Abstract:
:Striatal fast-spiking interneurons (FSIs) potently inhibit the output neurons of the striatum and, as such, powerfully modulate action learning. Through electrical synaptic coupling, FSIs are theorized to temporally coordinate their activity. This has important implications for their ability to temporally summate inhibition on downstream striatal projection neurons. While some in vivo single-unit electrophysiological recordings of putative FSIs support coordinated firing, others do not. Moreover, it is unclear as to what aspect of action FSIs encode. To address this, we used in vivo calcium imaging of genetically identified FSIs in freely moving mice and applied machine learning analyses to decipher the relationship between FSI activity and movement. We report that FSIs exhibit ensemble activity that encodes the speed of action sub-components, including ambulation and head movements. These results suggest FSI population dynamics fit within a Hebbian model for ensemble inhibition of striatal output guiding action.
journal_name
Brain Struct Functjournal_title
Brain structure & functionauthors
Roberts BM,White MG,Patton MH,Chen R,Mathur BNdoi
10.1007/s00429-019-01908-7subject
Has Abstractpub_date
2019-09-01 00:00:00pages
2567-2576issue
7eissn
1863-2653issn
1863-2661pii
10.1007/s00429-019-01908-7journal_volume
224pub_type
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