Selective impairment for simple division.
We report the case of a patient, C.B., with a calculation impairment. His performance on simple division problems was severely impaired while his performance on simple and complex addition, subtraction and multiplication problems was largely spared. The patient was also found to be impaired in solving simple arithmetical problems such as Nx? = M. The implications of these findings for the organization of arithmetical facts are discussed.
Brook General Hospital, London.
L
L
Cipolotti
A
A
de Lacy Costello
D001925:Brain Damage, Chronic / Q000175:diagnosis / Q000503:physiopathology*; D002543:Cerebral Hemorrhage / Q000175:diagnosis / Q000503:physiopathology; D002544:Cerebral Infarction / Q000175:diagnosis / Q000503:physiopathology*; D005625:Frontal Lobe / Q000503:physiopathology; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000503:physiopathology; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000503:physiopathology; D011340:Problem Solving / Q000502:physiology*; D014057:Tomography, X-Ray Computed