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1. The structure of the sense of balance

The structure of the sense of balance is described in the volume of "Medical Terms" (2007) published by  the Finnish Medical Society as follows: The sense of balance is located in both inner ears. Each of them consists of semi-circular canals and the utricle and the saccule. The canals are at right angles to each other: a horizontal, a posterior and a superior canal. They all contain fluid and calcium stones, which are located in a jelly-like bed with hair-cells in the utricle and saccule. The vestibular nerve (part of cochlear nerve) transmits impulses from the receptors of the sense balance and movement to the central nervous system.

Picture 1 The Sense of Balance (Rahko);  graphics Leila Nieminen adpt.)