acalculia

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.