oculogyral illusion
oc·u·lo·gy·ral illusion
noun \ˌäk-yə-lō-ˌjī-rəl-\Definition of OCULOGYRAL ILLUSION
: the apparent motion of an object that is fixed in relation to an observer whose semicircular canals have been stimulated by rotational motion—called also oculogyric illusion
