Encephalography using supra-occipital tapping of the cisterna magna

A report is given of the results of supra-occipital tapping of the cisterna magna and dynamic encephalography by that route. In 72 patients with cranial hypertension this encephalography was well tolerated. Supra-occipital tapping is less dangerous than suboccipital puncture as regards the possibility of injury to the medulla. In 38 cases, the method led immediately to the diagnosis of herniation of the tonsils.