V.6.1. The anatomy of the balance and position

Figure 3. Source: http://www.mozaweb.hu/Lecke-Biologia-Biologia_11-A_halloszerv_felepitese_es_mukodese_az_egyensuly_erzekelese-102531

Semicircular canals: this is where the nerve motion sensors are. It also detects the head’s accelerating and slowing motions.

The position sensing receptor is in the labyrinth. The parts of the labyrinth are the semicircular canals, the ampulla and the vestibule.  The ampulla and the vestibule detect the head’s spatial position. The cavity of the ampulla and vestibule is filled with liquid. In their walls are the 1-1 receptors with hair cells, covered by a gelatinous substance. The sac and the vestibule are separated into 3-3 semicircular canals.

The semicircular canals are also filled with liquid, which runs with the liquid of the vestibule. The movement of this liquid serves the stimulation of the head movement.

Figure. Ssource: http://www.mozaweb.hu/Lecke-biologia-Biologia_11-A_halloszerv_felepitese_es_mukodese_az egyensuly_erzekelese-102531

The inner ear is filled with fluid and is separated from the middle ear by the oval window and the receptor cells can be found inside it.