Cranial nerve notes

Cr e-s
( abducent &
Trigeminal )
Abducent Hense :



• It is 6th Cranial Nerve .




•

Purely motor
°


Supplies only muscle
one



lateral rectus ball
-



eye of
.
So named because it abducts the
eye
.




Unique feature :



°
Most susceptible to damage of all cranial nerves
during increased
intracranial pressure
.




Functional components & Nuclei :



(i , General somatic efferent fibres -



Supply lateral rectus muscle .




I
Arise from abducent nucleus in
pons
.




121
GIsomahcaffenntf.ba :
Carry proprioceptive sensations
It
from lateral
rectus .




Terminate in mesencephalic
nucleus
of trigeminal nerve .




Course :



Arises at lower border
of poms
opposite the
pyramid of
medulla .




H
dorsal to Anterior cerebellar
.


Runs
Artery .




I,
Donell o 's Canal
H
Cavernous sinus .




A ,

, Enters the orbit
through superior orbital fissure .




a.
Runs lateral side to enter orbital
surface g

lateral Rectus muscle .




Clinical :




Trigeminal Nerve :



•
It is 5th Cranial Nerve .




°
Mixed Nerve ( both motor &
sensory )
.
Consists n three
large nerves :



(a) Ophthalmic
( bi
Maxillary Coode
cel Mandibular


Unique feathery :



. It is
largest cranial nerve




S located within cranial
Trigeminal cavity
°

n
g nerve in




hay est in
body
°


.