anatomical investigation of potential contacts between climbing fibers and cerebellar golgi cells in the mouse

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ID: 252960
2013
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Abstract
Climbing fibers (CFs) originating in the inferior olive (IO) constitute one of the main inputs to the cerebellum. In the mammalian cerebellar cortex each of them climbs into the dendritic tree of up to ten Purkinje cells where they make hundreds of synaptic contacts and elicit the so-called all-or-none complex spikes controlling the output. While it has been proven that CFs contact molecular layer interneurons (MLIs) via spillover mechanisms, it remains to be elucidated to what extent CFs contact the main type of interneuron in the granular layer, i.e. the Golgi cells (GoCs). This issue is particularly relevant, because direct contacts would imply that CFs can also control computations at the input stage of the cerebellar cortical network. Here, we performed a systematic morphological investigation of labeled CFs and GoCs at the light microscopic level following their path and localization through the neuropil in both the granular and molecular layer. Whereas the appositions of CFs to Purkinje cells, stellate cells and basket cells in the molecular layer were prominent and numerous, those to cell-bodies and dendrites of GoCs in both the granular layer and molecular layer were virtually absent. Our results argue against the functional significance of direct synaptic contacts between CFs and interneurons at the input stage, but support those at the output stage.
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egalliano2013frontiersanatomical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Elisa eGalliano;Marco eBaratella;Martina eSgritta;Martina eSgritta;Tom J.H. Ruigrok;Elize D. Haasdijk;Freek E. Hoebeek;Egidio eD‘Angelo;Egidio eD‘Angelo;Dick eJaarsma;Chris I De Zeeuw;Chris I De Zeeuw
Journal Fish physiology and biochemistry
Year 2013
DOI
10.3389/fncir.2013.00059
URL
http://journal.frontiersin.org/Journal/10.3389/fncir.2013.00059/full
Keywords
cerebellum synapse confocal microscopy neuropsychiatry biological psychiatry

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