ZFIN ID: ZDB-PUB-120702-13
The Tangential Nucleus Controls a Gravito-inertial Vestibulo-ocular Reflex
Bianco, I.H., Ma, L.H., Schoppik, D., Robson, D.N., Orger, M.B., Beck, J.C., Li, J.M., Schier, A.F., Engert, F., and Baker, R.
Date: 2012
Source: Current biology : CB 22(14): 1285-1295 (Journal)
Registered Authors: Baker, Robert, Beck, James, Bianco, Isaac, Engert, Florian, Ma, Leung-Hang Omicron, Orger, Mike, Schier, Alexander, Schoppik, David
Keywords: none
MeSH Terms:
  • Animals
  • Eye Movements*
  • Gravitation
  • Larva/growth & development
  • Larva/physiology
  • Laser Therapy
  • Otolithic Membrane/physiopathology
  • Reflex, Vestibulo-Ocular*
  • Saccule and Utricle/physiology
  • Saccule and Utricle/surgery
  • Signal Transduction
  • Vestibular Nuclei/physiology*
  • Vestibular Nuclei/surgery
  • Visual Perception*
  • Zebrafish/growth & development
  • Zebrafish/physiology*
PubMed: 22704987 Full text @ Curr. Biol.
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ABSTRACT

Background

Although adult vertebrates sense changes in head position by using two classes of accelerometer, at larval stages zebrafish lack functional semicircular canals and rely exclusively on their otolithic organs to transduce vestibular information.

Results

Despite this limitation, we find that larval zebrafish perform an effective vestibulo-ocular reflex (VOR) that serves to stabilize gaze in response to pitch and roll tilts. By using single-cell electroporations and targeted laser ablations, we identified a specific class of central vestibular neurons, located in the tangential nucleus, that are essential for the utricle-dependent VOR. Tangential nucleus neurons project contralaterally to extraocular motoneurons and in addition to multiple sites within the reticulospinal complex.

Conclusions

We propose that tangential neurons function as a broadband inertial accelerometer, processing utricular acceleration signals to control the activity of extraocular and postural neurons, thus completing a fundamental three-neuron circuit responsible for gaze stabilization.

ADDITIONAL INFORMATIONNo data available