ATI RN
Questions About Nervous System Questions
Question 1 of 5
Which of the following about the facial nerve is incorrect?
Correct Answer: B
Rationale: The facial nerve (CN VII) doesn’t supply the ciliary ganglion (CN III does via parasympathetic fibers). It supplies facial muscles, buccinator, taste (anterior 2/3 tongue), and the greater petrosal nerve.
Question 2 of 5
The midbrain
Correct Answer: D
Rationale: The midbrain contains oculomotor (CN III) nuclei, lying between the pons and diencephalon in the posterior cranial fossa.
Question 3 of 5
Regarding the blood supply of the cerebral cortex
Correct Answer: B
Rationale: The anterior cerebral artery supplies the medial cortex (contralateral leg, micturition/defecation areas). Middle cerebral supplies lateral cortex (arm, face, speech).
Question 4 of 5
Regarding anterior nerve roots
Correct Answer: B
Rationale: Anterior roots contain efferent motor fibers and some sympathetic fibers (T1-L2), joining posterior roots at the spinal nerve.
Question 5 of 5
Acetylcholine is a neurotransmitter that provides for communication between muscles and nerves. When there is a problem with the interaction between acetylcholine and the acetylcholine receptor sites on the muscles, which condition(s) can occur?
Correct Answer: D
Rationale: Myasthenia gravis (autoimmune attack on acetylcholine receptors) and botulism (toxin blocks acetylcholine release) both involve acetylcholine dysfunction at the neuromuscular junction. Multiple sclerosis affects CNS myelin, not this interaction, so 'A and B' is correct.