<unk>  has only been described as developing in Africa, South-east Asia, and the Caribbean (if Guiana be included). It does not seem to occur in temperate countries. People affected by<unk>  tend to be poor and live in rural areas. In some areas, more than a quarter of the population are affected. In India and Africa, more women are affected; in Africa, the elderly are most likely to suffer, and in India, people in their thirties. Historical data suggests that, in the 1960s,<unk>  in Africa was most common in people in their 30s and 40s. While the areas affected roughly correspond to the areas in which cassava is grown, some people in non-cassava-growing populations get<unk> , and some cassava-growing populations do not get<unk> . It is possible that there are several diseases being categorized as<unk> . It has been estimated that 5% of surviving World War II prisoners of war held in the Far East acquired<unk> ; while they were held for 3.5 years or less, the<unk>  symptoms persisted chronically after they returned to temperate climates.
Tropical ataxic neuropathy
Multiple system atrophy
Amyotrophic lateral sclerosis
Neurasthenia
Giant axonal neuropathy
Paraneoplastic cerebellar degeneration
Polyneuropathy
Spinal and bulbar muscular atrophy