Download CN3 CN4 CN6 CN3 CN3 CN3 I. Olfactory (S) II. Optic (S) III

I
V
I
II
III
X
I
II
Ooh
Ooh
Ooh
To
Touch
And
Feel
Very
Green
Vegs
A(h)
H
S = sensory
Olfactory
M = motor
Optic
B = both
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
Accessory (spinal)
Hypoglossal
CN3
(S)ome
(S)ay
(M)arry
(M)oney
(B)ut
(M)y
(B)rother
(S)ays
(B)ig
(B)rains
(M)atter
(M)ore
Superior
Rectus
CN3
Medial
Rectus
Inferior
Oblique
CN3
Lateral
Rectus
Inferior
Rectus
Superior
Oblique
Anosmia
-loss of smell
-often can still smell “painful” stimuli
like ammonia
CN6
CN4
Blindness in eye on affected
side (mimicked by closing
an eye)
I. Olfactory (S)
CN3
-smell
left CN II lesion
II. Optic (S)
right CN II lesion
- sight
III. Oculomotor (M)
-sensorineural deafness
-balance problems
-may be diminished by
adaptation if onset is slow
-difficulty
swallowing
-lack of taste
in post. 1/3
of tongue
-uvula
deviates
away from
lesion
a. 4 of 6 eye muscles
-inferior oblique
-superior rectus
-medial rectus
-inferior rectus
b. constriction of iris (PS)
c. upper eyelid
VIII. Vestibulocochlear (S)
-balance and hearing
IX. Glossopharyngeal (B)
right CN III lesion
-(S) taste of post. 1/3 of tongue
-(M) pharynx
-(M) salivation (PS)
IV. Trochlear (M)
-superior oblique
X. Vagus (B)
-if a major lesion...death
-minor lesions
- nasal speech
- lack of taste in throat
- parasympathetic problems
- may impair swallowing
-fixed dilated pupil
-paralysis of eye
-outward deviation of eye
-drooping eyelid
-(S) taste deep in throat
-(M)PS of heart, lungs,
kidneys, viscera
-(M) pharyx, larynx
(swallowing)
V. Trigeminal (B)
(S) sensation of face
(M) muscles of mastication
VI. Abducens (M)
-weak neck and
back muscles
-may impair
swallowing
- pharynx, larynx
(swallowing)
- sternocleidomastoid
-trapezius
- numbness of face
(dyasthesia)
-paralysis and deviation
of the jaw to the side
of the lesion
-cannot look laterally
-eye deviates medially
-lateral rectus
XI. Spinal Accessory (M)
XII. Hypoglossal (M)
right CN XI lesion
(note the lack of tone on the right
and the shoulder droops slightly))
Try to group CNs by function. Which nerves together serve...
Taste ______________
Others?
PS function ______________
Eye movement ______________
Swallowing ______________
-weak down and out vision
-head tilt
-doublevision
- tongue weakness
- tongue protrudes to
the side of the lesion
-difficulty swallowing
(try to hold your
right CN VI lesion
VII. Facial (B)
- intrinsic tongue muscles
- shape tongue
- extrinsic tongue
- moves tongue
-(S) taste of ant. 2/3
of tongue
-(M) facial expressions
-(M) glands (PS)
-left CN XII
lesion
-facial weakness
-emotion is not voluntary
so face may move with surprise
-lack of taste in ant. 2/3 of tongue
-dry mouth
-Bell’s Palsey
left CN VII (she is attempting to smile