• Jose Pedro Lavrador, Hannah Keeble, Prajwal Ghimire, Francesco Fiorini, Ranjeev Bhangoo, Francesco Vergani, Richard Gullan, and Keyoumars Ashkan.
• Neurosurgery Department, King's College Hospital Foundation Trust, London, UK.
• World Neurosurg. 2022 Aug 1; 164: 64-68.

BackgroundIntraoperative neuromonitoring of motor functions experienced a dramatical revolution in the last years thanks to significant advances in anesthesiology procedures and both preoperative and intraoperative mapping techniques. Asleep, awake, and combined intraoperative mapping techniques were responsible for an improvement in the functional outcomes in neurosurgery, providing reliable and reproducible mapping of both projection and association fibers involved in motor control.MethodsWe report inter-M1 cortico-cortical evoked potential (CCEP) recording during asleep resection of a bilateral parasagittal meningioma with intraoperative neuromonitoring and motor mapping.ResultsCCEPs were recorded between both M1 cortices with bipolar stimulations of both supplementary motor areas (10.5-11.5 μV).ConclusionsHere, we provide evidence of intraoperative mapping of commissural fibres involved in motor control in a patient with asleep technique as well as a review of the potential tracts involved in the connectivity underlying the motor function.Copyright © 2022 Elsevier Inc. All rights reserved.

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