processes, respectively. Multidigit written calculations. Concrete arithmetic problems requiring some planning. Evaluation of the numerosity of sets of dots, presented either briefly to test estimation abilities, or for an unlimited duration to allow for serial counting. Treatment Gerstmann syndrome and similar symptom combinations are outcomes, not diseases. Treatment, therefore, is dedicated to the underlying neurological abnormality. Cognitive rehabilitation may be useful for the symptoms that interfere with activities of daily life, such as agraphia and acalculia. There are several ways in which rehabilitation of acalculia is carried out. Tsvetkova proposes using the "number reconstruction" method. It is started by incorporating certain "visual elements (e.g., completing eight, starting from the number 3), looking for certain elements within a number (e.g., looking for the number 1 in the number 4), and finally, performing a verbal analysis of the similarities and differences that can be observed between numbers". At the same time that these number reconstruction technique is used, spatial orientation exercises, comprehension of the right-to-left relationship, and visual analysis of geometrical objects and forms should be developed. In a more basic form, the method used was rote practice: the retrieval of simple arithmetical facts through drill or through conceptual training, or the creation of strategies for solving concrete problems. Sohlberg and Mateer have said that "treatment should then include exercises that permit spatial analysis and visual motor ability training." Rehabilitation tasks are implemented following a program that progressively increases difficulty, beginning with simple movements designed for reaching for or indicating objects following by copying figures in two dimensions, and concluding with the construction of three-dimensional figures. In a case study, Rosselli and Ardila describe the rehabilitation of a 58-year-old woman with spatial alexia, agraphia, and acalculia associated to a vascular injury in the right hemisphere. The patient could adequately perform oral calculations but was completely incapable of performing written arithmetical operations with numbers composed of two or more digits. In a special test of written arithmetical operations (addition, subtraction, multiplication, and division), and initial score of 0/20 was obtained. She was observed to have mixed up the arithmetical procedures and inadequately oriented the columns in mathematical problems. The rehabilitation techniques implemented included the following: "Using short paragraphs with a red vertical line placed on the left margin and with the lines numbered on the left and right sides, the patient, using her index finger, had to look for the numbers corresponding to