The intraparietal sulcus runs backwards from the postcentral sulcus across the parietal lobe, dividing it into the superior and inferior parietal lobules. It often continues into the occipital lobe. The cortex in its walls is closely tied to eye movements, reaching, grasping and number sense.
| Location | Lateral surface of the parietal lobe, running posteriorly from the postcentral sulcus |
|---|---|
| Connections | |
| Blood Supply | Middle cerebral artery (parietal branches) |
Divides the parietal lobe into upper and lower lobules; its cortex helps direct attention, eye movements, reaching and grasping, and represents quantity.
Areas in the intraparietal sulcus guide eye movements, reaching and grasping, so damage contributes to optic ataxia and spatial attention problems. Reduced function here is linked to developmental dyscalculia, difficulty with numbers. It is a target in functional imaging studies of attention.
A specific learning difficulty with numbers and arithmetic linked to altered intraparietal sulcus function.
Inaccurate reaching under visual guidance after damage to the superior parietal lobule and intraparietal sulcus.
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