The interaction between the utricle and the saccule.
D000054:Acceleration; D000818:Animals; D002415:Cats; D007758:Ear, Inner / Q000502:physiology*; D004558:Electric Stimulation; D005133:Eye Movements; D006112:Gravitation; D006801:Humans; D009801:Oculomotor Muscles / Q000502:physiology*; D009802:Oculomotor Nerve / Q000502:physiology*