Epilepsy and insula

Neuro-Chirurgie
Marc Guénot, J Isnard

Abstract

The insula is the only cortical part of the brain that is not visible on the surface of the hemisphere, because it is totally covered by the frontoparietal and temporal opercula. The insula is triangular in shape and is separated from the opercula by the anterior, superior, and inferior peri-insular sulci. It is morphologically divided into two parts by the central insular sulcus. The anterior part of the insula bears three short gyri, and its posterior part contains two long gyri. The vascular supply of the insula is mainly provided by the M2 segment of the middle cerebral artery, a substantial obstacle to any open or stereotactic procedure aiming at the insular region. The insula is functionally involved in cardiac rhythm and arterial blood pressure control, as well as in visceromotor control and in viscerosensitive functions. There is substantial evidence that the insula is involved as a somesthetic area, including a major role in the processing of nociceptive input. The role of the insula in some epilepsies was recently investigated by means of depth electrode recordings made following Talairach's stereoelectroencephalography (SEEG) methodology. It appears that ictal signs associated with an insular discharge are very simil...Continue Reading

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Citations

Jul 14, 2010·Surgical and Radiologic Anatomy : SRA·Ioannis MavridisSophia Anagnostopoulou
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Jun 2, 2020·Neurosurgery Clinics of North America·Jorge Alvaro Gonzalez-Martinez, Patrick Chauvel

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