Gelatinous structure in crista ampularis of semicircular canals.

A gelatinous mass located within the ampullae of the inner ear, which shifts position in response to changes in the position of the head. The shift results in an impulse generation,, interpreted by the brain as dynamic equilibrium Cutaneous (kyoo-TA-nee-uhs) membrane One of the three types of epithelial membranes found in the body, it is also known as the skin.

(plural cupulae): A jellylike rod projecting into the water from a neuromast, part of a fish's or amphibian's lateral line system. Vibrations in the water cause the cupula to move, thus setting off nervous impulses that enable the animal to detect nearby movements in the water.

The gelatinous covering of a neuromast organ. See also, The Ear .

The cupula forms the apex of the cochlea. The bony canal of the cochlea takes two and three-quarter turns around the modiolus. It is about 30 mm. in length, and diminishes gradually in diameter from the base to the summit, where it terminates in the cupula.