Symptoms of arm muscle cramps

Human limbs are flexible and controlled by the brain, and arms and legs are relatively important parts. Because the reason why people can walk independently is because they have their own arms and legs. However, arm muscle diseases can also occur, and this is often due to problems with the intensity of exercise, such as excessive exertion. Arms can also experience spasms, so what are the symptoms of arm muscle spasms?

1. Symptoms of arm muscle cramps

When muscles twitch involuntarily, people often express anxiety and fear. In fact, there is no need to be alarmed by "fun twitching". The fluttering of most patients is benign, which is medically known as "benign fasciculation syndrome". Benign fasciculation syndrome is a common neurological symptom characterized by involuntary fasciculations in local muscles of the body. It is most common on the face and limbs and will not progress to other serious neurological diseases.

2. Causes of arm muscle twitching

Amount of salt excretion: In summer, we sweat a lot, and a large amount of salt will be excreted, which may cause cramps, so we should also pay attention to maintaining a balanced salt ratio. Eating too much salt is not good.

Low calcium can cause seizures. Calcium ions are a coupling factor of excitation-contraction and their effect is positive. But this refers to after the excitement occurs; for fast-response cells that mainly produce depolarization due to the influx of sodium ions caused by the opening of fast sodium channels, the high extracellular calcium of calcium ions inhibits the influx of sodium ions due to the existence of the "membrane barrier effect", and the excitability is reduced. When extracellular calcium is low, the "membrane barrier effect" of calcium ions is weakened and cell excitability increases.

When calcium is low, the "membrane barrier function" of calcium ions is weakened, cell excitability increases, and cells become easily excited. On the other hand, the excitation-contraction coupling ions in the sarcoplasm, calcium ions, did not decrease due to low extracellular calcium. Skeletal muscle has rich sarcoplasmic reticulum, which stores sufficient calcium. The release of sarcoplasmic reticulum calcium can rapidly increase the calcium concentration in the sarcoplasm, triggering the excitation-contraction coupling, so this link is not affected. Therefore, when calcium is low, on the one hand, the cells are easily excited because the membrane barrier function is weakened, and on the other hand, the excitation-contraction coupling is not affected, so it manifests as muscle twitching.