Next to the machine tool, Li Liang sat on a chair. Cain held a black plastic plate and placed it vertically between Li Liang's eyes, dividing his field of vision into two halves.
Dr. Sisson stood in front of him and quickly flashed a picture across his right field of vision.
"What do you see?"
Although he thought this "experiment" was ridiculous, he still answered truthfully, "Spoon."
Then, Dr. Sisen quickly flashed a picture across his left field of vision.
"What did you see?"
Li Liang frowned and said nothing.
"Huh? Don't make trouble, Li Liang," Cain laughed subconsciously.
Dr. Sisson looked serious.
However.
Li Liang raised his eyebrows and said, "What's the fuss about? I didn't see anything."
"..."
Cain removed the plastic board, grabbed Dr. Sisson's hand and raised the painting, "Spoon, or spoon, how could you not see it?"
Li Liang was stunned.
There is indeed Cain's hand-painted spoon on the cardboard, which is crooked.
However, he really felt like he didn't see anything just now.
"Don't worry," Dr. Xisen smiled, "It's not like he didn't see it. Let's do another experiment."
Li Liang nodded palely.
"Next, I will show you a number. Before you answer with your mouth, draw it with your hands."
"good."
Xisen gave a wink, Cain nodded, and repositioned the plastic plate upright, separating Li Liang's left and right vision.
Dr. Xisen quickly passed Li Liang's right field of vision with the cardboard he had prepared.
next moment.
Li Liang raised his left hand, wrote a 6 in the air, and then blinked blankly.
"How many?" Cain's eyes widened.
"What number?" Li Liang swallowed, "Has it started yet? I didn't see anything..."
Cain looked in disbelief.
"Try again," Dr. Xisen took out the cardboard he had prepared and handed it to Li Liang. "I will show you a picture in a while. You draw it."
"good."
Dr. Xisen flashed a picture across Li Liangyou's right field of vision.
Cold sweat broke out on his forehead. Li Liang quickly drew a rectangle with his left hand, and then said in a daze, "I didn't see anything."
"How is it possible," Cain said, going crazy, "you fucking drew it all!"
"..."
The plastic board was removed. Li Liang raised the cardboard in his hand and saw a rectangle drawn on it.
Dr. Xisen pulled a chair and sat down, and said solemnly, "This is a split-brain person. There are two fiber pathways connecting the left and right brains, that is, the anterior commissure and the corpus callosum are severed. From the scan just now, you have a corpus callosum." , that is, the transverse nerve fiber bundles are diseased and appear very suspicious and shadowed."
"Then, why don't I feel it usually?" Li Liang finally knew why he sometimes didn't remember how to use the double-ring ring when using the flying sword, and why he forgot the Taoist techniques when using magic.
It turns out that the brain is really split.
Cain stretched out his hand and knocked on his head, wondering, "Yes, the left and right heads are decoupled, how can he still act like a normal person?"
"It's not completely disconnected," Dr. Xisen said with a relaxed expression. "The left and right hemispheres are still connected to the same brainstem, maintaining similar arousal levels, falling asleep and waking up at the same time, and the subcortical pathways remain intact. The hemispheres of the brain receive somatic sensory information and proprioceptive information about spatial location in the same way."
The old man stood up and walked behind Li Liang, gesturing with his hand that he had a head and said
"The optic nerve is divided into two halves at the visual intersection, causing the left visual field to enter the right brain, and the right visual field to enter the left brain. If the left and right brains are disconnected, then unilateral visual information cannot be transmitted from one half of the brain to the other.
The language center is in the left hemisphere of the brain, so if we show the picture to the right eye, Li Liang can tell that he saw the spoon, but when shown to the left eye, the left eye actually saw the spoon and told the right brain, but the right brain cannot There is a language center that transmits information to the left brain, so he can't speak it..."
"But it's drawn..." Cain questioned.
"Yes, because both the left and right brains can think and control motor nerves independently. The left brain controls the right hand, and the right brain controls the left hand. However, even if the motor nerves are controlled equally, there is no direct pathway between the two sides of the brain, but neuron signal transmission is required. , Under experimental conditions, you will find that one side of the brain receives the command, and the other side has motor nerves that will respond with delay.
For example, if we show a joke to the left brain, when a person smiles, the right facial muscles will respond faster than the left facial muscles, and the delay can reach about 180 milliseconds. "
Li Liang still found it difficult to accept that "the left and right brains process information separately, what should we do if we fight?"
"No," Dr. Xisen waved his hand. "Split-brain will not affect normal life, because we have discovered that the brain is not strictly divided into different functional areas like computers in ancient times, but is a set of multiple subsystems with dynamic functions. Collaboration system, although the functions of the left and right brains have tendencies, they do not represent two sets of human consciousness. This structure is to enhance the response speed. When I was thirty, I sometimes based on this principle, the core of the bionic human has the underlying logical response speed. An increase of at least 70 percent.”
Li Liang nodded and asked, "What's the difference between the left and right brains?"
"It's interesting. The right hemisphere is very bad at reasoning and being rigid. The left hemisphere is good at divergent thinking. The right hemisphere has a hard time understanding language. The left hemisphere controls the language center, etc. In general, the right hemisphere seems to be better. A bit dumber, but focusing on the essence of things, which is closely related to cognitive ability. The left brain specializes in language and creative association, which is related to IQ." Speaking of the magic of the brain, Dr. Sisen was very interested, "But you don't have to worry, split brain In fact, it does not affect your life. Under normal circumstances, when you have sense organs and receive signals, they will be transmitted to both hemispheres of the brain at the same time. It will not be like the experiment just now, where you can only see things with one eye."
Li Liang nodded subconsciously, obviously distracted.
The flying sword pattern is on the left hand, indicating that Taoism belongs to the right brain tube, so Taoism needs to see the essence. The double-ring ring is worn on the right hand, and magic belongs to the left brain tube, so magic requires language...
So damn scientific.
Chaos and the Mysterious Sword Immortal each have their own choices, but they don't delay each other.
but……
Li Liang suddenly remembered that he seemed to... no longer have to close one eye alone to use magic or Taoism.
This change was so silent that he didn't notice it.
Closing his eyes, he suddenly discovered that his field of vision was no longer a colorful patchwork, but if he looked carefully, there was something to be said, a faint outline.
Looks like...a black and white winged angel holding a sword.
How is this going?
"Dr. Xisen," Li Liang opened his eyes and asked, "What do you think is wrong with my corpus callosum?"
"It's abnormal and has shadows," Xisen scratched his head, "It's strange, I haven't seen this kind of disease before."
