ATI LPN
Medical-Surgical Nursing Neurological System Questions
Question 1 of 5
Which of the following best describes an expanded tip tactile receptor found in the dermis of hairy skin that is specialized to detect continuously applied touch sensation?
Correct Answer: B
Rationale: Merkel discs are slow-adapting, expanded tip receptors in hairy skin dermis, detecting continuous touch. TMP13 p. 608
Question 2 of 5
Which body part is represented superiorly and medically within the postcentral gyrus?
Correct Answer: B
Rationale: The lower limb is represented superiorly and medially in the postcentral gyrus somatosensory map. TMP13 p. 612
Question 3 of 5
Which somatosensory deficit is NOT typically seen after the development of lesions that involve the postcentral gyrus?
Correct Answer: D
Rationale: Postcentral gyrus lesions impair sensation, not motor function (precentral gyrus). TMP13 p. 613
Question 4 of 5
A 10-year-old boy looks at ants through a magnifying glass. He finds that the ants must be 10 centimeters from the convex lens to be in focus. Which value best describes the refractive power of the lens (in diopters)?
Correct Answer: C
Rationale: Refractive power = 1 / focal length (in meters). Focal length = 10 cm = 0.1 m, so 1 / 0.1 = 10 diopters. TMP13 pp. 637-638
Question 5 of 5
A 60-year-old woman visits the ophthalmologist because of eye pain. Tests show that her right eye has an intraocular pressure of 22 mm Hg and her left eye has an intraocular pressure of 25 mm Hg. Which of the following is the most likely cause of eye pain in this woman?
Correct Answer: C
Rationale: Open-angle glaucoma, with increased trabecular meshwork resistance, raises intraocular pressure, causing pain. TMP13 p. 646