Optic

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5
Q

Cranial nerve III is

A

Oculomotor

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6
Q

CN iV

A

Trochlear

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7
Q

CN V -

A

Trigeminal

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8
Q

CN VI -

A

Abducens

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9
Q

CN VII

A

Facial

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10
Q

CN VIII

A

Vestibulocochlear

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11
Q

CN IX -

A

Glossopharyngeal

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12
Q

CN X -

A

Vagus

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13
Q

CN XI -

A

Spinal accessory

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14
Q

CN XII

A

Hypoglossal

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15
Q

The Olfactory Nerve (CN I) runs from the _______ to the ______ in the frontal lobe

A

The Olfactory Nerve (CN I) runs from the Olfactory epithelium to the Olfactory Bulb in the frontal lobe

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16
Q

The Olfactory Nerve (CN I)

  • mixed, motor, or sensory?
  • Responsible for?
A

Purely sensory

Responsible for Smell

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17
Q

The only sensory system that bypasses the thalamus is:

A

The Olfactory system

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18
Q

Where does the olfactory tract synapse?

A

Primary olfactory cortex (temporal lobe)

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19
Q

Anosmia is:

Hyposmia:

A

Anosmia = lack of smell

Hyposmia = decrease in ability to smell

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20
Q

Optic Nerve (CNII) cell bodies arise from?

A

The retina

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21
Q

The axons of what neurons join to become the Optic nerve?

A

Retinal ganglion cell neurons

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22
Q

What happens at the optic chiasm?

A

Half of the axons of the optic nerve cross over.

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23
Q

What is the optic nerve called after the chiasm?

A

Optic Tract (collection of axons in the CNS = tract)

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24
Q

Where does the optic tract synapse?

A

Lateral geniculate nucleus

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25
Axons from the Lateral geniculate nucleus (called \_\_\_\_\_\_\_\_\_) synapse on the \_\_\_\_\_\_\_\_\_
Axons from the Lateral geniculate nucleus (called _Optic Radiations_) synapse on the P_rimary Visual Cortex_
26
Which CN's control the muscles of the eye?
CN III - Oculomotor CN IV - Trochlear CN VI - Abducens
27
How many of the 6 eye muscles does the Oculomotor Nerve control?
4/6 and also the levator palpebrae superioris (eyelid)
28
Is oculomotor mixed, sensory or motor?
Mixed Somatic motor and parasympathetic (constrict pupil and accomodation)
29
What does LR6SO4 mean?
The lateral rectus is innervated by CN VI The Superior Oblique is innervated by CN IV
30
What is opthalmoplegia?
Damage to the CN III which results in weakened or paralyzed eye movements
31
Which is the smallest CN?
Trochlear
32
Is the trochlear nerve mixed, sensory or motor?
Purely motor Innervates Superior Oblique
33
Is CN VI (abducens) motor, sensory or mixed?
Purely Motor
34
The longest intracranial course of the cranial nerves is:
Abducens
35
What muscle is innervated by CN VI (abducens)?
Lateral rectus
36
Damage to the Abducens Nerve results in?
unopposed action of medial rectus = eye deviates medially Double-vision (diplopia)
37
Where would you find the sensory cell bodies of the trigeminal nerve?
Trigeminal ganglion
38
CN V (trigeminal) has 3 branches: V1: V2: V3:
CN V (trigeminal) has 3 branches: V1: Opthalmic V2: Maxillary (what is frozen at the dentist when working on upper teeth) V3: Mandibular (frozen when getting work done on bottom teeth)
39
Is CN V (trigeminal) sensory, motor or mixed? What are each of the 3 branches?
Mixed V1 = pure sensory (eye) V2 = Pure sensory (cheek) V3 = motor + sensory (mandible)
40
Which three cranial nerves use CN V (trigeminal) as a conduit for parasympathetic functions?
CNs III, VII and IX
41
What is a common disease of the trigeminal nerve?
Trigeminal neuralgia = chronic pain in cheek and jaw region (mainly v2 and v3)
42
The trigeminal nerve emerges from:
Pons of the **brainstem**
43
The supraorbital nerve are a branch from _______ and supply the \_\_\_\_\_\_
CN v1 (ophthalmic branch of the trigeminal nerve) and supplies the skin to the forehead and air-sinuses in the skull
44
Which nerve branches off of the maxillary branch of the trigeminal nerve (V2) and enters the floor of the orbit through the infraorbital foramen?
Infraorbital nerve
45
Which nerve senses touch in the anterior part of the tongue and branches off of the Mandibular Nerve of the trigeminal nerve (V3)?
Lingual nerve
46
Where does the mandibular nerve enter through?
Infratemporal fossa
47
Which CN supplies the muscles of mastication?
CN V3 (Mandibular nerve branch of the trigeminal nerve)
48
Muscles of facial expression are innervated by which nerve?
CN VII Facial Nerve
49
Taste on the anterior 2/3 of the tongue is sensed with the _______ nerve (branch of the Facial Nerve)
Chorda Tympani Nerve
50
Sensory cell bodies of the facial nerve are found in the:
Geniculate ganglion
51
What is the Facial nerve (CN VII) known for? (3)
Somatic motor (muscles of facial expression) Somatic sensory (tragus of ear) Parasympathetic (lacrimal gland (tears) of eye, taste and salivation)
52
Someone with bell's palsy has damage to which nerve?
CN VII (facial) = hemifacial paralysis
53
Which nerve regulates the gag reflux?
Glossopharyngeal (CN IX)
54
CN IX (glossophryngeal) innervates what muscle?
stylopharygeus (elevates pharynx) only pharyngeal muscle that is not innervated by CN X (vagus)
55
Where are the cell bodies of the vagus nerve?
Medulla
56
Difficulty in speech and swallowing could be the result of damage to the:
Vagus nerve
57
Which muscles are innervated by the Vagus nerve (CN X)
Muscles of the palate, pharynx and larynx
58
What are the sensory functions of the vagus nerve?
Visceral afferents
59
CN X is the major _______ nerve
parasympathetic
60
Is CN XI (spinal accessory nerve) sensory, motor or mixed?
Motor only
61
Which nerve innervates the sternocleidomastoid and trapezius muscle?
Spinal accessory nerve (CN XI)
62
Weakness when shrugging, turning head to one side could be the result of damage to which nerve?
XI Spinal Accessory
63
The Hypoglossal nerve (CN XII) is _______ (motor, sensory or mixed) and is attached to the ______ and supplies the \_\_\_\_\_\_
The Hypoglossal nerve (CN XII) is _motor_ (motor, sensory or mixed) and is attached to the _medulla_ and supplies the _muscles of the tongue_

ANAT 200 (20 decks)

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