Thalamic reticular control of local sleep in mouse sensory cortex

eLife

Gil Vantomme¹  Elidie Béard¹  Anita Lüthi¹  Romain Cardis¹  Laura MJ Fernandez¹  Alejandro Osorio-Forero¹ 

[1] Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland;

关键词: EEG;    LFP;    Ca2+ channel;    spectral power;    sleep spindles;    schizophrenia;   

DOI  :  10.7554/eLife.39111

来源: DOAJ

【 摘 要 】

Sleep affects brain activity globally, but many cortical sleep waves are spatially confined. Local rhythms serve cortical area-specific sleep needs and functions; however, mechanisms controlling locality are unclear. We identify the thalamic reticular nucleus (TRN) as a source for local, sensory-cortex-specific non-rapid-eye-movement sleep (NREMS) in mouse. Neurons in optogenetically identified sensory TRN sectors showed stronger repetitive burst discharge compared to non-sensory TRN cells due to higher activity of the low-threshold Ca2+ channel CaV3.3. Major NREMS rhythms in sensory but not non-sensory cortical areas were regulated in a CaV3.3-dependent manner. In particular, NREMS in somatosensory cortex was enriched in fast spindles, but switched to delta wave-dominated sleep when CaV3.3 channels were genetically eliminated or somatosensory TRN cells chemogenetically hyperpolarized. Our data indicate a previously unrecognized heterogeneity in a powerful forebrain oscillator that contributes to sensory-cortex-specific and dually regulated NREMS, enabling local sleep regulation according to use- and experience-dependence.

【 授权许可】

Unknown