Little research has been done on acalculia, despite the fact the calculation is considered an essential, upper-level cognitive skill. However, calculation skills are assessed in neuropsychological exams such as the Mini-Mental State Examination (MMSE). There exist no norms for Acalculia against which a person can be compared to assess his/her level of cognitive impairment with regards to calculation abilities. See also Hypercalculia Numerical cognition References "Acalculia." Stedman's Medical Dictionary, 27th ed. (2000). Deloche G, Seron X, Ferrand I. Reeducation of number transcoding mechanisms: A procedural approach. In: Seron X and Deloche G, editors. Cognitive approach in neuropsychological rehabilitation. Hillsdale, NJ: Lawrence Erlbaum, 1989. External links Symptoms and signs: Nervous system 1920s neologisms