Information relating to position and movement of the head is provided by the vestibular apparatus of the ear which include: the utricle, saccule and semi - circular canals. These three make the vestibular apparatus, and their destruction leads to a considerable loss of the sense of equilibrium or balance. Utricle and saccule house gravity detectors called otoliths; the semi - circular canals (three in number) house the endolymph that provides information about turning movements.