What is the reason for the pain in Qihai

summary

I believe that Qi Tang pain should not be unknown. Qi Tang pain first comes from the damage of body tissue. It may be understood in a different way, which produces some painful substances and stimulates the pain receptor. The stimulation of these chemicals is converted into pulses in nerve cells and transmitted to the spinal cord, brain stem, hypothalamus and brain through a δ and C nerves. There was no individual difference in the transmission of pain to the thalamus. It's the brain that determines an individual's response to pain. Let's talk about the cause of Qitang pain.

What is the reason for the pain in Qihai

First, when the tissues of the body are injured, whether they are bitten, burned or hit by mosquitoes, inflammation will occur. The substance causing inflammation but not pain will overflow from the tissue; even if the concentration is very low, it is enough to cause pain. There are many kinds of these substances, including amines, proteolytic substances, polypeptides, prostaglandins, hydrogen ions and so on. The function of histamine is to increase the permeability of blood vessels, make tiny pores appear in tiny blood vessels, and make white blood cells and antibodies in blood enter the tissue from blood vessels. Prostaglandins are known as pain enhancers; they do not cause pain but promote inflammation. The purpose of inflammation is to increase the concentration of local leukocytes, antibodies and immune factors, protect tissues, remove wastes and make appropriate repair.

Second: when tissue is injured, the spilled substances, including hydrogen ions, will stimulate specific receptors. Specific receptor refers to the sensory receptor has a specific response to a certain stimulus.

Third: mechanoreceptors conduct touch and pressure, Thermoreceptors conduct warm and cold sensation, nociceptors have high threshold to stimulation (i.e. respond to strong stimulation), and chemoreceptors are sensitive to stimulation of different pain causing chemicals. After being stimulated, these receptors will conduct through different nerves. Mechanical nociceptive receptors are mainly transmitted through a δ nerve fibers.

matters needing attention

Qi Tang pain nerve is conducted by two different kinds of nerve. Because the conduction speed of a δ nerve fiber is faster than that of C nerve fiber, the injured can feel two different kinds of pain after injury: fast pain and slow pain. Rapid pain, also known as first pain, is first transmitted by a δ fiber. It has a definite range; the pain is sharp but short, and the slow pain is also called the second pain, the faster pain appears later. The range of pain is uncertain and lasts for a long time.