English to Swedish Medical Medical (general)

Motor neuron diseases (MNDs) are progressive, degenerative disorders that affect nerves in the upper or lower parts of the body. Some of the diseases are inherited, while others may be acquired. Common MNDs include amyotrophic lateral sclerosis (ALS), progressive muscular atrophy, and postpolio syndrome. Generally, MNDs strike in middle age. Symptoms may include difficulty swallowing, limb weakness, slurred speech, impaired gait, facial weakness, and muscle cramps. Respiration may be affected in the later stages of these diseases. The cause(s) of most MNDs are not known, but environmental, toxic, viral, or genetic factors may be implicated.