The Microsurgical Anatomy of the Anterior Commissure

Abstract

Aim: The anterior comissure, that is a commissural fibers, connects frontal, temporal and occipital areas of the each hemispheres. Our aim is exposing the anterior commissure and it's segmantation's with white matter dissection technique in this study. Material and Method: Our study was performed eight human cadaver heads. Klingler's White matter dissections technique was used. Results: The anterior comissure was dissected from lateral and medial surface gradually. It locates on inferior and posterior of th erostrum of the corpus callosum on medial surface. Also, the anterior comissure is formed anterior border of the third ventricle. Dissection from lateral surface, it locates in the anterior base of lentiform nucleus obliquelly. The anterior commissure has five segments; corpus, anterior and posterior limb, temporal and occipital fibers. Discussion: The anterior-posterior commissure line, as bicommissural line is indispensable for surgery. In some cases, after callosotomy that uses epilepsy surgery, the resistans epileptic atacts still continue.The cause of this atacts is the anterior commissure and so it must be damaged during the callosotomy surgery. Conclusion: The white matter studies aid to better understand of the deep brain structures. Thus, we can perform the intraaxial surgeries more safely, and treat to the neuronal structires more kindly.