This revision: 9th May 2013 .
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It is akin to dyslexia and includes difficulty in understanding numbers, learning how to manipulate numbers, learning maths facts, and a number of other related symptoms.
Math disabilities can also occur as the result of some types of brain injury, in which case the proper term is acalculia, to distinguish it from dyscalculia which is of innate, genetic or developmental origin.
Although math learning difficulties do occur in children with low IQs, dyscalculia also affects people from across the whole IQ range, and sufferers often, but not always, also have difficulties with time, measurement, and spatial reasoning.