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The Vestibular System

The Vestibular System

The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.

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VisioTracker, an Innovative Automated Approach to Oculomotor Analysis

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Tiltable objective microscope visualizes selectivity for head motion direction and dynamics in zebrafish vestibular

Masashi Tanimoto^1,2, Ikuko Watakabe^3,4, Shin-Ichi Higashijima^5,6

¹Division of Behavioral Neurobiology, National Institute for Basic Biology, Okazaki, Aichi, 444-8787, Japan. tanimoto@nibb.ac.jp.

Nature Communications

|December 21, 2022

Summary

This study reveals how vestibular hair cells in zebrafish distinguish between head vibration and static tilt. Striolar cells detect vibration, while extrastriolar cells sense tilt, preserving this organization in connected neurons.

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Last Updated: Aug 16, 2025

VisioTracker, an Innovative Automated Approach to Oculomotor Analysis

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Published on: October 12, 2011

Using the optokinetic response to study visual function of zebrafish

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In Vivo Calcium Imaging of Lateral-line Hair Cells in Larval Zebrafish

In Vivo Calcium Imaging of Lateral-line Hair Cells in Larval Zebrafish

Published on: November 28, 2018

Area of Science:

Neuroscience
Vestibular System Research
Sensory Biology

Background:

Spatio-temporal information on head orientation is crucial for balance and motion perception.
Hair cells (HCs) in otolith organs transduce linear acceleration, including head tilt and vibration.

Purpose of the Study:

To investigate the topographic responses of utricular hair cells and ganglion neurons to static tilt and vibration.
To understand how direction and stimulus dynamics are encoded in the vestibular periphery.

Main Methods:

Developed a tiltable objective microscope for simultaneous tilting of lens and specimen.
Performed in vivo Ca2+ imaging of all utricular HCs and ganglion neurons in larval zebrafish.
Applied 360° static tilt and vibration stimuli along pitch and roll axes.

Main Results:

Identified distinct stimulus selectivity: head vibration preferentially activates striolar HCs, while static tilt activates extrastriolar HCs.
Demonstrated that the spatial ordering of direction preference in HCs correlates with hair-bundle polarity.
Showed that this topographic organization is maintained in innervating ganglion neurons.

Conclusions:

The vestibular periphery exhibits topographically organized selectivity for both direction and dynamics of head movement.
This organization is fundamental for processing complex spatio-temporal information related to balance and motion.