J Neurol Surg A Cent Eur Neurosurg 2015; 76 - A037
DOI: 10.1055/s-0035-1566356

Analysis of Anatomical Oriented and Direct Electrical Stimulation of the Brain Cortex in the Identification of Motor Area

I. Bogdanović 1, A. Janićijević 1, I. Nikolić 1, 2, N. Repac 1, V. Šćepanović 1, J. Živanović 1, L. Rasulić 1, 2, G. Tasić 1, 2
  • 1Clinic for Neurosurgery, Clinical Center of Serbia, Belgrade, Serbia
  • 2Medical Faculty, University of Belgrade, Belgrade, Serbia

Introduction Surgery of tumors localized in the motor cortex is challenging because of the accompanying risk of de novo occurrence of motor deficits.

Material and Methods We report a series of 34 patients with slow-growing brain tumors localized in and around the motor areas of the brain, which were treated at the Institute of Neurosurgery, Clinical Center in Belgrade, from 2008 to 2012.

Results The average distance of the central sulcus in relation to the coronary suture verified ES is 18.38 ± 9.564 mm, and the strength of the current required to obtain motor responses was 9.26 ± 1.286 mA. If the distance from the coronary suture is higher, the current intensity required to cause the motor response is lower (p < 0.01). The smaller amount of current is needed to identify the motor areas of tumors where the degree of surgical resection was subtotal to the level of reduction compared with radical surgery (p < 0.05).

Conclusion Direct electrostimulation of the cortex is a reliable method for identification of motor areas of the brain, and it is necessary for additional prevention of iatrogenic neurological deficits.

Keywords motor cortex; anatomical orientation; electrical stimulation