After hearing this, I seemed to understand a little, but I seemed to not understand it very much. A tangled expression flashed on the patient's face.

This situation once again tests the degree to which a doctor touches the patient's brain.

"I think what you are confused about is where the exact point of this place is. After saying so much, it is hard to imagine without a practical reference." Xie Wanying said.

Lin Jiayin nodded: "Yes. Doctor Xie, where is it? Did you mean the bottom of your brain?"

"It's the bottom, the bottom of the cup." Xie Wanying picked up a cup on the casual table, pointed to the bottom to show the patient, emphasizing that the other party heard it correctly.

The patient's expression showed difficulty again: "It's at the bottom of my head, isn't it here on my chin?"

As expected, this is what ordinary people understand. The bottom of the head is here.

The base of the brain skull is definitely not here in the chin. The chin is the lower part of the mouth. We know that the mouth will continue to be the throat, esophageal trachea, and it has nothing to do with brain tissue.

"We touch the back of the head, which is the occipital bone. When we touch the occipital bone, the front point is two temporal bones, and the temporal bone is connected to the middle of the front point. The mouth is the mandible bone, which connects the temporal bone upwards, and has the famous temporomandibular joint. Look at the height of the mandible bone is almost the same as the ear. So, to be more precise, the horizontal line of the disc bone in the middle is less than the chin, and it should be lifted up and closer to the nose. There is an important structural point in the sphenoid bone called the sphenoid sinus, which is connected to the nasal cavity."

After a doctor made a comparison and explanation with specific and intuitive reference objects, non-medical people on the scene suddenly became enlightened. Usually, it is wrong for laymen to understand that most of the horizontal lines of the brain to reach the chin. In fact, you can see that touching the back of a person's head, you can see that if the back of the head is slanted upward, most of the brain tissues are destined to not reach the bottom, that is, the brain hemisphere cannot reach.

It is not too difficult to understand that the brain and nose are connected.

Because the cerebrospinal fluid leaks in patients with brain trauma that we have mentioned before. If you think cerebrospinal fluid usually does not flow out from other places but only flows out from the nasal cavity, there must be some secrets of the human body here. Now the answer is revealed, it is because of the butterfly sinus.

The sphenoid sinus is a cavity and mouth that connects with the nose. The sphenoid bone is the brain that contains the brain in the skull. The sphenoid sinus naturally becomes a natural window for the brain to connect with the nose.

On the other hand, there is a natural opening like the sphenoid sinus that passes through the nose and opens the outside world. It seems that a natural hole appears in front of the doctor. It can directly contact the brain wrapped in a densely wrapped by the skull without opening the skull.

The mouth of the sphenoid sinus is very small, and the doctor cannot use it with his bare hands. It is located further deeper in the nose, so the doctor's eyes cannot see it. If the doctor wants to drill into this small hole, he can only use special surgical instruments.

Such surgical methods sound familiar. Yes, we can quickly associate human surgery in other parts of the surgery with similar principles and methods, such as gastroscopy and colonoscopy. These surgeries use the natural opening of the human body to contact the inside of the human body without using a scalpel to open the opening on the human body.

The instruments used for gastroscopy are called gastroscopy, the instruments used for colonoscopy are called colonoscopy, and so on, the instruments used for surgery through the nose are called nasal endoscopy.
Chapter completed!