[Physics Knowledge Chat] Why do you have to suffer? ｜Pain, Pain Relief and Physical Therapy (2)

"Feeling" comes from your brain from beginning to end. It interprets the signals generated by "stimulation" and then presents it.

Deleting a word in the draft of the article in Matt City is actually composed of a series of actions when you press backspace, the signal is transmitted to the host through the potential, and the host "judged" it as deletion, and finally executes the action . Before the computer can respond, it is a process of "feeling" formation.

Image, sound, touch, vibration, acupuncture, temperature... Since the birth of the mother, the brain has never stopped receiving any stimulation. The "feeling" formed by these stimuli is like standing on the beach and looking at the endless waves of the sea. Although you can see everything, none of them can catch your attention; the only "pain" is a big wave, even if it appears. Tsunami , at this point you must be preoccupied, wondering how far away you are, if you can escape, or if you are already running backwards without looking back .

💥 Pain: Deliberately highlight

Pain nerves account for half of the sensory nerves, and they are spread throughout the body, which is to play the role of an "alarm" . The function of pain sensation is: prompting the severity, scope, and type of pain, making you realize that you should find a way to treat yourself ; medically, it is divided into three types according to the location of receptors, and they show different characteristics.

🩸Superficial somatic pain:

This type of pain is easily irritated because the receptors are on the surface of the skin; it is usually caused by trauma, and is characterized by a sharp, well-defined but short-lived pain . Such as: being scratched by a finger, acupuncture between the nails, hitting the little finger, toothpicks hitting the gums...

🩸Deep Body Pain:

For example: muscle strain, ligament sprain, fascia pain, fracture, joint inflammation... This is the main "audience" of physical therapy. The distribution of nerves in these parts is relatively scattered, so the pain and scope are relatively vague , usually described as: dull, dull, dull pain, no precise pain point, and relatively long duration .

🩸Visceral pain:

The simplest example is stomach pain. Wider and more indistinct, longer duration, variable pain manifestations : tearing, cramping, throbbing...

👋 The more the pain sensation that affects "life safety", the less obvious, the blurrier the scope, and the longer the duration. This is the result of the mutual cooperation of "pain and pain relief".

🧊 Pain relief: Deliberate suppression

Greater pain means greater crisis . When encountering a crisis, the focus is on "escape"; therefore, other body sensations are purely "adaptive", that is, if you stimulate a few more times, you will become less "feeling" because you are used to it, but the pain sensation has two additional effects. Set up a "pain relief" system, just to make the pain just right, not only let you know that you are injured, but will not affect your movement .

💧 Gate valve control

👉Mom Huhu 👉Fast effect and short effect

Using the principle that the speed of tactile transmission is greater than that of pain , the nerve impulses of tactile can trigger the "interneurons" that can inhibit pain in advance, and indirectly prevent pain from uploading to the brain; in short, tactile is racing against pain, and tactile not only runs fast, but also cheats Ironing people (interneurons) to close the door in the channel and block the pain sensation; but a tactile player can burn only a limited number of people, so find a few more tactile sensations, and continuously give the surrounding skin tactile sensation, which can greatly reduce the pain sensation.

This is the most involved pain-relieving mechanism for superficial or deep body pain . From the slightest abrasion to soft tissue injuries that affect motor function, gate valve control can quickly suppress pain in the shortest time. Just this short recovery of movement can let you escape from possible danger.

💧 Downward inhibition

👉Relieve pain with pain 👉Slow effect and long effect

This is a pain-relieving mechanism performed by the brain . When the stimulus is uploaded to the brain to become pain, the brain will release "endorphins" to the brainstem, inducing downlink signals all the way to the "interneurons" in the spinal cord, thereby inhibiting the pain response In other words, the pain sensation reaches the end, but there is a person at the end who is unhappy as a result, and the caller (interneuron) processes the pain .

The more serious the injury, the more likely the crisis in front of you is to be life-threatening , with visceral injuries being a good example. At this moment, you have to run away, and you have to run as far as possible. At this time, the duration of only relying on the gate valve control is too short, so the brain is used to directly issue instructions for long-term pain relief, so that you can at least hold your chest. Hold your stomach and run for a distance.

👋For minor abrasions , gate valve control can quickly reduce pain; the more life-threatening pain, the more descending inhibition is involved.

In the human body, the mutual cooperation between pain and pain relief comes from a very primitive reason- survival : it needs to cover a wide range, to feel the pain, but not to be so painful that it is impossible to move, and depending on the situation, the pain will take longer.

However, in modern life, life-threatening situations are rare, but there are many civilized diseases, chronic diseases, diseases that have no cause or do not want to be identified, and even chemotherapy, tranquility, etc. Factors make pain an annoying one. Thanks to medical progress, surgery has become a life-saving elixir for many accidents and major diseases, but this pain response is unbearable for normal people.

Therefore , pain relief as a medical means is necessary. Is this extra pain relief really necessary when it is abused, used to escape reality, and ultimately delays treatment? What roles do we play in it? Let's continue the chat in the next article!

📝There are a few questions I would like to ask you all :

✔️ Have you ever experienced mother whirring or pain relief ?
✔️ Do you think painkillers work?
✔️ If one day you didn't feel any pain , how would your life be like?

📝Extended reading : What to do with soft tissue injuries ?

✔️Ankle sprain
✔️Tennis & Golf Elbow
✔️ Mom hand

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