ATI RN
Pediatric Neurology Question Bank Questions
Question 1 of 5
Choose the true statement:
Correct Answer: A
Rationale: The arachnoid mater ends at S2 . The arachnoid mater, along with the dura mater, forms the dural sac, which ends at the S2 level, containing the subarachnoid space with CSF. Choice B is true but not the only correct option, as the spinal cord dohave cervical and lumbosacral enlargements. Choice C is incorrect because CSF is in the subarachnoid space (between arachnoid and pia), not between dura and arachnoid (the subdural space is potential). Choice D is wrong as the bundle of nerve roots below the conus medullaris is the cauda equina, not the conus itself. Since the question asks for a true statement and A is accurate and specific, it is the correct answer.
Question 2 of 5
Regarding disc herniation, all of the following are true EXCEPT:
Correct Answer: A
Rationale: If the disc between L4 / L5 is herniated sensory changwill likely occur at the medial border of leg , which is false. An L4-L5 disc herniation typically affects the L5 nerve root, causing sensory changin the anterolateral leg and dorsum of the foot, not the medial leg (L4 dermatome). Choice B is true (S1 tests tiptoe standing via gastrocnemius). Choice C is correct (L4 compression affects knee jerk). Choice D is accurate (S1 compression weakens gastrocnemius). Thus, A misattributsensory changes, making it the exception and the correct answer.
Question 3 of 5
Which of the following represents the location second order neuron of the lateral spinothalamic tract:
Correct Answer: B
Rationale: Substantia gelatinosa of spinal cord . The lateral spinothalamic tracts second-order neurons are in the substantia gelatinosa (Rexed lamina II) of the spinal cords dorsal horn, where first-order neurons from dorsal root ganglia synapse after crossing via the anterior white commissure. Choice A (thalamus) is the third-order neuron site (VPL). Choice C (dorsal root ganglia) is first-order. Choice D (medulla) is unrelated to this tracts second-order site. Thus, B correctly identifithe location, making it the right answer.
Question 4 of 5
In the dorsal horn-medial lemniscal pathway, the cell bodiof the first, second, and third order neurons are located in, respectively:
Correct Answer: D
Rationale: Dorsal root ganglia, brain stem, diencephalon . In the dorsal column-medial lemniscal pathway: first-order neuron cell bodiare in the dorsal root ganglia (DRG), sensing stimuli; second-order are in the medulla (brainstem, nucleus gracilis/cuneatus), where they decussate; third-order are in the thalamus (diencephalon, VPL), relaying to cortex. Choice A misplacfirst-order (dorsal column is axons). Choice B usvague terms (hindbrain/forebrain). Choice C misnamregions. Thus, D accurately locatthe neurons, making it correct.
Question 5 of 5
The internal arcuate fibers arise from the:
Correct Answer: A
Rationale: gracile and cuneate nuclei . Internal arcuate fibers are axons of second-order neurons in the gracile and cuneate nuclei (medulla) that curve medially, decussate, and form the medial lemniscus in the dorsal column pathway (proprioception, touch). Choice B (solitary nucleus) processtaste/visceral sensation, not touch. Choice C (accessory cuneate) is for unconscious proprioception to cerebellum. Choice D (nucleus dorsalis) is for spinocerebellar tracts. Thus, A correctly identifithe source, making it the right answer.