The development of magnetic resonance imaging (MRI) will deep- ly change the relationship between neuroanatomy and the neuro- logical sciences, particularly neuroradiology. Presentation of nor- mal or abnormal brain structures is sometimes more precise in MRI sections than in brain or spinal-cord sections under macro- scopic examination. It is our conviction that a better exchange be- tween neuroanatomy and neuroradiology will improve knowledge of the brain. This international meeting held in Marseille, 26-27 September 1986 (under the Presidency of G. Lazorthes and G. Di Chiro in collaboration with M. Habib, secretary of redaction for the Congress and its publication) would like to contribute to this field. Marseilles, January 1988 A. Gouaze G. Salamon Table of Contents Introduction G. Lazorthes 1 External References of the Bicommissural Plane U. Bergva71, C. Rumeau, Y. Van Bunnen, J. M. Corbaz, and M. Morel. . . . . . . . . . . . . . . . . . . . . . . 2 Identification of Cortical Sulci and Gyri Using Magnetic Resonance Imaging: a Preliminary Study C. Rumeau, A. Gouaze, G. Salamon, J. LafJont, F. Gelbert, H. Einseidel, M. Jiddane, P. Farnarier, M. Habib, and S. Perot . 11 The Hippocampal Formation and Related Structures of the Limbic Lobe: Anatomic - Magnetic Resonance Correlation T. P. Naidich, D. L. Daniels, V. M. Haughton, A. Williams, P. Pech, K. Pojunas, and E. Palacios. . . . . . . . . . . . . 32 Brain Stem and Cerebellum: Normal and Pathological Anatomy C. M. Strother and C. Raybaud . . . . . . . . . . . . . . . . . 65 Magnetic Resonance Imaging of the Eyes and the Optic Pathways J. C. Tamraz, M. T. Iba Zizen, and E. A. Cabanis . . . . . . .