Butterworth's concept of numerosity coding may be an important part of number sense, says Dehaene, but there is still much to learn about it — for instance, whether it is present in other animals or in children from a very early age. (scientificamerican.com)
If numerosity coding is fundamental, it predicts that dyscalculics such as Moorcraft or Christopher struggle to enumerate and manipulate all numbers, large and small. (scientificamerican.com)
The neural bases of numerosity processing have been investigated in structural and functional neuroimaging studies of adults and children, and neural markers of its impairment in dyscalculia have been identified. (science.sciencemag.org)