The cerebellum contributes to generalized seizures by altering activity in the ventral posteromedial nucleus.

ABSTRACT: Thalamo-cortical networks are central to seizures, yet it is unclear how these circuits initiate seizures. We test whether a facial region of the thalamus, the ventral posteromedial nucleus (VPM), is a source of generalized, convulsive motor seizures and if convergent VPM input drives the behavior. To address this question, we devise an in vivo optogenetic mouse model to elicit convulsive motor seizures by driving these inputs and perform single-unit recordings during awake, convulsive seizures to define the local activity of thalamic neurons before, during, and after seizure onset. We find dynamic activity with biphasic properties, raising the possibility that heterogenous activity promotes seizures. Virus tracing identifies cerebellar and cerebral cortical afferents as robust contributor

SUBMITTER: Beckinghausen J 

PROVIDER: S-EPMC10349834 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature