Aaron consistently exhibits a knee-jerk response without having any sensations of the taps on his knees.Aaron's experience is most indicative of
A) botulin poisoning.
B) a severed spinal cord.
C) a sympathetic nervous system injury.
D) a refractory period.

Question

Quizplus · Accepted Answer

Aaron's lack of sensation in response to the taps on his knees suggests a disruption in the sensory pathway from his knees to his spinal cord and brain. A severed spinal cord would be the most likely cause of this type of disruption. Botulin poisoning affects motor pathways rather than sensory pathways, and a sympathetic nervous system injury would not directly impact the knee-jerk reflex. Refractory periods are a normal part of neuronal functioning and do not relate to Aaron's lack of sensation.

Aaron Consistently Exhibits a Knee-Jerk Response Without Having Any Sensations