I can extract side effects.

Chapter 603 Regeneration of Severed Limbs, Hands Follow Your Heart

Obviously, there is still a big gap between how normal people feel about prosthetics and the real user experience.

So, after everyone tested the function of the bionic arm like a superficial touch.

A special guest arrives at the Neurolab.

"Tang Jian, male, 25 years old, he is Zhu Jun's friend, he was recommended to participate in the functional test of the bionic arm..."

In the testing room, Chen Yiqing introduced the volunteers who came to test.

This is a young man in his early 20s. He looks very energetic. When he walked in, he made a rattling sound.

But after everyone glanced at the empty right trouser leg, they immediately understood where the voice came from.

In addition to the disability of his right leg, his left hand is also missing. The entire hand and forearm disappeared, leaving only the mutilated upper arm and empty sleeves.

Under the eyes of everyone, Tang Jian didn't feel embarrassed, and stood by the side with a smile all the time, listening quietly.

But as he listened, his eyes gradually became erratic, and his thoughts returned to three years ago.

Not long after graduation, a car accident took away his right leg and left hand at the same time.

After being discharged from the hospital, Tang Jian experienced a long period of recuperation at home, proper exercise, and walking slowly with crutches, before he calmly accepted the fact that he became a disabled person.

Three months later, he was fitted with a prosthesis, and after two months of practice, he lost his crutches and learned to walk again.

He installed a skeletal calf prosthesis, weighing only 1.5 kilograms. The socket that wraps the thigh is connected to the sole of the foot by a thin steel pipe, so he can walk normally with shoes on.

Generally speaking, it is relatively light and comfortable. Even though its functions are limited and it can only walk at a slow speed, it does not affect his daily travel.

Unfortunately, hand prosthetics are pretty lackluster compared to the wide variety of fully functional leg prostheses.

Available hand prosthetics have few options, poor functionality, and very low user satisfaction.

These hand prosthetics are designed to be very close to real hands.

Not only does it have a flesh-colored appearance and a tough texture like a bandage, it is very similar to his remaining right hand, and it also simulates skin folds and nails.

Despite its good looks, it is a passive prosthesis whose sole function is to make disabled people look more able-bodied.

There's absolutely no way to type or raise a glass, and it's not waterproof.

After only one day of trial, Tang Jian gave up the hand prosthesis.

This thing is not as useful as his half-stumped limb. It is a burden to wear, and you have to worry about it being damaged due to bumps.

Instead of using this prosthesis, he can flexibly use his residual limbs, operate on the touch screen, chat and play games with his friends.

As for the bionic smart prosthesis, that thing only exists in foreign news, and no domestic manufacturer has been able to develop it successfully.

After all, human beings have too many hand functions, and hand prosthetics cannot completely compensate for the lost functions of the hands.

Even the most basic holding operation cannot be done.

Therefore, Tang Jian quickly lost all fantasies about his hand prosthesis, and started his life as a one-armed hero with half of his mutilated arm naked.

Since he still has one arm, he has not lost his ability to take care of himself and life is not so difficult.

Unlike people who have lost their arms, they can only use their feet to eat, read, and twist bottle caps.

He even developed a hobby for games, played with Zhu Jun, and played handicapped e-sports games in his spare time.

When the brain-computer interface first appeared, he was also excited about it, thinking that his spring was coming.

However, it was quickly discovered that Sanqing was very cautious in using this device, and only used it for paralyzed patients to assist their lives.

A person like him who still has two limbs and can even dress and type by himself does not meet the clinical requirements at all.

After calming down, Tang Jian can only hope that Sanqing will develop a real bionic prosthesis as soon as possible, so as to save him from the fire and water.

Now that he has a prosthetic, he can stand up, and he can still walk, but it's just usable.

Can't run, can't exercise, the experience is not good, and it can't be compared with real legs.

Because there are no sensors on the prosthesis, he cannot perceive the environment through the prosthesis. He must keep his attention when walking and not use too much or too little force, otherwise it will be difficult to correct these mistakes.

And no matter how good the model is and how fine the craftsmanship is, the same prosthetic cannot always be used.

An unavoidable reality is that the muscles near the residual limb will gradually shrink over time, the prosthetic leg will gradually shorten by one or two centimeters, and the experience of movement will become worse and worse.

After the prosthesis is installed, it needs to be replaced in due course, and he has already done it once.

After changing to a pair of prosthetics, you need someone to guide you to practice walking, and it will take at least a week or so to get used to it.

Not to mention losing a hand, many good jobs closed the door for him.

It is basically impossible to have any good development.

The only thing Tang Jian is lucky about now is that his accident didn't happen until after graduation, and he was not disabled since he was a child, so at least he didn't drag his parents down.

However, things soon took a turn for the better.

He still remembered that Zhu Jun excitedly called him two days ago.

"Xiaojian, are you interested in participating in Sanqing's bionic hand function test?"

Seeing the good news falling from the sky, he immediately agreed without asking what he wanted to do.

This led to today's trip to the Sanqing headquarters.

Soon, Chen Yiqing finished his introduction and brought him to the workbench.

Tang Jian saw the bionic manipulator placed on the table at first sight, and couldn't help but suffocate.

He was deeply fascinated by the silver-gray metal texture, smooth spraying process, patchwork gradient color, and graceful hand lines.

"Is this the bionic hand prepared for me?" Tang Jian's voice trembled.

"That's right." Chen Yiqing picked up the robotic arm and handed it to him: "What do you think?"

Tang Jian took this bionic hand and admired it fondly, fascinated by its exquisite craftsmanship.

The prosthetic hand is slender in shape, the arms are silver-gray, the fingers are darker in color, and the joints are black. Overall, it is very beautiful, and the gray is very layered.

The bionic palm is closely connected with the power supply and can be removed by rotating.

The palm is full of dense sensors, signal amplifiers, and chip processors.

The power section, which contains the battery, cables, and electrodes, fits snugly into the arm.

The black knuckles are controlled by separate motors, so each finger can move freely without hindrance.

He fiddled with a finger at random, and it was easy to make it do common movements such as flexing and extending fingers.

Accompanied by the movement of the fingers, there was a "buzzing" sound of the motor running, as weak as the humming of a mosquito.

The whole picture was so sci-fi, it instantly gave him an extremely shocking impact.

"Wow, it's so sci-fi. If I put on such an arm, won't I become a Terminator?"

Tang Jian yelled excitedly, his eyes filled with surprise.

"Haha, don't worry. It's still a sample test right now, and when it's actually launched, it will definitely change the color and become the same color as the real one." Wang Dali smiled happily at the side.

This futuristic shape is his hard work, and it is really something to be proud of to be loved by users.

Tang Jian said quickly: "Don't, don't. I just like the Terminator-like design. If it looks like a real hand, it will have no personality at all."

"Ah, please, don't change it. The color of flesh is not good, but metal is better."

Wang Dali scratched his head, thought for a while, and suddenly realized.

"It turns out that you 20-year-olds like such individual designs. No problem, I will make two styles, one for imitation and one for personality, and you can use whichever you like."

"Great. Hehe, I like something with a little more personality. This kind of metal texture and luster, wow, it's really cyberpunk, and it's so handsome."

Tang Jian was instantly overjoyed. The more he looked at this bionic hand, the more he liked it, and he began to imagine himself as a 'Silver Hand Man' in his mind.

"When can I wear it?" he asked impatiently.

"Wait a minute, we need to do some checks on you first," Chen Yiqing said with a smile.

"Weight, activity status, residual limb condition, amount of muscle compression, upper arm innervation, etc., all need to be considered to find the best fit for you."

He looked Tang Jian up and down, and his eyes fell on the long sleeves of his shirt.

"You have to change your clothes first. The long sleeves should be replaced with short sleeves, so that both arms are exposed."

"The nerve at the end of your upper arm should have started to atrophy, and you will need some degree of electrical stimulation therapy to wake it up and feel the electrical signal again."

Tang Jian nodded, followed the staff to change into loose shorts and shorts, and then did a detailed body check.

After coming back again, his arm was disinfected and then installed with a bionic arm.

Almost instantly, Tang Jian felt a slight numbness at the end of the stump, like an electrostatic reaction.

He stretched out his other hand excitedly, gently stroking the bionic hand, greedily wanting to experience the long-lost soft touch.

A miracle happened, even without looking at the bionic hand, he still felt someone touching his hand.

But, that's all.

Touching his other hand, how soft it is, whether it is warm, and more details, I can't feel it yet.

"A portion of the nerves in your arm stump have shrunk and are not as developed as normal people, so the reaction will not be so sensitive at first."

Chen Yiqing explained while observing his reaction.

"It takes a period of training to stimulate the remaining nerves through continuous electrical pulses and make them re-sensitized in order to restore full function."

Tang Jian nodded, his heart filled with joy.

He was satisfied that the lost hand could grow back and regain the sense of touch.

The rest is nothing more than training, as long as there is enough time, he will definitely be able to fully recover.

"The tactile nerve feedback has not fully recovered for the time being, but there is no problem with the hand movement."

"The bionic hand has more than 30 different grip modes and gesture positions. Let's start testing with the six basic functions."

The corners of Chen Yiqing's mouth curled up, showing the familiar smile again.

"The first function is grasping," he pulled a hard-boiled egg from his pocket and handed it over.

"Try grasping round or cylindrical objects, like this egg."

Wang Dali watched from the side, and couldn't help complaining: "Chen Bo, are you Doraemon? Why do you always take out weird things from your pockets?"

Chen Yiqing smiled slightly and ignored it.

Tang Jian slowly stretched out his bionic hand, carefully approached the egg in Chen Yiqing's palm, adjusted his strength according to the feedback, and then firmly grasped the egg.

Chen Yiqing withdrew his hand and applauded enthusiastically.

"Good job!"

"Next, try the second function, pinch."

He took out another ballpoint pen from his pocket, put it on the table, and spread his hands.

"Pinch this pen with your thumb and index finger and place it in my hand."

Tang Jian successfully manipulated the bionic hand, picked up the pen and sent it back.

He's getting more proficient now.

These simple operations can be done with just one thought.

It's just that the hand moves with the heart and wants, and it feels no different from my original hand.

Next, Chen Yiqing asked him to try a series of operations such as clamping thin objects, such as badges, holding up a bowl, and typing on the keyboard.

In the end, even made him lift a 5kg briefcase.

Grip, pinch, pinch, hold, press, and lift these six functions have been tested, and all tasks have been completed perfectly.

Everyone is happy with that.

"Very good, this is the end of the test today."

Chen Yiqing smiled and said, "It's almost time to get off work, you can go home and rest, come back tomorrow morning, then we will do further tests."

Tang Jian was a little surprised: "Don't you take off the bionic hand? Are you afraid that I will run away with it and not come back?"

Chen Yiqing shook his head, laughed and said, "What nonsense are you talking about?"

Wang Dali interjected: "Your hand will send back data at regular intervals. If you don't receive instructions, it will automatically shut down and automatically locate."

Tang Jian smiled awkwardly: "I think so, you must have your own way to control it."

He changed back into his clothes and waved goodbye to everyone.

Walking on the road, recalling what he saw and heard today, Tang Jian couldn't help but feel like falling into a dream.

Is all this true?
My hand is back?
He looked down involuntarily.

Even with his hands hanging down, he can still see his distinctive metal left hand.

After a while, passing by a convenience store, he suddenly felt moved and walked in.

He was eager to try it out, wanting to see what it would be like to use this hand in daily life?
There were a variety of goods on the shelves, Tang Jian didn't even look at them, and just picked up a bottle of water.

For some reason, he was thirsty.

When I was in Sanqing, I was so busy that I didn't drink much water.

He grabs the water bottle with his bionic hand, goes to the checkout counter, and passes it over.

"How much is a bottle of water?"

The cashier was a young girl, she couldn't help but froze when she saw his bionic hand.

Tang Jian had some anticipation in his heart, he wanted to know how the other party would feel, and what would he think of him.

In the past, when others saw his mutilated arm, they would look at him with pity.

Now, what would be the reaction to switching to a bionic hand?
The little girl took the water subconsciously, but didn't scan it right away.

Instead, he pointed to his hand and asked in surprise.

"Is this your bionic hand?"

"Yes." Tang Jian nodded, a little surprised.

In the little girl's eyes, he didn't see any pity or disgust.

It was replaced by deep curiosity.

"Wow, it's amazing, so special." The little girl put the water on the counter, stretched her neck, and stared at his hands vigorously.

"Brother, can I touch it? I promise, just touch it." She couldn't help pleading.

Now, in the eyes of the little girl, apart from curiosity, there is also a strong expectation.

Tang Jian lifted up his sleeves, exposing his entire arm, and stretched it out: "Here, just touch it casually."

"Wow! It's so cool!" The little girl covered her mouth and screamed in excitement.

She stretched out her hand cautiously, touched the back of the bionic hand a few times, and touched the palm and arm in turn.

The expression on his face was excited, shocked, and with a hint of longing.

"Brother, can I take a picture?" The little girl looked at him timidly, blinked, and her eyes were full of expectation again.

"Yes. You can shoot a video." Tang Jian said generously. It is rare to meet someone who can appreciate it. He wants to share his joy with him.

"Brother, you are so kind, I invite you for this bottle of water."

The little girl screamed again, quickly scanned the QR code to check out, and handed over the water before Tang Jian could react.

Then immediately took out the phone, turned on the camera, and pointed it firmly at his hand.

Tang Jian chuckled, stretched out his bionic hand, grabbed the bottle first, and picked it up.

Then pass it to the other hand.

Then twist the bottle cap with the bionic hand, and unscrew the water bottle very easily.

The moment he unscrewed it, he couldn't help but sigh in his heart.

It is good to have healthy hands. If it were changed to before, he would have to clamp the water bottle with his thighs first, and use both hands on the bottle cap to unscrew it.

Not to mention whether you are tired or not, just talking about this posture is very unsightly.

It's as easy as it is now.

Then, he raised his silver-gray bionic hand and waved goodbye to the little girl.

"Beauty, thank you for the water. Goodbye!"

Turning around, he strode out.

(End of this chapter)