The postcentral sulcus runs parallel to and behind the central sulcus, forming the back border of the postcentral gyrus. The intraparietal sulcus usually branches backwards from it. It separates the primary somatosensory cortex from the parietal association areas.
| Location | Lateral surface of the parietal lobe, posterior to and parallel with the central sulcus |
|---|---|
| Connections |
|
| Blood Supply | Middle cerebral artery (anterior parietal branch) |
Marks the back border of the primary somatosensory cortex.
It helps identify the postcentral gyrus on imaging and at surgery. Lesions behind it affect the parietal lobules and cause higher-level sensory and spatial problems rather than simple numbness. The anterior parietal artery, a branch of the middle cerebral artery, usually runs nearby.
Infarction near the postcentral sulcus causing cortical sensory loss and, depending on side, neglect or apraxia.
A tumour in this region that may cause sensory seizures or impaired position sense.
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