1 Type III, also called Kugelberg-Welander disease or juvenile spinal muscular atrophy, begins to affect kids as early as 18 months of age or as late as adolescence. This is the mildest form of SMA in children.  Type IV is the adult form of the disorder.
Minamata disease, sometimes referred to as Chisso-Minamata disease, is a neurological syndrome caused by severe mercury poisoning. Symptoms include ataxia, numbness in the hands and feet, general muscle weakness, narrowing of the field of vision and damage to hearing and speech.
These images begin to coalesce when one becomes aware of the event to which they make reference: the mercury poisoning of Minamata Bay in southern Kumamoto Prefecture in the 1950s and '60s, which resulted in a thousand deaths and tens of thousands of cases of chronic blurred vision, slurred speech, and fetal deformity.