•
12
pairs .
Cranial nerves
called cranial Nerves bcoz each
of them
•
passes through one cranial
fossa
.
Part
of PNS
•
.
Numbered ant to
-
they post
"
•
as arise
,
from base
of
brain .
Three
types
Motor Mixed
Sensory
efferent fibers Both
tdffodvtfibers
• •
•
.
.
Nerve
1.
Olfactory Smell
from Forebrain
-
comes
Optic vision
2 . nerve -
3. Oculomotor
eye
movement dilate
pupil
-
Midbrain
.
,
4 Trochlear movement
.
vertical
eye
-
.
.
5.
Trigeminal
s: racial sensation ; M : some
facial Expression
-
.
6 Abducent lateral movement
Pontomedullary Junction
eye
-
.
.
Facial
7 s : taste ; M
: Facial
Expression
-
. .
8 Vestibulecochlear
hearing & Balance
-
. .
9
Glossopharyngeal S: Taste ; m :
swallowing
-
.
Vagus
10 s: sensation in visceral muscles ; m :
peristalsis Medulla
Oblongata behind olive )
-
.
.
11
Accessory head & Shoulder Movement
-
.
.
12
Hypoglossal Tongue Movement Medulla
Oblongata Cin
front of olive
-
. .
caecum
Foramen
cribriform plate -
cN=ˢ
canal cN=ˢ
optic
-
6ᵗʰ
Sup .
orbital fissure - CN =3, 44,5 & first branch of .
Foramen Rotan dum -
UN = 6th = 2 Be .
Foramen ovale _ an = 8th = 3ʳᵈ Dr .
Foramen
Spinosum
Carotid Canal
.
Foramen lace
rum
Tnt Acoustic
.
Meatus -
Gv = 7 & 8 .
av=sstʰ
Jugular foramen
au 9,10 &
descending position of
- =
.
Hypoglossal canal au 12th
-
=
.
Foramen
Magnum .
-
Ascending Portion
of an -
- 12ᵗʰ .
, I
Olfactory nerve
•
1ˢᵗ cranial Nerve ☆ Anatomical course .
shortest Transmit smell Nasal to
from epithelium primary Olfactory
•
c. N .
•
cortex .
Derived
from olfactory Pta code
•
.
the
Special visceral
afferent column
Originate in
receptors of olfactory epithelium pass through olfactory
•
•
,
.
(
Types :
sensory foramina cribriform plate ending
) at
olfactory bulbs
•
.
.
•
Functn : Smell .
Smell
Specific Sensory info ?
•
:
Optic nerve
2
• 2ⁿᵈ cranial Nerve .
Fibers
• Derived
from Optic placate Btoodsupphf
Developed from optic
• visual
afferent fibers Transmit visual
:
ophthalmic Branch
of
• vesicle as Eat ,
•
Info from Retina lateral geniculate body
to
post central retinal
continuation
of forebrain
direct
ciliary
.
a a. a.
,
.
pupillary off fibers Regulate pupillary light reflex
• :
Type Sensory
.
.
• :
Efferent fibers Unknown funn
:
•
punt
:
.
• vision .
•
Only PNS nerve which is not
•
photostatic fibers visual body reflexes
: .
Spared by Multiple sclerosis .
12
pairs .
Cranial nerves
called cranial Nerves bcoz each
of them
•
passes through one cranial
fossa
.
Part
of PNS
•
.
Numbered ant to
-
they post
"
•
as arise
,
from base
of
brain .
Three
types
Motor Mixed
Sensory
efferent fibers Both
tdffodvtfibers
• •
•
.
.
Nerve
1.
Olfactory Smell
from Forebrain
-
comes
Optic vision
2 . nerve -
3. Oculomotor
eye
movement dilate
pupil
-
Midbrain
.
,
4 Trochlear movement
.
vertical
eye
-
.
.
5.
Trigeminal
s: racial sensation ; M : some
facial Expression
-
.
6 Abducent lateral movement
Pontomedullary Junction
eye
-
.
.
Facial
7 s : taste ; M
: Facial
Expression
-
. .
8 Vestibulecochlear
hearing & Balance
-
. .
9
Glossopharyngeal S: Taste ; m :
swallowing
-
.
Vagus
10 s: sensation in visceral muscles ; m :
peristalsis Medulla
Oblongata behind olive )
-
.
.
11
Accessory head & Shoulder Movement
-
.
.
12
Hypoglossal Tongue Movement Medulla
Oblongata Cin
front of olive
-
. .
caecum
Foramen
cribriform plate -
cN=ˢ
canal cN=ˢ
optic
-
6ᵗʰ
Sup .
orbital fissure - CN =3, 44,5 & first branch of .
Foramen Rotan dum -
UN = 6th = 2 Be .
Foramen ovale _ an = 8th = 3ʳᵈ Dr .
Foramen
Spinosum
Carotid Canal
.
Foramen lace
rum
Tnt Acoustic
.
Meatus -
Gv = 7 & 8 .
av=sstʰ
Jugular foramen
au 9,10 &
descending position of
- =
.
Hypoglossal canal au 12th
-
=
.
Foramen
Magnum .
-
Ascending Portion
of an -
- 12ᵗʰ .
, I
Olfactory nerve
•
1ˢᵗ cranial Nerve ☆ Anatomical course .
shortest Transmit smell Nasal to
from epithelium primary Olfactory
•
c. N .
•
cortex .
Derived
from olfactory Pta code
•
.
the
Special visceral
afferent column
Originate in
receptors of olfactory epithelium pass through olfactory
•
•
,
.
(
Types :
sensory foramina cribriform plate ending
) at
olfactory bulbs
•
.
.
•
Functn : Smell .
Smell
Specific Sensory info ?
•
:
Optic nerve
2
• 2ⁿᵈ cranial Nerve .
Fibers
• Derived
from Optic placate Btoodsupphf
Developed from optic
• visual
afferent fibers Transmit visual
:
ophthalmic Branch
of
• vesicle as Eat ,
•
Info from Retina lateral geniculate body
to
post central retinal
continuation
of forebrain
direct
ciliary
.
a a. a.
,
.
pupillary off fibers Regulate pupillary light reflex
• :
Type Sensory
.
.
• :
Efferent fibers Unknown funn
:
•
punt
:
.
• vision .
•
Only PNS nerve which is not
•
photostatic fibers visual body reflexes
: .
Spared by Multiple sclerosis .
