Somatogyral illusions occur as a result of angular accelerations stimulating the semicircular canals . Somatogravic illusions , on the other hand , occur as a result of linear accelerations stimulating the otolith organs . Some Somatogyral illusions are the leands , graveyard spin / spiral and Coriolis . Some of the Somatogravic illusions are Somatogravic ( false climb ) , inversion , G-excess , elevator and attitude