acalculia


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Related to acalculia: Gerstmann syndrome, Finger agnosia

acalculia

 [a″kal-ku´le-ah]
inability to solve mathematical calculations.

a·cal·cu·li·a

(ā'kal-kyū'lē-a),
A form of aphasia characterized by the inability to perform simple mathematical problems; found with lesions of various areas of the cerebral hemispheres, and often an early sign of dementia.
[G. a- priv. + L. calculo, to reckon]

acalculia

[a′kalko̅o̅′lyə]
Etymology: Gk, a, not; L, calculare, to reckon
the inability to perform simple mathematic calculations the patient previously knew. Commonly seen in neurological disorders, it is assessed by having a patient count forward or backwards or do mental addition or subtraction. See also agraphia, constructional apraxia, dementia, finger agnosia, Gerstmann's syndrome.

Acalculia

An inability to perform simple mathematical calculations (adding subtracting, multiplying, dividing); loss of a previously possessed ability to engage in arithmetic calculation. 
Brain locations Parietal lobe (angular gyrus), frontal lobe
Associations Dementia, Gerstmann syndrome

acalculia

Neurology Loss of a facility with arithmetic calculation

a·cal·cu·li·a

(ā-kal-kyū'lē-ă)
A form of aphasia characterized by the inability to perform simple mathematical problems; found with lesions of the cerebral hemispheres, and often an early sign of dementia.
[G. a- priv. + L. calculo, to reckon]

acalculia

Total or partial loss of the ability to perform even simple arithmetical calculations. This may rarely be a specific developmental disorder, but is more often acquired as a result of brain damage, usually to the PARIETAL LOBE, in the course of a STROKE. In this case, the acalculia is a kind of APHASIA. Acalculia without obvious cause may be a herald of DEMENTIA.
References in periodicals archive ?
Sobre este particular resultan especialmente interesantes el estudio de como distintos patrones de lesion cerebral influyen en la acalculia.
Spatial acalculia is a distinct disorder characterized by difficulties in the spatial representation of numbers which manifest as number rotation, number omission, misreading of arithmetical signs, difficulty with column alignment and placing of decimals, while leaving number reading and number formation skills intact (Geary, 1993).
Como consecuencia de este analisis y en coherencia con el modelo teorico que venimos desearrollando a lo largo de este escrito, las alteraciones en las habilidades matematicas podria ser atribuidas a: (i) Deficit en el Sistema de Procesamiento Numerico: Alexia, y agrafia numerica y acalculia visoespacial y (ii) deficits en el Sistema de Calculo: alteraciones en la comprension de simbolos y conceptos de las operaciones matematicas, alteraciones en el recuerdo de los hechos matematicos y alteracion en la ejecucion de tareas matematicas.
His evolving paralysis and acalculia, his fits of rage and disgust--all documented--immediately open up enormous "plastic" possibilities.
Finally, the chapter by Seron and Noel deals with the relation between acalculia (a deficit in calculation and number processing) and language processing at different levels (lexical and syntactic).
Acalculia y apraxia ideomotora pueden aparecer incluso durante los dos primeros anos de evolucion.