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.

Severed Spinal Cord

A complete cut or transection of the spinal cord, resulting in a loss of communication between the brain and the body parts below the injury level, often leading to paralysis.

Knee-Jerk Response

An immediate, automatic reaction to a situation, without taking the time to think through the consequences.

Botulin Poisoning

A serious illness caused by botulinum toxin, which can result in muscle paralysis and is often linked to improperly preserved or canned food.