ADVANCED PATHO NEURO QUESTIONS WITH DETAILED
VERIFIED AND 100% ACCURATE ANSWERS
Cranial Nerve I Correct Answers Olfactory (smell)
Fxn: Sensory, carries impulses for sense and smell
Sign of Dysfunction: loss or disturbance in the sense of smell
Cranial Nerve II Correct Answers Optic (Sight)
Fxn: Sensory, carries impulses for vision
s/dysfxn: decreased visual acuity and contrast sensitivity, impaired color
vision, and an afferent pupillary defect (blindness)
Cranial Nerve III Correct Answers Oculomotor
Fxn: Contains motor fibers to interior oblique and to superior, inferior,
ad medial rectus, extraocular muscles that direct eye ball; levator
muscles of eyelid; smooth muscles of iris and ciliary body; and
proprioception (sensory) to brain from extraocular muscles
s/dysfxn: drooping of the eyelid, eyeball moves outward, dilation of the
pupil, double vision
Cranial Nerve IV Correct Answers Trochlear
Fxn: propioceptor and motor fibers for superior oblique muscle of eye
(extraocular muscles)
S/dysfxn: Rotation of eyeball upwarad and outward, double vision
,Cranial Nerve V Correct Answers Trigeminal (facial muscles including
chewing, facial sensation)
- largest cranial nerve
Fxn: Both motor and sensory for face; conducts sensory impulses from
mouth, nose, surface of eyes, and dura mater; also contains motor fibers
that stimulate chewing muscles
S/dysfxn: Sensory root - pain or loss of sensation in the face, forehead,
temple, and eyes
Motor root- affecting the jaw, trouble chewing
Cranial Nerve VI Correct Answers Abducens (moves eyeballs)
fxn: moves the eyeballs outwards by sending nerve impulses to the
lateral rectus muscles
S/Dysfxn: Deviation of the eyes outward; double vision
Cranial Nerve VII Correct Answers Facial (taste, tears, saliva, and facial
expressions)
Fxn: mixed: 1. supplies motor fibers to muscles of facial expression and
to teh lacrimal and salivary glands 2. carries sensory fibers from taste
buds of anterior part of the tongue
S/dysfxn: Paralysis of all the muscles in one side of the face, inability to
wrinkle the forehead, close the eye, whistle, deviation of the mouth,
Bell's Palsy
Cranial Nerve VIII Correct Answers Vestibulocochlear
(acoustic/auditory)
, Fxn: purely sensory; vestibular branch transmits impulses for sense of
equilibrium, cocholear branch transmits impulses for sense of hearing
S/dyfxn: deafness or ringing in the ears, dizziness, n/v
Cranial Nerve IX Correct Answers Glossopharyngeal (swallowing,
saliva, taste)
Fxn: Mixed: 1. motor fibers serve pharynx and salivary glands 2.
sensory fibers carry impulses from pharynx, posterior tongue, and
pressure receptor of carotid artery (blood pressure)
S/Dysfxn: Disturbance of taste; difficulty in swalllowing
Cranial Nerve X Correct Answers Vagus (Control of PNS; smooth
muscles of GI tract)
Fxn: sensor and motor impulses for pharynx; a large part of this nerve is
parasympathetic motor fibers, which supply smooth muscles of
abdominal organs
S/dysfxn: Hoarseness and difficulty in swallowing and talking
Cranial Nerve XI Correct Answers Spinal Accessory (moving of head
and shoulders, swallowing)
Fxn: Provides sensory and motor fibers for sternocleidomastoid and
trapezius muscles (movement of head and shoulders) and muscles of
soft palate, pharynx, and larynx (swallowing)
S/dyfxn: dropping of the shoulder, inability to rotate the head away from
affected area
VERIFIED AND 100% ACCURATE ANSWERS
Cranial Nerve I Correct Answers Olfactory (smell)
Fxn: Sensory, carries impulses for sense and smell
Sign of Dysfunction: loss or disturbance in the sense of smell
Cranial Nerve II Correct Answers Optic (Sight)
Fxn: Sensory, carries impulses for vision
s/dysfxn: decreased visual acuity and contrast sensitivity, impaired color
vision, and an afferent pupillary defect (blindness)
Cranial Nerve III Correct Answers Oculomotor
Fxn: Contains motor fibers to interior oblique and to superior, inferior,
ad medial rectus, extraocular muscles that direct eye ball; levator
muscles of eyelid; smooth muscles of iris and ciliary body; and
proprioception (sensory) to brain from extraocular muscles
s/dysfxn: drooping of the eyelid, eyeball moves outward, dilation of the
pupil, double vision
Cranial Nerve IV Correct Answers Trochlear
Fxn: propioceptor and motor fibers for superior oblique muscle of eye
(extraocular muscles)
S/dysfxn: Rotation of eyeball upwarad and outward, double vision
,Cranial Nerve V Correct Answers Trigeminal (facial muscles including
chewing, facial sensation)
- largest cranial nerve
Fxn: Both motor and sensory for face; conducts sensory impulses from
mouth, nose, surface of eyes, and dura mater; also contains motor fibers
that stimulate chewing muscles
S/dysfxn: Sensory root - pain or loss of sensation in the face, forehead,
temple, and eyes
Motor root- affecting the jaw, trouble chewing
Cranial Nerve VI Correct Answers Abducens (moves eyeballs)
fxn: moves the eyeballs outwards by sending nerve impulses to the
lateral rectus muscles
S/Dysfxn: Deviation of the eyes outward; double vision
Cranial Nerve VII Correct Answers Facial (taste, tears, saliva, and facial
expressions)
Fxn: mixed: 1. supplies motor fibers to muscles of facial expression and
to teh lacrimal and salivary glands 2. carries sensory fibers from taste
buds of anterior part of the tongue
S/dysfxn: Paralysis of all the muscles in one side of the face, inability to
wrinkle the forehead, close the eye, whistle, deviation of the mouth,
Bell's Palsy
Cranial Nerve VIII Correct Answers Vestibulocochlear
(acoustic/auditory)
, Fxn: purely sensory; vestibular branch transmits impulses for sense of
equilibrium, cocholear branch transmits impulses for sense of hearing
S/dyfxn: deafness or ringing in the ears, dizziness, n/v
Cranial Nerve IX Correct Answers Glossopharyngeal (swallowing,
saliva, taste)
Fxn: Mixed: 1. motor fibers serve pharynx and salivary glands 2.
sensory fibers carry impulses from pharynx, posterior tongue, and
pressure receptor of carotid artery (blood pressure)
S/Dysfxn: Disturbance of taste; difficulty in swalllowing
Cranial Nerve X Correct Answers Vagus (Control of PNS; smooth
muscles of GI tract)
Fxn: sensor and motor impulses for pharynx; a large part of this nerve is
parasympathetic motor fibers, which supply smooth muscles of
abdominal organs
S/dysfxn: Hoarseness and difficulty in swallowing and talking
Cranial Nerve XI Correct Answers Spinal Accessory (moving of head
and shoulders, swallowing)
Fxn: Provides sensory and motor fibers for sternocleidomastoid and
trapezius muscles (movement of head and shoulders) and muscles of
soft palate, pharynx, and larynx (swallowing)
S/dyfxn: dropping of the shoulder, inability to rotate the head away from
affected area
