The goal of Project I is to define the dynamic properties of the olivo-cerebellar and neocortico-cerebellar circuits in the context of single cell physiological properties and neuronal connectivity. This project will address three interrelated specific aims. A: The role of different voltage and gated currents in Purkinje cell integration, from a molecular biological and biophysical perspective. This study will concern the (alpha1A channels and their regulation by PYK2 in native and heterologous expressed conditions, and in channelopathic systems. The results will be put into the context of two photon imaging and patch clamp electrophysiology. In addition, parallel/climbing fibers interaction on Purkinje cells concerning plasticity vs. dendritic cytotoxicity will be addressed. B: The role of electrotonic coupling and subthreshold oscillations in the organization of the olivocerebellar system will be studied as an example of a distributed parallel network. This effort will entail voltage-dependent dye imaging, intracellular recordings and mathematical modeling. C: Will attempt to determine the organization of inferior olivary dynamics and rhythmicity in relation to the control of movements by in vivo motor cortex stimulation in rodents.
| Choi, Soonwook; Yu, Eunah; Hwang, Eunjin et al. (2016) Pathophysiological implication of CaV3.1 T-type Ca2+ channels in trigeminal neuropathic pain. Proc Natl Acad Sci U S A 113:2270-5 |
| Choi, Soonwook; Yu, Eunah; Lee, Seongwon et al. (2015) Altered thalamocortical rhythmicity and connectivity in mice lacking CaV3.1 T-type Ca2+ channels in unconsciousness. Proc Natl Acad Sci U S A 112:7839-44 |
| Hensbroek, Robert A; Ruigrok, Tom J H; van Beugen, Boeke J et al. (2015) Visuo-vestibular information processing by unipolar brush cells in the rabbit flocculus. Cerebellum 14:578-83 |
| Winkelman, Beerend H J; Belton, Tim; Suh, Minah et al. (2014) Nonvisual complex spike signals in the rabbit cerebellar flocculus. J Neurosci 34:3218-30 |
| Hensbroek, Robert A; Belton, Tim; van Beugen, Boeke J et al. (2014) Identifying Purkinje cells using only their spontaneous simple spike activity. J Neurosci Methods 232:173-80 |
| Ivannikov, Maxim V; Sugimori, Mutsuyuki; Llinás, Rodolfo R (2013) Synaptic vesicle exocytosis in hippocampal synaptosomes correlates directly with total mitochondrial volume. J Mol Neurosci 49:223-30 |
| Chagnaud, Boris P; Zee, Michele C; Baker, Robert et al. (2012) Innovations in motoneuron synchrony drive rapid temporal modulations in vertebrate acoustic signaling. J Neurophysiol 107:3528-42 |
| Chagnaud, Boris P; Baker, Robert; Bass, Andrew H (2011) Vocalization frequency and duration are coded in separate hindbrain nuclei. Nat Commun 2:346 |
| Simpson, John I (2011) Crossing zones in the vestibulocerebellum: a commentary. Cerebellum 10:515-22 |
| Park, Young-Gyun; Park, Hye-Yeon; Lee, C Justin et al. (2010) Ca(V)3.1 is a tremor rhythm pacemaker in the inferior olive. Proc Natl Acad Sci U S A 107:10731-6 |
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