An otolith (Ancient Greek: ὠτο-, ōto- ear + λῐ́θος, líthos, a stone), also called otoconium, statolith, or statoconium, is a calcium carbonate structure in the saccule or utricle of the inner ear, specifically in the vestibular system of vertebrates. The saccule and utricle, in turn, together make the otolith organs.

The otoliths (ear-stones) are small structures located in the inner ear used to register gravity and linear acceleration. Quail otoconia from Dickman et al (2004). Most creatures have otoconia. The utricle is one of two "otolithic organs" in the human ear, the utricle and saccule.

The otolithic membrane is a fibrous structure located in the vestibular system of the inner ear. It plays a critical role in the brain 's interpretation of equilibrium. The membrane serves to determine if the body or the head is tilted, in addition to the linear acceleration of the body.

Otoconia are bio-crystals which couple mechanic forces to the sensory hair cells in the utricle and saccule, a process essential for us to sense linear acceleration and gravity for the purpose of maintaining bodily balance. In fish, structurally similar bio-crystals called otoliths mediate both balance and hearing.

…particles of calcium carbonate, called otoliths, that weigh against the hairs. Unusual stimulation of the vestibular receptors and semicircular canals can cause sensory distortions in visual and motor activity. The resulting discord between visual and motor responses and the external space (as aboard a ship in rough waters) often leads…

Mar 14, 2025 · Explore how otoliths contribute to balance, their neurological connections, and their relevance in diagnosing and understanding balance disorders. Tiny structures in the inner ear play a crucial role in maintaining balance and spatial awareness.

Jul 5, 2022 · The otoliths are the part of our inner ear that sense linear movements and gravity. Problems in the utricle and saccule can cause vestibular symptoms like rocking, swaying, dropping, or feeling pushed or pulled. Learn more about otolithic dysfunction and how vestibular rehab could help.

Mar 11, 2025 · Otolith organs are critical components of the inner ear, essential for perceiving gravity and maintaining balance. These small structures help us navigate by detecting changes in head position and linear movements. Understanding their function is crucial for comprehending how we achieve equilibrium.

OTOLITHIC meaning: 1. relating to otoliths (= very small pieces of bone-like material in the inner ear of people and…. Learn more.

Our results, obtained through micro-CT of 136 inner ears, reveal two major evolutionary transitions in hominoids, leading to distinctive vestibular morphology in humans, characterized by otolithic morphology resembling squirrel monkeys (possibly due to reversal), with a pronounced supraovalic fossa.