Which of the following statements regarding brain activity is true?

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Neurological Assessment NCLEX Questions Questions

Question 1 of 5

Which of the following statements regarding brain activity is true?

Correct Answer: D

Rationale: PET and fMRI map brain activity to functions; Gage’s injury was prefrontal, and hemispherectomy/corpus callosotomy patients can survive and function.

Question 2 of 5

Which of the following best describes the waxy-appearing material called myelin:

Correct Answer: D

Rationale: Myelin is a lipid-rich insulating layer around axons, formed by neuroglia (e.g., Schwann cells in PNS, oligodendrocytes in CNS), speeding signal conduction.

Question 3 of 5

Sally has a brain injury; she knows what she wants to say but can't vocalize the words. The part of her brain that deals with the ability to speak is the:

Correct Answer: D

Rationale: Broca’s area in the frontal lobe controls speech production; damage causes expressive aphasia, where comprehension remains but speech is impaired.

Question 4 of 5

From which layer of the embryo does the nervous system form?

Correct Answer: A

Rationale: The nervous system derives from the ectoderm via the neural plate, which forms the neural tube, unlike mesoderm (muscles, bones) or endoderm (gut).

Question 5 of 5

What structures does light pass through before reaching the primary visual cortex? (list in order)

Correct Answer: C

Rationale: Light path: cornea, aqueous humor, lens, vitreous humor, then retina (rods/cones, then ganglion cells), optic nerve, LGN, to V1; C is closest despite missing cornea.

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