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  2. Stiff-person syndrome - Wikipedia

    en.wikipedia.org/wiki/Stiff-person_syndrome

    Eventually, rigidified muscles reduce the affected person's range of motion, slow their voluntary movements, and may cause them to have abnormal posture, particularly lumbar hyperlordosis (a distinctive curve in the lower back). [6] Rigid trunk muscles can also prevent the chest and abdomen from expanding, causing shortness of breath and early ...

  3. Rigid spine syndrome - Wikipedia

    en.wikipedia.org/wiki/Rigid_spine_syndrome

    Rigid spine syndrome, also known as congenital muscular dystrophy with rigidity of the spine (CMARS), is a rare and often debilitating neuromuscular disorder. It is characterized by progressive muscle stiffness and rigidity, particularly in the spine, which can severely limit mobility and impact quality of life. This condition is typically ...

  4. Spasticity - Wikipedia

    en.wikipedia.org/wiki/Spasticity

    Muscles affected in this way have many other potential features of altered performance in addition to spasticity, including muscle weakness; decreased movement control; clonus (a series of involuntary rapid muscle contractions often symptomatic of muscle over-exertion and/or muscle fatigue); exaggerated deep tendon reflexes; and decreased ...

  5. Heavy legs - Wikipedia

    en.wikipedia.org/wiki/Heavy_legs

    Heavy legs is a condition described as an unpleasant sensation of pain and heaviness in the lower limbs. Symptoms include legs feeling weighted, stiff, and tired. Heavy legs can be caused by a wide-ranging collection of disorders including but not restricted to varicose veins, peripheral artery disease, restless legs syndrome, multiple sclerosis, venous insufficiency.

  6. ALS - Wikipedia

    en.wikipedia.org/wiki/ALS

    The earliest symptoms of ALS are muscle weakness or muscle atrophy, typically on one side of the body. Other presenting symptoms include trouble swallowing or breathing, cramping, or stiffness of affected muscles; muscle weakness affecting an arm or a leg; or slurred and nasal speech.

  7. The Surprising Origins of 'Break a Leg'—and Why Performers ...

    www.aol.com/surprising-origins-break-leg-why...

    Why Do People Say 'Break a Leg'? Like many things, it all comes back to superstition. On the night of a big show, actors believe that wishing someone "good luck" is actually bad luck. So, they ...

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  9. Restless legs syndrome - Wikipedia

    en.wikipedia.org/wiki/Restless_legs_syndrome

    Restless legs syndrome (RLS), (also known as Willis–Ekbom disease (WED), is a neurological disorder, usually chronic, that causes an overwhelming urge to move one's legs. [2] [10] There is often an unpleasant feeling in the legs that improves temporarily by moving them. [2] This feeling is often described as aching, tingling, or crawling in ...