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1. The structure of the sense of balanceThe 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.) |