In the laboratory, a map of the distribution of sensory nerves in the hand appears on the monitor.

"The sensation in the hand is mainly related to three nerves, namely the median nerve, ulnar nerve, and radial nerve."

"The sensory branches of the median nerve are mainly distributed in the thumb, index finger, middle finger, and the half of the palm where these fingers are connected."

"The sensory branches of the ulnar nerve are mainly distributed in the wrist joint, ring finger and little finger, and the connected half of the palm."

"The sensory branches of the radial nerve are distributed in the upper arm, dorsum of the forearm, and dorsum of the hand."

"These three sensory nerves go up along the forearm and upper arm until they merge into the brachial plexus, as shown in the picture."

Three red curves draw across the distribution map in sequence, indicating the direction and distribution of the three nerves.

Chen Yiqing stood in front of the screen, with a look of sincere joy on his face.

"So we only need to convert the hand sensor information at the corresponding part into nerve electrical pulse signals, and transmit them to these three nerves through extremely fine micro-nano electrode needles, so that we can detect the effect of the bionic arm."

Wang Dali smiled proudly and said: "Thanks to another project I have, a painless injection needle that imitates the mouthparts of mosquitoes. It uses a flexible nanometal material. I think it is very suitable for connecting arm nerves."

Electrode needle, so I used it."

"After this kind of nanoelectrode needle is inserted into the human body, it is completely painless and sensationless. Due to its excellent biocompatibility, rejection or infection will not occur."

He picked up a metal piece the size of a thumbnail, which was densely covered with long needles that were thinner than a hair and shone with a silver metallic sheen.

Wang Dali held the long needle and bent it hard, and the long needle fell down like wheat blown by the wind.

He gently let go of his hand, and the long needles were like springs. They brushed and stood straight up, like steel needles on a hedgehog.

"As you can see, this kind of metal is very flexible. It can be straight and bent, and it is not easy to break. There is no blood or any feeling when it is pierced into the arm. After the overall test, the performance is very good, which perfectly meets the needs of our project."

"Hehe, this needle is very good for pricking people, especially after it is powered on, tsk tsk~ The taste must be sour and refreshing!"

Wang Dali thought of the wonderful idea and couldn't help but let out a lewd smile.

Wen Renlong couldn't help but admired: "Awesome, you are so good at it."

Chen Yiqing looked at the two people speechlessly and said expressionlessly: "Since you want to experience it so much, it's hard for me to refuse. The next test subjects have been decided, and it's just you two."

"Ah?" The two of them were confused for a moment: "What kind of test?"

Chen Yiqing smiled slightly: "Of course I got an injection, turned on the electricity, and experienced the feeling of the bionic robotic arm."

Wang Dali was instantly overjoyed: "Chen Bo, you still understand me."

Wen Renlong tilted his mouth at Zhang Li and smiled evilly: "Beauty, I'm here to do experiments with you."

Zhang Li covered her mouth and burst into laughter.

Chen Yiqing covered his forehead with his hands. He really couldn't see anything. He could only cough twice, pretending that the two people were nothing, and then continued talking.

"Thanks to Wang Dali's hard work, the bionic hand has grown out of the liver, and has installed various sensors on the fingers, palm, and back of the hand, such as pressure sensors, temperature sensors, dynamic sensors, etc. Anyway, it is

A lot has been added.”

"Okay, without further ado, let's just look at the test to see how effective it is."

Speaking of this, he couldn't help but show excitement on his face.

Beside the table, a young medical student stood up and opened the small box in front of him with a click.

Then he slowly took out a syringe and looked at Wang Dali and Wen Renlong.

"A shot of lidocaine, injected into the hand during the experiment, can make the hand lose consciousness quickly."

"Who comes first?"

Wang Dali was a little worried: "Your medicinal essence is not accurate? You won't be poisoned by anesthetics, right?"

The medical student chuckled: "Don't worry, I have done accurate tests. If it makes your hands numb, it will never make your legs numb."

Wang Dali curled his lips: "The gap between the hands and legs is a bit big. Now that I have told you, I am even more worried."

"Okay, Dali, where is your bionic arm?" Chen Yiqing quickly interrupted him and asked.

Wang Dali lifted a plastic bag from under the table, opened the layers of tightly wrapped sponges, and revealed a delicate robotic arm inside.

Chen Yiqing couldn't help but twitch the corner of his mouth: "You didn't bring a box to put it in, but just brought it over in a plastic bag. It's too crude. Aren't you afraid of bumps on the road?"

Wang Dali said carelessly: "It's not that far away. Why do you need to do that? It's not a demonstration for customers. It needs to be packaged well."

This bionic robotic arm is made entirely of silver-gray metal. However, compared with before, the entire hand has been sprayed with a thick layer of gel coating. It looks a bit nondescript, but it gives people the impression of a dummy in a clothing store.

perception.

Now, even Zhang Li couldn't stand it anymore: "Brother Wang, are your hands a little rough?"

"Oh, you said these gel coatings mainly imitate the touch of skin, so they feel better."

"It's okay. A rough prototype is called a sample. Let's test the function today. I'll refine it later and make sure everyone is satisfied."

Wang Dali said casually, checked it carefully, pressed lightly on the back of his hand a few times, and then nodded with satisfaction.

"You only have one hand, so how can I do the experiment?" Wen Renlong complained dissatisfied.

Wang Dali glanced at him: "I did this hand, so of course I'll do it first. I'll try it on you before you do it."

Wen Renlong didn't speak anymore, which was regarded as acquiescing to the order of the test.

Soon, an injection of anesthetic was accurately injected on the back of Wang Dali's sterilized hand.

His left hand quickly lost feeling.

Wang Dali poked the back of his hand with his right index finger: "The dosage is okay, I don't feel anything."

He poked his wrist again and cried out in surprise: "Hey, I can still feel it in my wrist. Young man, your technique is good. The numb areas are precise enough."

The medical student smiled slightly, and under Chen Yiqing's guidance, marked the locations of the median nerve, ulnar nerve, and radial nerve on the arm.

Afterwards, a large area of ​​the arm was disinfected, and then three metal pieces the size of fingernails were pointed at the place, and they were inserted gently but forcefully.

The long and fine needle slowly sinks into the arm muscles.

During the whole process, Wang Dali didn't feel much. He only felt as if he had been bitten by mosquitoes a few times.

Immediately afterwards, the neural machine interface cable on the robotic arm was connected to the metal piece.

After doing all this, the medical student took out a black bandage and wrapped it entirely around the place where the needle was inserted into Wang Dali's arm.

This is done mainly for insulation and fixation.

"Okay, the test has officially begun."

Seeing that everything was ready, Chen Yiqing gave an order and turned on the switch of the bionic mechanical arm.

Everyone looked at the table in unison, where the bionic robotic arm and Wang Dali's own hand were placed side by side.

Wang Dali himself was very nervous. He stared at the bionic hand with his eyes wide open, shouting crazily in his head.

"Move, move! Move quickly!"

However, the bionic hand did not move at all.

Chen Yiqing frowned, took out a brush, and gently brushed it on the back of the bionic hand.

"Do you feel it?"

Wang Dali shook his head: "No."

Chen Yiqing put down the brush and pinched the fingers of the bionic hand: "Is it there now?"

Wang Dali looked blank: "Still not."

Chen Yiqing got a little anxious and slapped the bionic hand.

"It should be done by now, right?"

Wang Dali was about to cry: "What's going on? It's still not happening."

Chen Yiqing was completely anxious and punched it with a bang.

"If not, I'll pour a glass of boiling water on your broken hands."

Wang Dali screamed and suddenly burst into tears.

"Nima, the current was so strong just now that it almost gave me electrocution."

Chen Yiqing retracted his hand and said: "I'm sorry, I used too much force."

Wang Dali wiped his tears with his right hand and said with a sad face: "It's all my fault. I used to get electric shocks all the time. This part is a little slow. I didn't even feel the tiny electric current."

Everyone fell silent immediately, never expecting this to be the reason.

Chen Yiqing touched his nose and felt a little embarrassed: "Let's switch to someone else to do the experiment later."

Wang Dali immediately refused: "No, no, I have to experience it myself first before I can make subsequent optimizations."

"Okay, hurry up and continue the test." Chen Yiqing pinched his nose and endured it.

When Wang Dali got used to it, he immediately felt the presence of this bionic hand.

He carefully raised his bionic arm, spread his fingers, and then clenched them into a fist.

I was pleasantly surprised to find that as long as I use my senses and thoughts, I can move my arms to complete any action I want.
To be continued...