Which cranial nerve is assessed by using the Snellen visual acuity chart?
Abducens cranial nerve (CN V).
Optic cranial nerve (CN I).
Trochlear cranial nerve (CN VI).
Oculomotor cranial nerve (CN II).
The Correct Answer is D
Choice A rationale
The abducens cranial nerve (CN VI) controls the lateral rectus muscle of the eye, which is responsible for outward movement. It is not assessed using the Snellen visual acuity chart. The function of this nerve is tested through the evaluation of lateral eye movements.
Choice B rationale
The optic cranial nerve (CN II) is responsible for vision, including visual acuity and visual fields. It is assessed using the Snellen visual acuity chart to determine how well a person can see at various distances. This test evaluates the clarity and sharpness of vision, making CN II the correct answer.
Choice C rationale
The trochlear cranial nerve (CN IV) controls the superior oblique muscle, which helps with downward and inward eye movements. It is not assessed using the Snellen visual acuity chart but rather through the evaluation of eye movements and alignment.
Choice D rationale
The oculomotor cranial nerve (CN III) controls most of the eye's movements, including those of the superior, inferior, and medial rectus muscles, as well as the inferior oblique muscle. It is also responsible for controlling the pupil's response to light. The Snellen visual acuity chart does not assess the function of CN III, as it focuses on visual clarity and acuity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
"C" in the ABCDE criteria for assessing skin lesions stands for Color. This criterion refers to the variations in the color of the lesion, which could include shades of black, brown, tan, or even white, red, or blue. Uneven or multiple colors within a single lesion can be a warning sign of melanoma, a type of skin cancer. Regularly checking the color of moles or spots on the skin is crucial for early detection of potential malignancies.
Choice B rationale
Characteristics are not part of the ABCDE criteria. The ABCDE criteria specifically stand for Asymmetry, Border, Color, Diameter, and Evolving. These criteria are used by healthcare professionals to identify suspicious skin lesions that may need further evaluation or biopsy to rule out skin cancer. Focusing on these specific aspects helps in early detection and treatment of malignant skin conditions.
Choice C rationale
Crepitus is a term used to describe a crackling or grating sound or sensation, typically associated with bones or joints, and is not related to skin lesion assessment. Crepitus can be felt or heard in conditions such as arthritis, where the cartilage in the joints has worn away, causing bones to rub against each other. It is unrelated to the ABCDE criteria for skin lesions.
Choice D rationale
Coping methods are strategies used by individuals to manage stress, emotions, or adverse situations and have no relevance to the ABCDE criteria for skin lesions. Coping methods can include techniques like exercise, meditation, or talking to a therapist, but they do not pertain to the physical examination of skin lesions for signs of cancer.
Correct Answer is B
Explanation
Choice A rationale
5th ICS Left MCL is the location for the apical impulse (point of maximal impulse), not Erb's Point.
Choice B rationale
Erb's Point is located at the 3rd ICS Left SB and is significant for auscultation of heart sounds, particularly the S1 and S2 sounds.
Choice C rationale
2nd ICS Left SB is the location for auscultating the pulmonic valve area.
Choice D rationale
4th ICS Left SB is where the tricuspid valve is auscultated.
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