Cranial nerves are spinal nerves that come out of the brain instead of the spinal cord Cranial Nerves Cranial nerves are spinal nerves that come out of the brain instead of the spinal cord ID: 777315
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Slide1
The Cranial Nerves
Slide2Cranial Nerves
Cranial nerves are spinal nerves that come out of the brain instead of the spinal cord.
Slide3Cranial Nerves
Cranial nerves are spinal nerves that come out of the brain instead of the spinal cord.
They can serve either a sensory, motor or mixed (both) functions.
Slide4Frontal lobe
Temporal lobe
Infundibulum
Facial
nerve (VII)
Vestibulo-
cochlear
nerve (VIII)
Glossopharyngeal
nerve (IX)
Vagus nerve (X)
Accessory nerve (XI)
Hypoglossal nerve (XII)
(a)
Filaments of
olfactory
nerve (I)
Olfactory bulb
Olfactory tract
Optic chiasma
Optic nerve
(II)
Optic tract
Oculomotor
nerve (III)
Trochlear
nerve (IV)
Trigeminal
nerve (V)
Abducens
nerve (VI)
Cerebellum
Medulla
oblongata
Slide5*PS = parasympathetic
(b)
Cranial nerves
I – VI
I
II
III
IV
V
VI
Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Yes (smell)
Yes (vision)
No
No
Yes (general
sensation)
No
No
No
Yes
Yes
Yes
Yes
No
No
Yes
No
No
No
Cranial nerves
VII – XII
Sensory
function
Motor
function
PS*
fibers
Sensory
function
Motor
function
PS*
fibers
VII
VIII
IX
X
XI
XII
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
Accessory
Hypoglossal
Yes (taste)
Yes (hearing
and balance)
Yes (taste)
Yes (taste)
No
No
Yes
Some
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
Slide6Function
Slide7Mnemonic
There are a variety of mnemonics that help you remember the cranial nerves.
“On occasion, our trusty truck acts funny, very good vehicle anyhow”
Slide8Mnemonics
There are a variety of mnemonics that help you remember the cranial nerves.
“On occasion, our trusty truck acts funny, very good vehicle anyhow”
For Function
“Some say marry money but my mother say bad business marry money”
Slide9Examination of Cranial Nerve Function
Each cranial nerve carries out specific functions
.
Testing for a deficiency of a cranial nerves' function can give a clinician an idea of where the problem is located in a person’s brain.
Slide10Common Cranial Nerve Conditions
Bell’s Palsy results from damage to the seventh cranial nerve or facial nerve.
Bell's palsy is characterized by a one sided facial droop that comes on within 72 hours
Slide11Common Cranial Nerve Conditions
Trigeminal neuralgia
is a condition involving intense pain in the area innervated by the Trigeminal or fifth cranial nerve.