[[Eloquent area]]s in the Sawaya study are the motor/sensory cortices, visual center, speech center, internal capsule, basal ganglia, hypothalamus/thalamus, brainstem, and dentate nucleus

Grade I lesions are located in noneloquent brain

Grade II lesions in near-eloquent brain

Grade III lesions in eloquent brain
((Sawaya R, Hammoud M, Schoppa D, Hess KR, Wu SZ, Shi WM, et al. Neurosurgical outcomes in a modern series of 400 craniotomies for treatment of parenchymal tumors. Neurosurgery 1998;42:1044-56.)).

see [[Friedlein grading]]

see [[Sawaya grading]]

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