While taking a history, the nurse observes that the patient's facial cranial nerves (CN VII) are intact based on which behaviors of the patient?
The sides of the mouth are symmetric when the patient smiles.
The patient's eyes move to the left, right, up, down, and obliquely during conversation.
The patient's eyelids blink periodically.
The patient moistens the lips with the tongue.
The Correct Answer is A
Choice A rationale
The sides of the mouth being symmetric when the patient smiles indicate intact function of the facial cranial nerve (CN VII). This nerve controls the muscles responsible for facial expressions, including smiling, frowning, and closing the eyes. Symmetry in these actions suggests that the facial nerve is functioning properly and that there is no nerve damage or weakness.
Choice B rationale
The patient's eyes moving to the left, right, up, down, and obliquely during conversation are functions of the oculomotor nerve (CN III), trochlear nerve (CN IV), and abducens nerve (CN VI), not the facial cranial nerve (CN VII). These nerves work together to control the movements of the eye muscles, enabling the eyes to move in different directions and maintain proper alignment.
Choice C rationale
Periodic blinking of the eyelids involves the oculomotor nerve (CN III) and the facial nerve (CN VII). The oculomotor nerve controls the muscles that lift the eyelid, while the facial nerve controls the muscles that close the eyelid. Blinking is a coordinated action involving both nerves, but the observation alone is not sufficient to determine the integrity of CN VII.
Choice D rationale
The patient moistening the lips with the tongue involves the function of the hypoglossal nerve (CN XII), which controls the movements of the tongue. The hypoglossal nerve is responsible for the motor control of most of the tongue muscles, allowing for actions like licking the lips, speaking, and swallowing. It is not related to the facial cranial nerve (CN VII).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
While individuals aged 19 to 30 years are generally at a lower risk for malignant melanoma compared to older adults, melanoma can still occur at any age, especially with certain risk factors. However, age alone does not significantly increase the risk of developing malignant melanoma without additional risk factors.
Choice B rationale
Hair color has minimal impact on the risk of developing malignant melanoma. Although individuals with fair skin and light hair have a higher risk of sunburn and subsequent melanoma, having dark hair does not significantly reduce the risk compared to other factors.
Choice C rationale
Female gender does not inherently increase the risk of developing malignant melanoma. Both males and females are at risk, although certain lifestyle factors and behaviors, such as sun exposure, can influence individual risk levels regardless of gender.
Choice D rationale
A history of repeated sunburn significantly increases the risk of developing malignant melanoma. Ultraviolet (UV) radiation from sunburns causes DNA damage in skin cells, leading to mutations that can result in melanoma. Repeated sunburns exacerbate this risk, making it a critical factor in melanoma development.
Correct Answer is B
Explanation
Choice A rationale
Lateralization to the unaffected ear in Weber's test actually indicates sensorineural hearing loss in the affected ear. This choice is incorrect as it doesn’t describe the correct procedure for the test.
Choice B rationale
The Weber's test involves placing an activated tuning fork in the midline of the skull and asking the patient if the sound is heard more loudly in either ear. This helps determine if there is lateralization, which is key in diagnosing the type of hearing loss. Thus, this is the correct procedure for the test.
Choice C rationale
Placing the tuning fork on the mastoid bone and then over air is actually part of the Rinne test, not the Weber test. This choice is, therefore, incorrect for the Weber test.
Choice D rationale
Similar to Choice C, this process describes the Rinne test, which compares air conduction and bone conduction of sound. This is not the correct method for performing Weber’s test.
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