A novel inhibitory nucleo-cortical circuit controls cerebellar Golgi cell activity

Elife. 2015 May 12;4:e06262. doi: 10.7554/eLife.06262.

Abstract

The cerebellum, a crucial center for motor coordination, is composed of a cortex and several nuclei. The main mode of interaction between these two parts is considered to be formed by the inhibitory control of the nuclei by cortical Purkinje neurons. We now amend this view by showing that inhibitory GABA-glycinergic neurons of the cerebellar nuclei (CN) project profusely into the cerebellar cortex, where they make synaptic contacts on a GABAergic subpopulation of cerebellar Golgi cells. These spontaneously firing Golgi cells are inhibited by optogenetic activation of the inhibitory nucleo-cortical fibers both in vitro and in vivo. Our data suggest that the CN may contribute to the functional recruitment of the cerebellar cortex by decreasing Golgi cell inhibition onto granule cells.

Keywords: Golgi cells; cerebellar nuclei; cerebellum; inhibition; mouse; neuroscience.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cerebellar Cortex / physiology*
  • Cerebellar Nuclei / cytology*
  • Cerebellar Nuclei / physiology
  • Immunohistochemistry
  • Interneurons / physiology*
  • Luminescent Proteins
  • Mice
  • Models, Neurological*
  • Neural Pathways / physiology*
  • Optogenetics

Substances

  • Luminescent Proteins
  • red fluorescent protein

Grant support

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.