When measuring a patient's visual acuity, the nurse is assessing which cranial nerve?
I
II
IV
III
The Correct Answer is B
A. I: Cranial nerve I, the olfactory nerve, is responsible for the sense of smell and is not involved in visual acuity; it can be tested by asking the patient to identify familiar scents.
B. II: Cranial nerve II, the optic nerve, is responsible for transmitting visual information from the retina to the brain. It is directly involved in measuring visual acuity, as it enables the nurse to assess how well the patient can see and interpret visual stimuli; visual acuity is commonly tested using the Snellen chart.
C. IV: Cranial nerve IV, the trochlear nerve, controls the superior oblique muscle, which is responsible for downward and lateral eye movement. It can be assessed by having the patient follow an object in a downward diagonal direction.
D. III: Cranial nerve III, the oculomotor nerve, controls most of the eye's movements, including constriction of the pupil and maintaining an open eyelid. It is assessed by evaluating the patient's ability to follow objects in all directions and checking for pupil response to light and accommodation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Maxillary sinuses reach full size after puberty: While maxillary sinuses continue to grow throughout childhood, they are present at birth and reach adult size during late adolescence. The frontal and sphenoid sinuses, rather than the maxillary, experience more significant postnatal development.
B. Maxillary and ethmoid sinuses are the only sinuses present at birth: At birth, only the maxillary and ethmoid sinuses are developed. The frontal and sphenoid sinuses begin to develop later in infancy and childhood, with full maturation occurring in adolescence.
C. Frontal sinuses are fairly well developed at birth: Frontal sinuses do not develop until around 7 to 8 years of age and continue growing into adolescence. They are absent or rudimentary in newborns.
D. Sphenoid sinuses are full size at birth: The sphenoid sinuses begin developing around 2 to 3 years of age and continue growing into late childhood and adolescence. They are not present at birth.
Correct Answer is A
Explanation
A. An otitis media: A bright red tympanic membrane with an abnormal light reflex suggests inflammation and infection of the middle ear, characteristic of otitis media. Young children are particularly susceptible due to their shorter and more horizontal eustachian tubes, which facilitate bacterial or viral entry. Symptoms such as ear pulling, irritability, and fever often accompany the condition.
B. Cholesteatoma: Cholesteatoma is an abnormal skin growth in the middle ear that may result from chronic infections. It typically presents with a foul-smelling discharge, conductive hearing loss, and a white or pearly mass on the tympanic membrane rather than generalized redness.
C. A fungal infection: Fungal infections (otomycosis) usually present as black or white spots on the tympanic membrane or ear canal rather than diffuse redness. The condition often causes itching and mild discomfort rather than acute pain and fever.
D. A perforation of the eardrum: A perforation would likely present with a visible tear or hole in the tympanic membrane, often accompanied by drainage. While infections like otitis media can lead to perforation, the findings described in the question suggest inflammation rather than rupture.
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