Last Updated: September 27, 2018
General Considerations and Operative Anatomy
Parietal craniotomy is designed to provide an operative exposure of the mid to posterior hemisphere while sparing the highly functional anteriorly located sensorimotor cortices and the posteriorly located visual cortex. The approach can be devised to lateral and mesial parietal lobe lesions as well as to interhemispheric median or paramedian lesions.
The variations of this corridor allow access to lesions through the transcortical route (through the more functionally “silent” superior parietal lobule) or the interhemispheric fissure. The parasagittal veins are often less numerous in the posterior parietal region, therefore providing an opportunity to reach deep lesions through the interhemispheric trajectory.
The right or nondominant parietal...