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NURS 5315 Module 7|Dr. Gonzalez,Neuro/Psych Questions and Answers
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NURS 5315 Module 7|Dr.Gonzalez,Neuro/Psych Questions and Answers
Cranial Nerve III Function and sign of dysfunction Correct-Oculomotor
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
Drooping of the eyelid, eyeball moves outward, dilation of the pupil, double vision.
Cranial Nerve IV Function and sign of dysfunction Correct-Trochlear
Propioceptor and motor fibers for superior oblique muscle of eye (extraocular muscles)
Rotation of eyeball upward and outward, double vision
Cranial Nerve I Function and sign of dysfunction Correct-Olfactory
,sensory, carries impulses for sense and smell
Loss or disturbance in the sense of smell
Cranial Nerve II Function and sign of dysfunction Correct-Optic
Sensory, carries impulses for vision
decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent
pupillary defect. (blindness)
Cranial Nerve V Function and sign of dysfunction Correct-Trigenimal
(facial muscles including chewing, facial sensation) This is the largest cranial nerve Both motor
and sensory for face; conducts sensory impulses from mouth, nose, surface of eye, and dura
mater; also contains motor fibers that stimulate chewing muscles
,Sensory root - Pain or loss of sensation in the face, forehead, temple and eyes.
Motor root - affecting the jaw, trouble chewing
Cranial Nerve VI Function and sign of dysfunction Correct-Abducems
Moves the eyeballs outwards by sending nerve impulses to the lateral rectus muscles
Deviation of the eyes outward; double vision
Cranial Nerve VII Function and sign of dysfunction Correct-Facial
(taste, tears, saliva and facial expressions);
Mixed: 1. Supplies motor fibers to muscles of facial expression and to the lacrimal and salivary
glands.
2. Carries sensory fibers from taste buds of anterior part of tongue
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 Function and sign of dysfunction Correct-Vestibulocochlear
(acoustic) auditory: Purely sensory; vestibular branch transmits impulses for sense of
equilibrium, cochlear branch transmits impulses for sense of hearing
Deafness or ringing in the ears, dizziness, nausea and vomiting
Cranial Nerve IX Function and sign of dysfunction Correct-Glossopharyngeal
(swallowing, saliva, taste)
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)
Disturbance of taste; Difficulty in swallowing
Cranial Nerve X Function and sign of dysfunction Correct-Vagus
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