Superior parietal lobule Approach
- Introduction- The superior parietal lobule provides a surgical corridor between the motor and visual pathways. This approach should be well known to neurosurgeons for evacuation of hematomas, vascular malformations, and neoplasms.
- Anatomy- The SPL is posterior to the postcentral gyrus and postcentral sulcus.
o Anterior Border- Post central sulcus
o Lateral Border- Intraparietal sulcusThe SPL extends from the intraparietal sulcus to the midline.
o Posterior Border- the parieto-occipital sulcus.
o The superior parietal lobule can be estimated based on bony landmarks. Anteriorly from the inion 7cm and lateral 3cm (left)/4cm (right) are common landmarks for the SPL.
- Positioning- Park-bench/Lateral, affected side up. Make sure to secure the patient to the bed with tape so they don’t fall off when you rotate the bed to the contralateral side
- Incision- Depends largely on the operation but often a sinusoidal, linear, or horse-shoe incision are employed
- Approach- To approach tumors in the atrium of the lateral ventricle the Vycor tubes are awesome. You can split the intraparietal sulcus, avoiding the optic radiations, and enter the ventricle.