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Neuroanatomy Finals > Cranial Nerve Nuclei > Flashcards

Cranial Nerve Nuclei Flashcards

1
Q

Small motor nucleus is situated beneath the floor of upper part of 4th ventricle close to the midline and beneath the colliculus facialis

A

Abducens Nerve (CN VI)

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2
Q

The Glossophrayngeal Nerve (CN IX) has 3 Nuclei ____________

A
  • Main Motor Nucleus
  • Parasymphatetic Nucleus
  • Sensory Nucleus

The same with Vagus Nerve (CN X)

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3
Q

The vestibular nuclei receieve _______

A
  • afferent fibers from the utricle and saccule and semicircular canals through the vestibular nerve
  • fibers from the cerebellum
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4
Q

These are the axons of nerve cells situated within the brain

A
  • Somatic Motor
  • Branchiomotor nerve fibers **of a Cranial Nerve
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5
Q

In the Glossopharyngeal nerve (CN IX)

this Nucleus has efferent fibers that supply the stylopharyngeus muscle

A

Main Motor Nucleus

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6
Q

They are the axons of the nerve
cells of the lateral geniculate body

A

Optic Radiation

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7
Q

Mixed Sensory and Motor Nerves

A

1975 (10, 9, 7, 5)

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8
Q

It is responsible for recognition of objects and perception of color

A

Visual Association Cortex (Areas 18 and 19)

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9
Q

The motor nuclei of the cranial nerves receive impulses from the cerebral cortex through the _______________

A

Corticonuclear (Corticobulbar) Fibers

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10
Q

In the Trigeminal Nerve this nucleus

Situated in the** pons, medial
to the main sensory nucleus**

A

Motor Nucleus

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11
Q

It is a small projection from pulvinar (posterior) part of thalamus

A

Lateral Geniculate Body

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12
Q

It is situated at the junction of the anterior wall and floor of 3rd ventricle

A

Optic Chiasma

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13
Q

Each Olfactory receptor cell consists of ______

A
  • Small bipolar nerve cell with Coarse Peripheral Process
  • Fine central Process
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14
Q

PArasymphathetic Nerves

A

1973 (10, 9, 7, 3)

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15
Q

Constitutes the Third order neuron

A

Lower Motor Neuron

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16
Q

It forms the cranial outflow of the parasympathetic portion of the autonomic nervous system

A

General Visceral Motor Nuclei

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17
Q

Where does incoming olfactory nerves synapse with

A

Dendrites of the Mitral Cells

Together they form Rounded Areas known as synaptic glomeruli

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18
Q

Corticonuclear Fibers originate from the pyramidal cells in the ____________

A
  • Inferior part of the precentral gyrus (area 4)
  • Adjacent part of the postcentral gyrus
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19
Q

These areas of the cortex are responsible for
the appreciation of olfactory sensations.

A

Primary and Secondary Olfactory Cortex

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20
Q

It is the most slender Cranial Nerve and only one to leave the posterior surface of the brainstem

A

Trochlear Nerve (CN IV)

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21
Q

Posterior Vagal Trunk

A

Right

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22
Q

It carries axons to the olfactory area of cerebral cortex

A

Lateral Striae

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23
Q

It receives numerous connections from the
primary olfactory cortex

A

Entorhinal area (area 28) of the parahippocampal
gyrus

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24
Q

What are the 4 neurons that conduct visual impulses to the visual cortex

A
  • Rods and Cons
  • Bipolar Neurons
  • Ganglion Cells
  • Neurons of lateral geniculate body
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25
Q

It is also called as the ___________

A

Entorhinal area (area 28) of the parahippocampal
gyrus

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26
Q

It controls the movements and shape of the tongue

A

Hypoglossal Nerve (CN XII)

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27
Q

The main oculomotor nucleus receives

A
  • Corticonuclear fibers
  • Tectobulbar Fibers from the superior colliculus where it receives info from the visual cortex
  • Medial Longitudunal fasiculus
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28
Q

It supplies all the extrinsic muscles of the eye except the Superior Oblique and Lateral Rectus

A

Main Oculomotor Nucleus

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29
Q

It is situated in the anterior part of the gray matter that surrounds the cerebral aqueduct in the midbrain and lies inferior to the oculomotor nucleus at the level of inferior colliculus

A

Trochlear Nerve (CN IV)

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30
Q

Are often known as the Olfactory Cortex

A
  • Periamygdaloid
  • Prepiriform areas
31
Q

It conducts nerve impulses concerned with sound from the** organ of corti** in the cochlea

A

Cochlear Nerve

32
Q

It is Situated posterior to the main oculomotor nucleus

A

Accessory Parasympathetic Nucleus ( Edinger Westphal)

33
Q

It is entirely Motor and supplies the Lateral Rectus muscles

A

The Abducens Nerve (CN VI)

34
Q

The Abducens Nerve (CN VI) receives

A

*afferent corticonuclear fibers
* tectobulbar tract
* fibers from the medial longitudinal
fasciculus

35
Q

In the Trigeminal Nerve this nucleus

Continuous superiorly with
the main sensory nucleus in
the pons

A

Spinal Nucleus

36
Q

The olfactory tract consists of ________

A
  • Axons of the mitral and tufted cells of the bulb
  • Centrifugal fibers
37
Q

It supplies the superior oblique muscle of the eyeball

A

Trochlear Nerve (CN IV)

It is entirely Motor

38
Q

It sends nerve fibers to many other centers within the brain to establish connections for emotional and autonomic responses to olfactory sensations

A

Primary Olfactory Cortex

39
Q

In the Trigeminal Nerve this nucleus

Composed of column of unipolar nerve cells situated in the lateral part of gray matter around the cerebral aqueduct

A

Mesencephalic Nucleus

40
Q

Upon entering the Pons the Cochlear Nerve dividees into the ______

A
  • Posterior Cochlear Nucleus
  • Anterior Cochlear Nucleus
41
Q

4 Nuclei of the Trigeminal Nerve (CN V)

A
  • Main sensory nucleus
  • Spinal nucleus
  • Mesencephalic nucleus
  • Motor nucleus
42
Q

It is a Narrow band of white matter that runs from the posterior end of the olfactory bulb beneath the inferior surface of the frontal lobe of the brain.

A

Olfactory Tract

43
Q

Largest type of nerve cell in the olfactory bulb

A

Mitral Cell

44
Q

It occupies upper & lower lips of calcarine sulcus on medial surface of cerebral hemisphere

A

Visual Cortex Area 17

45
Q

In the Trigeminal Nerve this nucleus

Lies on the posterior part of
pons, lateral to the motor
nucleus

A

Main Sensory Nucleus

46
Q

It is Situated in the anterior part of gray matter that surrounds the cerebral aqueduct of midbrain and lies at the superior colliculus

A

Main Oculomotor Nucleus

47
Q

Olfactory nerve fibers are _______

A

Unmyelinated and are covered with Schwann cells

48
Q

The olfactory tract divides into _______

A
  • Medial Olfactory Striae
  • Lateral Olfactory Striae
49
Q

This olfactory receptor cell process

has a number of short cilia that arise from the mucus covering surface of the Mucous membrane

A

Coarse Peripheral Process

50
Q

The Vestibuchoclear Nerve (CN VIII) has 2 distinct Parts _____________

A
  • Vestibular Nerve
  • Cochlear Nerve
51
Q

The oculomotor nerve (CN III) has two motor nuclei ______ ____________

A
  • Main Motor Nucleus
  • Accessory Parasymphatetic Nucleus
52
Q

Trochlear Nerve (CN 4) receives

A
  • corticonuclear fibers
  • tectobulbar fibers, which connect it to the visual cortex through the superior colliculus.
  • fibers from medial longitudinal fasciculus
53
Q

This olfactory receptor cell process

forms the olfactory nerve fibers

A

Fine Central Process

54
Q

Anterior Vagal Trunk

55
Q

Forms part of the General Visceral Motor Nuclei

A
  • Edinger-Westphal Nucleus of Oculomotor Nerve
  • Superior Salivatory and Lacrimal Nuclei of Facial Nerve
  • Inferior Salivatory Nucleus of the Glossopharyngeal Nerve
  • Dorsal Motor Nucleus of Vagus Nerve
56
Q

The corticonuclear fibers descend through the __________

A
  • Corona Radiata
  • Genu of the Internal Capsule
57
Q

**Constitutes the First order neuron of the descending pathway

A

Corticonuclear fibers

58
Q

Are the axons of nerve cells outside the brain

A

The sensory or afferent parts of a cranial nerve

59
Q

These Nuclei receive numerous afferent fibers including descending pathways from the hypothalamus

A

General Visceral Motor Nuclei

60
Q

It carries fibers that cross the medial plane in the anterior commissure to pass to the olfactory bulb of opposite side

A

Medial Striae

61
Q

These smaller nerve cells also synapse with mitral cells

A
  • Tufted Cells
  • Granular cells
62
Q

Where does the Corticonuclear fibers synapse?

A
  • Directly with the lower motor neurons whitin cranial nerve nuclei
  • Indirectly through the internuncial neurons
63
Q

This is an Ovoid Structure that possesses several types of nerve cells

A

Olfactory Bulb

64
Q

Vagal system

A

1971 (10, 9, 7, 11)

65
Q

It arises from the olfactory receptor nerve cells in the olfactory mucous membrane

A

Olfactory Nerves (CN I)

66
Q

It emerges from optic chiasma and passes posterolaterally around cerebral peduncle

A

Optic Tract

67
Q

Constitutes the Second order neuron

A

Internuncial Neuron

68
Q

The accessory parasympathetic nucleus receives

A
  • corticonuclear fibers for the accommodation reflex
  • fibers from the pretectal nucleus for the direct and consensual light reflexes.
69
Q

Where does the majority of the corticonuclear fibers cross before reaching the nuclei?

A

Median Plane

70
Q

Bilateral Connections are present for all the cranial motor nuclei except for _____

A
  • Part of the Facial Nucleus
  • Part of Hypoglossal Nucleus
71
Q

Sensory Nerves

72
Q

The Main Motor Nucleus of the Vagus Nerve has Efferent Fibers that supply ______________

A

Constrictor muscles of
the pharynx and intrinsic muscles of larynx

73
Q

The Parasymphatetic nucleus of the Glossopharyngeal Nerve (CN IX) is also called the ______

A

Inferior salivatory nucleus

Neuroanatomy Finals (2 decks)

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