Everyone who studies medicine knows that the knee-jerk reflex is one of the simplest types of nerve reflexes, involving only two neurons: sensory neurons and motor neurons.
Thud!
After the small hammer hit the stimulus point on the knee, the child's left leg bounced upward.
Zhou Can's face immediately showed a look of joy.
The nerve center for the knee-jerk reflex is a lower-level nerve center, located within the gray matter of the spinal cord. However, while completing the knee-jerk reflex, the nerve in the spinal cord that connects to the brain will transmit this nerve impulse to the brain, making one feel the knee being tapped, thus causing the leg to perform a bouncing action.
This child's body has high paraplegia, which means the nerves below the head and neck are theoretically blocked.
Zhou Can has now used a simple test to prove that the nerve center in the lower limbs is not interrupted with the brain, indicating that there is hope for treating this child.
