Xu Yao was confused, as he had never heard of such professional terms.

Lin Yalin began to explain carefully, "What it means is that when people are under stress, they will activate the sympathetic nervous system and secrete cortisol and catecholamines to suppress parasympathetic nervous activity (such as suppressing the activities of the digestive and immune systems) to ensure that the body has more energy to deal with the sudden situation.

When this activation state passes, the parasympathetic nervous system restarts, trying to calm the body's reactions and restart the digestive and immune systems.

However, if the previous sympathetic nervous system was overactivated, the parasympathetic nervous system may An excessive rebound reaction occurs. Under normal circumstances, this rebound reaction may cause gastric ulcers, headaches, fever, etc.

When a person's fear of death exceeds the stress conditions that ordinary people have to face, the parasympathetic nervous system rebound is also very strong, and may be over-sedated (such as excessive attempts to slow down the heartbeat, causing cardiac arrest, etc.), ultimately leading to body death. "

After listening to this, Xu Yao immediately said: "Then I can be more sure that my inference is correct.

Sister Ya, you are right, Chen Xinhua was indeed frightened to death, and she was frightened to death by herself."

"What do you mean?" Lin Yalin was completely confused.

"In the past, a doctor of medicine, Bernard Lown, conducted an experiment. A doctor, Dennis Coon, also mentioned the experiment in his book "Essentials of Psychology: Exploration and Application", which is a psychology textbook. So it seems that this experiment is very likely to have really happened. It

is said that the experiment took place in India in 1936. At that time, there was no experimental policy to protect human rights, so the experiment was at least possible. The subject of the experiment was a death row prisoner who was given the opportunity to choose between death by excessive bleeding and hanging. The death row prisoner chose the former, and this is the process of obtaining the experimental subject. During the experiment, the death row prisoner was tied to the bed and blindfolded. The experimental scientists made the death row inmate believe that the water dripping next to him was actually his own blood. Since the inmate couldn't see it, he naturally couldn't verify it. The result of the experiment was that after a period of time, the experimental subject really died. "

After hearing this, Lin Yalin was shocked and understood it at the same time.

"Xu Yao, what you mean is that the murderer imitated the murder method of this experiment. No wonder he (she) blindfolded Chen Xinhua so that he could not see and could only judge by his ears.

But you also mentioned at the beginning that you wanted to use the sound of dripping water to simulate the sound of your own blood dripping. But there is no such equipment in the room."

Xu Yao smiled and said: "This kind of dripping water sound does not actually have to be played by turning on the faucet next to you. A tape recorder can be used instead.

And the room where Chen Xinhua died was very quiet outside. Any sound would be infinitely amplified and heard clearly. At the same time, Chen Xinhua himself was very afraid of death.

In addition, the murderer deliberately took a sharp knife and The thin slice deliberately cut a line on his hand, and the pain was so strong that he could feel that his hand was cut.

In addition, Chen Xinhua was tied up and blindfolded, and he listened to the beeping sound of the recorder. This made him more certain that his blood was being released bit by bit.

As a result, the symptoms you showed during the autopsy appeared, and he was scared to death by his own fear. "

Lin Yalin couldn't help but sigh, "Oh my God, this is simply a genius. He can think of such a method."

Xu Yao explained: He did this to confuse the police and not find the real cause of death. This made the murder case more weird and terrifying.

So many people believed that there were ghosts at work. "

Lin Yalin couldn't believe it. "I heard that Chen Xinhua was killed by Chen Xinhua, right? Then isn't she mentally ill? How could she have such a high IQ? How

many books did she read back then? This kind of experiment seems to only appear in foreign books."

Xu Yao's eyebrows gradually wrinkled deeper and deeper. I can be sure that Chen Xinhua can't reach this level. This kind of book can only be read by highly educated people who are engaged in psychology or who like this kind of books.

Or they are very keen on reading suspense detective novels, but Chen Xinhua is obviously not one of them.

So among the relatives of the Chen family, are there any who meet these conditions?

Lin Yalin smacked her lips, "Then you say, if a master's degree in medicine would also know? It seems that someone meets this condition."

Xu Yao suddenly realized, "You reminded me. Du Xueming, the husband of Chen Lao's third daughter, is a master of medicine and is now a doctor. He usually likes to read suspense detective novels."

Lin Yalin spread her hands, "I don't know about this, this should be It belongs to your category."

Xu Yao suddenly hugged Lin Yalin with both hands excitedly and patted her shoulder, "Sister Ya, thank you so much."

Lin Yalin took a few steps back in panic, "No, no, don't be so intimate. If Mo Xiaoqing sees it, there will be misunderstanding."

When Xu Yao heard Mo Xiaoqing's words, the light on his face disappeared instantly, "Sister Ya, we broke up, you must know it."

"Really, you can't bear to do that?!"

Xu Yao couldn't help but took out a cigarette from his pocket and threw it into his mouth. When he was about to turn on the lighter to light it, Lin Yalin quickly took out his cigarette.

"You know? Smoking is harmful to health. Didn't you quit smoking successfully? Why are you smoking again?"

"Sister Ya, please don't worry about me. I'm very upset." Xu Yao still took out another cigarette and lit it.

Lin Yalin just smiled and said nothing. Her heart was like a beacon.

Needless to say, she was trapped in love, with a face full of bitterness and hatred after a breakup. Only Xu Yao himself didn't know.

He was reluctant to give up, but he still wanted to protect his damn self-esteem.

Lin Yalin said, "Hey, I can't control your affairs. I still hold the same principles as before and don't think you two are a good match. Break up, but I still want to say something fair.

Break up, but don't misunderstand that girl. She didn't lie to you. At that time, she really thought Li Tianfeng was you. Because she took a hallucinogenic aphrodisiac that night."