Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology 1 article published in JoVE Medicine Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm Fiona I. Jäger*1, Kirsten Platho-Elwischger*2, Gerald Wiest1 1Department of Neurology, Medical University Vienna, Austria, 2Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria The perception of gravity is commonly determined by the subjective visual vertical in the head upright position. The additional assessment at head tilts of ± 15° and ± 30° in the roll plane ensures increased information content for the detection of impaired graviceptive perception.