But what happens in myasthenia gravis though?

但是重症肌无力是如何发生的呢？

Its effects can lead to muscle weakness and trouble breathing.

它的影响会导致肌无力和呼吸困难。

A common sign of MS is muscle weakness and a loss of coordination.

MS的常见症状是肌无力以及丧失协调能力。

To better understand myasthenia gravis, let's review normal muscle contraction but at the cellular level.

为了更好的理解重症肌无力，我们从细胞水平来了解一下肌肉正常收缩时的状态。

The good news is is that treatment has been able to reduce mortality from myasthenia gravis.

好消息是现在的案可以降低重症肌无力的死亡率。

Finally, a lot of people with myasthenia gravis undergo surgical removal of the thymus.

最终，许多重症肌无力患者会进行胸腺切除术。

Myogenic a. Impairment of transmission of impulses from the nerve to the muscle at their junction, e. G Myasthenia Gravis.

从神经到肌肉的神经脉冲传递障碍，如重症肌无力。

This distinguishes muscular dystrophy from other problems that cause muscle weakness as a result of nerve damage, like neuropathies.

这让肌营养别于其它因神经损伤造成肌无力的因素，如神经损伤疾病。

Weakened muscles, back pain, eye problems, astronauts say they've experienced all of these ailments after working in orbit.

微重力会导致肌无力，背部酸痛和眼疾，宇航员称在轨道上工作后遭受了所有这些疾病。

Myasthenia gravis is also treated with immunosuppressive drugs (like prednisone), which reduce the production of the harmful antibodies.

重症肌无力也可使用免疫抑制药物（如强的松）以减少有害抗体的产生。

It's caused by two things — tight hip flexors and weak glutes.

它是由两件事引起的——髋屈肌紧绷和臀肌无力。

When motor nerves supplying the muscles are affected, there's initially muscle weakness and an absence of reflexes.

当支配肌肉的运动神经受损，患者会感到肌无力以及反射消失。

Mild hyperkalemia is often without symptoms, although some patients may develop muscle weakness.

轻度高钾血症通常无症状，尽管有些患者可能出现肌无力。

Motor symptoms can include muscle weakness, muscle spasms, tremors, and ataxia, which is a loss of balance and coordination.

运动症状包括肌无力、肌痉挛、震颤和共济失调（失去平衡和协调运动）。

Tumors on the sympathetic chain might also grow into the spine, causing neurologic symptoms, like muscle weakness or bowel and bladder problems.

交感神经链上的肿瘤也有可能生长到脊柱，导致神经系统症状，如肌无力或肠道及膀胱问题。

In severe cases, the inability to process methionine can lead to neurological problems and muscle weakness, among other problems in the nervous system.

在严重的例子中，处理甲硫氨酸的无能会导致神经性的障碍肌无力和其他神经系统的问题。

This seems to reduce the muscle weakness symptoms even in people that don't appear to have any identifiable problems with the thymus gland itself.

这似乎可以减轻重症肌无力症状，即使那些患者的胸腺本身没有问题。

The low potassium or hypokalemia is particularly worrisome because it can lead to muscle weakness and even cardiac arrhythmias, the latter of which can lead to death.

其中低血钾是尤其危险的，因为它能导致肌无力甚至心律失常，后者可危及生命。

Myasthenia gravis is a type II hypersensitivity disorder where the body produces antibodies that most commonly target nicotinic acetylcholine receptors on the surface of muscle cells.

重症肌无力是一种II型超敏反应，身体产生抗体，常见靶点为肌肉细胞表面的N胆碱受体抗体。

But holding it in for too long, forcing out your urine too fast, or urinating without proper physical support may over time weaken or overwork that muscular sling.

但是憋着的时间太长会导致你排尿的速度特别快或者尿的时候没有合适的身体支撑可能会使尿道括约肌痉挛或者逼尿肌无力。