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Neuroanatomy Finals > Cranial Nerve Nuclei > Flashcards

Cranial Nerve Nuclei Flashcards

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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
It is also called as the ___________
Entorhinal area (area 28) of the parahippocampal gyrus
26
It controls the **movements** and s**hape of the tongue**
Hypoglossal Nerve (CN XII)
27
The main oculomotor nucleus receives
* Corticonuclear fibers * Tectobulbar Fibers from the **superior colliculus where it receives info from the visual cortex** * Medial Longitudunal fasiculus
28
It supplies all the extrinsic muscles of the eye **except the Superior Oblique and Lateral Rectus**
Main Oculomotor Nucleus
29
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**
Trochlear Nerve (CN IV)
30
Are often known as the Olfactory Cortex
* Periamygdaloid * Prepiriform areas
31
It conducts nerve impulses concerned with **sound** from the** organ of corti** in the cochlea
Cochlear Nerve
32
It is Situated posterior to the main oculomotor nucleus
Accessory Parasympathetic Nucleus ( Edinger Westphal)
33
It is entirely Motor and supplies the **Lateral Rectus muscles**
The Abducens Nerve (CN VI)
34
The Abducens Nerve (CN VI) receives
***afferent corticonuclear fibers** * tectobulbar tract * fibers from the medial longitudinal fasciculus
35
# In the Trigeminal Nerve this nucleus Continuous **superiorly with the main sensory nucleus** in the pons
Spinal Nucleus
36
The olfactory tract consists of ________
* Axons of the mitral and tufted cells of the bulb * Centrifugal fibers
37
It supplies the superior oblique muscle of the eyeball
Trochlear Nerve (CN IV) | It is **entirely Motor**
38
It sends nerve fibers to many other centers within the brain to establish connections for emotional and autonomic responses to olfactory sensations
Primary Olfactory Cortex
39
# 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
Mesencephalic Nucleus
40
Upon entering the **Pons** the Cochlear Nerve dividees into the ______
* Posterior Cochlear Nucleus * Anterior Cochlear Nucleus
41
4 Nuclei of the Trigeminal Nerve (CN V)
* Main sensory nucleus * Spinal nucleus * Mesencephalic nucleus * Motor nucleus
42
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.
Olfactory Tract
43
Largest type of nerve cell in the olfactory bulb
Mitral Cell
44
It occupies upper & lower lips of calcarine sulcus on medial surface of cerebral hemisphere
Visual Cortex Area 17
45
# In the Trigeminal Nerve this nucleus Lies on the **posterior part of pons**, lateral to the motor nucleus
Main Sensory Nucleus
46
It is Situated in the anterior part of gray matter that surrounds the cerebral aqueduct of midbrain and lies at the **superior colliculus**
Main Oculomotor Nucleus
47
Olfactory nerve fibers are _______
**Unmyelinated** and are covered with **Schwann cells**
48
The olfactory tract divides into _______
* Medial Olfactory Striae * Lateral Olfactory Striae
49
# This olfactory receptor cell process has a number of short cilia that arise from the mucus covering surface of the Mucous membrane
Coarse Peripheral Process
50
The Vestibuchoclear Nerve (CN VIII) has 2 distinct Parts _____________
* Vestibular Nerve * Cochlear Nerve
51
The oculomotor nerve (CN III) has two motor nuclei ______ ____________
* Main Motor Nucleus * Accessory Parasymphatetic Nucleus
52
Trochlear Nerve (CN 4) receives
* corticonuclear fibers * tectobulbar fibers, which **connect it to the visual cortex** through the superior colliculus. * fibers from medial longitudinal fasciculus
53
# This olfactory receptor cell process forms the olfactory nerve fibers
Fine Central Process
54
Anterior Vagal Trunk
Left
55
Forms part of the General Visceral Motor Nuclei
* **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
The corticonuclear fibers descend through the __________
* Corona Radiata * Genu of the Internal Capsule
57
****Constitutes the First order neuron of the descending pathway
Corticonuclear fibers
58
Are the **axons of nerve cells outside the brain**
The **sensory or afferent parts of a cranial nerve**
59
These Nuclei receive numerous afferent fibers including descending pathways from the hypothalamus
General Visceral Motor Nuclei
60
It carries fibers that cross the medial plane in the anterior commissure to pass to the olfactory bulb of opposite side
Medial Striae
61
These smaller nerve cells also synapse with mitral cells
* Tufted Cells * Granular cells
62
Where does the Corticonuclear fibers synapse?
* **Directly** with the **lower motor neurons** whitin **cranial nerve nuclei** * **Indirectly** through the **internuncial neurons**
63
This is an **Ovoid Structure** that possesses several types of nerve cells
Olfactory Bulb
64
Vagal system
1971 (10, 9, 7, 11)
65
It arises from the olfactory receptor nerve cells in the olfactory mucous membrane
Olfactory Nerves (CN I)
66
It emerges from optic chiasma and passes posterolaterally around cerebral peduncle
Optic Tract
67
Constitutes the **Second order neuron**
Internuncial Neuron
68
The accessory parasympathetic nucleus receives
* corticonuclear fibers for the **accommodation reflex** * fibers from the pretectal nucleus for the **direct and consensual light reflexes.**
69
Where does the majority of the corticonuclear fibers cross before reaching the nuclei?
Median Plane
70
Bilateral Connections are present for all the cranial motor nuclei except for _____
* Part of the **Facial Nucleus** * Part of **Hypoglossal Nucleus**
71
Sensory Nerves
128
72
The Main Motor Nucleus of the Vagus Nerve has Efferent Fibers that supply ______________
Constrictor muscles of the pharynx and intrinsic muscles of larynx
73
The Parasymphatetic nucleus of the Glossopharyngeal Nerve (CN IX) is also called the ______
Inferior salivatory nucleus

Neuroanatomy Finals (2 decks)

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