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Calculation deficits in patients with right and left hemisphere damage
1Fundacion Universitaria Konrad Lorenz, Bogota, Columbia.
Neuropsychologia
|January 1, 1989
Summary
Brain damage impacts calculation skills, with left hemisphere injuries causing significant acalculia. Right hemisphere damage also impairs calculation, often due to spatial deficits, highlighting diverse neuropsychological underpinnings.
Area of Science:
- Neuropsychology
- Cognitive Neuroscience
- Neurology
Background:
- Acalculia, or the impairment of calculation abilities, can result from brain damage.
- Understanding the specific deficits associated with different brain lesion locations is crucial for diagnosis and rehabilitation.
Purpose of the Study:
- To investigate calculation abilities in patients with left and right hemisphere brain damage.
- To compare the calculation deficits in these patient groups with a healthy control group.
- To analyze the types of errors and underlying neuropsychological dysfunctions.
Main Methods:
- Studied 41 left and 21 right hemisphere damaged patients.
- Compared patient results with a matched control group (age, sex, education).
- Grouped left hemisphere patients based on accompanying aphasia type.
Main Results:
- All patient groups exhibited some degree of acalculia.
- Maximum calculation difficulties were observed in patients with retrorolandic left hemisphere damage.
- Right hemisphere patients, particularly those with retrorolandic lesions, showed calculation impairments stemming primarily from spatial defects.
Conclusions:
- Both left and right hemisphere damage can lead to acalculia, with distinct underlying mechanisms.
- Retrorolandic left hemisphere lesions are associated with severe calculation deficits.
- Spatial deficits significantly contribute to calculation impairments in right hemisphere damaged patients.