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Basic numerical processing in left intraparietal sulcus (IPS) acalculia.

Sarit Ashkenazi¹, Avishai Henik, Gal Ifergane

¹Department of Psychology and Zlotowski Center for Neuroscience, Ben-Gurion University of the Negev, Beer-Sheva, Israel. ashkenas@bgu.ac.il

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior

|April 5, 2008

Summary

This summary is machine-generated.

A left intraparietal sulcus (IPS) infarct caused acalculia in patient AD, impairing basic numerical processing and quantity perception. This highlights the IPS's crucial role in mathematical cognition.

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Area of Science:

Neuroscience
Cognitive Psychology
Neurology

Background:

Acalculia, the loss of mathematical abilities, can result from brain damage.
The intraparietal sulcus (IPS) is implicated in numerical cognition.

Observation:

Patient AD experienced acalculia after a stroke limited to the left IPS.
AD exhibited deficits in arithmetic and fundamental numerical tasks.

Findings:

AD showed an exaggerated distance effect in numerical comparisons.
Impaired size congruity, deficient counting, and abnormal subitizing were observed.
These deficits suggest a core issue in quantity perception and manipulation.

Implications:

The findings underscore the critical role of the left IPS in basic numerical processing.
This case provides insight into the neural underpinnings of mathematical abilities.