Since its presentation by G.N. Hounsfield at the second Congress of the European Association of Radiology in Amsterdam in June 1971, "Computerised Trans verse Axial Tomography" which became later on "Computerised Axial Tomography (CAT)" then simply "Computed Tomography (CT)" has developed extremely rapidly. Many papers have appeared in a short time, pointed out the substantial advantages of this new technique and precisely describing the characteristic images obtained. The number of devices is already considerable and their evolution tends towards the improvement of the quality of images and...

A few evenings ago in the Hall of the Neurological Clinic of Bologna University Dr. HENRI HEcAEN gave a lecture on the physiopathology of writing. As I was listening to his learned exposition, memories returned to me of times when my reaction to his work was not always the enjoyment of a quiet listener; namely, of the times when, ten years before, during the" seances du samedi" at the Neurosurgical Center of Saint' Anne Hospital in Paris, our meetings often consisted of disputes, in a sparkling tangle of alliances and hostilities, which would often result in clashes between TALAIRACH,...