Table 1.

Clinical Scenarios and the Preferred Method of IEEG.

Clinical Scenario	Preferred method	Secondary method
Lesion of hypothetical SOZ near or in eloquent cortex	SDE	SEEG
Lesion or hypothetical SOZ has a deep location or is not near eloquent cortex	SEEG	SDE & depth electrodes
Need for bilateral explorations & reoperation	SEEG	SDE & depth electrodes
Prior failure of SDE to localize SOZ	SEEG	SDE & depth electrodes
Need to map epileptogenic network	SEEG	SDE & depth electrodes

Abbreviations: IEEG, intracranial electroencephalography; SDE, subdural electrodes; SEEG, stereoelectroencephalography; SOZ, seizure onset zone.