ATI RN
Pediatric Neurology Questions Questions
Question 1 of 5
The dorsolateral tract of Lissauer carries:
Correct Answer: A
Rationale: pain and temperature . The dorsolateral tract of Lissauer is a small bundle of fibers in the spinal cord where first-order pain and temperature axons (from dorsal root ganglia) travel briefly before synapsing in the dorsal horn (e.g., substantia gelatinosa). These then cross to the lateral spinothalamic tract. Choice B (simple touch) and C (discriminative touch) are carried by dorsal columns. Choice D (conscious proprioception) is via dorsal columns too. Thus, A accurately describLissauers role, making it correct.
Question 2 of 5
Which of the following tracts providafferent information for spinovisual reflexes:
Correct Answer: D
Rationale: Spinotectal. The spinotectal tract providsensory input (e.g., pain, touch) to the superior colliculus for spinovisual reflexes, like orienting head/eyto stimuli. Choice A (anterior spinothalamic) is for crude touch to thalamus. Choice B (lateral spinothalamic) is for pain/temperature. Choice C (posterior spinocerebellar) is for unconscious proprioception. Thus, D correctly identifithe spinotectal tract, making it the right answer.
Question 3 of 5
Which of the following tracts has descending autonomic fibers providing a pathway by which the hypothalamus can control the sympathetic and sacral parasympathetic outflow:
Correct Answer: D
Rationale: Reticulospinal tracts. The reticulospinal tracts, from the brainstem reticular formation, include autonomic fibers from the hypothalamus, regulating sympathetic (T1-L2) and parasympathetic (S2-S4) outflow for functions like heart rate and bladder control. Choice A (rubrospinal) is for motor tone. Choice B (tectospinal) is for head reflexes. Choice C (vestibulospinal) is for posture. Thus, D correctly identifithe autonomic role, making it correct.
Question 4 of 5
Which of the following tracts has descending autonomic fiber providing a pathway by which the hypothalamus can control the sympathetic sacral parasympathetic outflow:
Correct Answer: D
Rationale: Reticulospinal tracts. The reticulospinal tracts from the brainstem, influenced by the hypothalamus, regulate autonomic functions like sympathetic (T1-L2) and sacral parasympathetic (S2-S4) outflow. Choice A (rubrospinal) is motor tone. Choice B (tectospinal) is head reflexes. Choice C (vestibulospinal) is posture. Thus, D correctly identifithe autonomic pathway, making it correct.
Question 5 of 5
Regarding Corticospinal tracts choose the WRONG statement:
Correct Answer: D
Rationale: 55% of lateral corticospinal tract fibers synapse in the thoracic region . Most lateral corticospinal fibers synapse in the cervical region (upper limbs), not thoracic (10-20%). Choice A, B, and C are correct (decussation, midbrain, pons path). Thus, D overestimatthoracic synapses, making it the wrong statement and the correct answer.