It's not that hard to open a hospital in another world, right?

Chapter 261 [Delay Pain] - General anesthesia, local anesthesia, spinal anesthesia!

Known: [see through invisibility] can see the life aura of creatures.

Ask: What is the aura of life?
When it was time to get close to the answer, Gretel calmed down instead.The following verification work requires sufficiently detailed preconditions—even if the preconditions are complete, there are still many students who are just getting started, and the experiment fails, the experiment fails, the experiment fails...

Gretel calmed down and began to tinker with the balance, dropper, beaker and flask.With Ren's solution, the zinc sheet and the copper sheet are welded together at one end to make a zinc-copper bow.Well, it is much more convenient to have magic, directly burn them until they soften, directly join them together, and directly cool them down... Done!
perfect!

Then, Gretel started to cook the frog, nailed it to the board, smashed the brain and spinal cord, and cut off the upper part of the torso...to complete the sciatic nerve-gastrocnemius muscle specimen.The laboratory was full of blood, and the savage grinned when he saw it. Only Gretel remained unchanged from the beginning to the end, and even looked a little excited.

Just kidding, even if medical students are not like their colleagues in biology, they have killed dozens of experimental animals such as frogs, mice, cats and dogs. Who would be afraid of such a scene!
From the beginning to the end, Gretel even maintained meditation, and did not lose his state due to emotional fluctuations.The frog in his hand, under the shroud of [seeing through invisibility], the aura of life flickered silently, and quietly fell into the field of meditation.

What excites Gretel is that even if there is only a spine and the remnants of the frog's legs left, a faint aura of life can still be seen in the meditation field of vision.

So……

Zinc copper bow, dipped in Ren's solution, stimulates the sciatic nerve!

The moment the two ends of the metal plate touched, the frog's gastrocnemius muscle contracted violently.At the same moment, the brightness of the aura of life in Gretel's meditation field of vision jumped up obviously!
That's right!
[Seeing through invisibility] With this magic, the aura you see is most likely bioelectrical fluctuations!

So……

What is the mechanism of action of 【Delay Pain】?
Gretel recalled the contents of the "Physiology" textbook.The principle of human body feeling pain is divided into three steps:
When the body is injured or inflamed, the damaged cells release pain-causing substances, such as potassium, hydrogen, and calcium ions of inorganic salts, serotonin, histamine, and prostaglandins of amines.For example, a large proportion of dysmenorrhea is caused by prostaglandins. Taking ibuprofen in advance can inhibit the production of prostaglandins and achieve pain relief;

Nerve endings are activated by exogenous pain-causing substances or endogenous pain-causing substances to generate receptor potentials, which in turn trigger conductable action potentials and transmit injury information along the nerves to the brain. It can be seen that this process is bioelectricity at work;

The cerebral cortex integrates the pain information, and finally, the human body feels the signal of "pain"——

So, [Delay Pain], which step of the process does it work on?
Gretel decided to try again.This time, according to Mrs. Seat's teaching, he narrowed down the scope of [Delay Pain], narrowed it down, and narrowed it down again.

In the spell model of [Delay Pain], what determines the coverage of the spell is an hourglass-shaped structure.The two ends are not standard cones, but slightly twisted and coiled, with undulating patterns, a bit like ice cream on a cone.

This kind of spell model is not too difficult for Gretel who has experienced in building the meditation shell.Isn't it just distortion, isn't it just pattern, everything is a math problem!

After a series of steps including calculation, building a function model, and adjusting parameters, he has been able to shrink the scope of magic from covering the entire human body to the size of a bowl.

If you want to shrink again, it's not that the parameters can't be adjusted, but that Gretel's mental power and spell control ability can't support it...

Gretel took another frog, nailed it to a wooden board, and sliced ​​across the skin of the leg. 【See through invisibility】! [Delay Pain], target, frog head!
In the meditation field of view, the fluctuation of the aura of life on the frog's head decreased and eased, while the fluctuation of the frog's legs was still strong.Is it that the pain is no longer felt, but the limbs are still twitching spontaneously?It's a pity that he still couldn't learn the part of calming animals in the magic of the natural god religion, and he couldn't connect with the animal's perception.If only Pastor Matthew was here...

Gretel thought for a while, canceled the spell, and threw the second [Delay Pain] at the frog's leg.This time, in the meditation field of view, the aura of life on the frog's legs has calmed down, but the aura on the frog's head is still jumping.No way, Gretel used the traditional immobilization method, the frog had nails on all four of its feet, and it hurt.

Well, that is to say, the [Delay Pain] spell can at least suppress the bioelectric conduction of some pain-sensing nerves within the range covered by the spell...

So, if the nerve is suppressed, is it possible that after the nerve response is cut off, the pain sensation of the extremity is no longer transmitted to the brain?
On impulse, Gretel threw a spell on his thigh.Then, he bent down and pinched his calf hard.

It really doesn't hurt!

Gretel continued his efforts and continued to split the spell model.In this spell, the part that determines the nature of the spell is shaped like a flower. Below the flower are countless coiled roots.Gretel tried to omit the root and cast the spell again...

The frog struggled violently.However, when the spell was thrown on the frog's head, the frog immediately calmed down, and the aura of life on the head also eased, and the fluctuations were no longer violent.And omit the part of the flowers, directly outline the roots, and cast the spell again——

Effective for the limbs, not for the head!
interesting.Gretel's eyes were shining, and he recorded quickly, so the "flower" part is the control center, which prevents the brain from recognizing pain; and the "root" part is the sensory nerve, suppressing bioelectric conduction?

This mechanism is very interesting!

Moreover, after splitting and reducing the range covered by the spell, the mana consumed by this magic has shrunk directly from the second-level magic to the first-level magic.Such changes are of course not very useful in battle. The smaller the coverage area, the lower the possibility of hitting. If there are many wounds on the body, it is even more useless-it can block here, but not there...

However, medically, it is so useful!

It's numb!

Can local anesthesia, why general anesthesia!

It is possible to numb the waist, but there is no need for general anesthesia!

A waste of anesthetic, ah no, a waste of mana, and it also affects the patient's recovery!
Tomorrow, just tomorrow, go to the treatment room and try it out!If there is no suitable patient in the treatment center, you can still go to the dock, go to the fleet, the porters and soldiers there, there are many daily bumps and bumps, and you will definitely find opportunities!
　Thanks to @爱赛拉市车的奥妮 for the reward of 1500 starting coins

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(End of this chapter)