📁 SpinalMuscularAtrophy
Spinal muscular atrophy is a term for a group of inherited neuromuscular diseases. All forms of the disease affect specialized nerve cells called motor neurons, which control the movement of voluntary muscles. SMA causes lower motor neurons in the base of the brain and the spinal cord to disintegrate, preventing them from delivering electrical and chemical signals that muscles depend on for normal function.
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Wikipedia: Congenital Insensitivity to Pain
http://en.wikipedia.org/wiki/Congenital_insensitivity_to_pain