TY - JOUR A1 - Rodriguez-Rozada, Silvia A1 - Frantz, Stefan A1 - Tovote, Philip T1 - Cardiac optogenetics: regulating brain states via the heart JF - Signal Transduction and Targeted Therapy N2 - No abstract available. KW - cardiology KW - neurology KW - neuroscience KW - systems biology Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-357625 VL - 8 ER - TY - JOUR A1 - da Silva, Gabriela Neubert A1 - Seiffert, Nina A1 - Tovote, Philip T1 - Cerebellar contribution to the regulation of defensive states JF - Frontiers in Systems Neuroscience N2 - Despite fine tuning voluntary movement as the most prominently studied function of the cerebellum, early human studies suggested cerebellar involvement emotion regulation. Since, the cerebellum has been associated with various mood and anxiety-related conditions. Research in animals provided evidence for cerebellar contributions to fear memory formation and extinction. Fear and anxiety can broadly be referred to as defensive states triggered by threat and characterized by multimodal adaptations such as behavioral and cardiac responses integrated into an intricately orchestrated defense reaction. This is mediated by an evolutionary conserved, highly interconnected network of defense-related structures with functional connections to the cerebellum. Projections from the deep cerebellar nucleus interpositus to the central amygdala interfere with retention of fear memory. Several studies uncovered tight functional connections between cerebellar deep nuclei and pyramis and the midbrain periaqueductal grey. Specifically, the fastigial nucleus sends direct projections to the ventrolateral PAG to mediate fear-evoked innate and learned freezing behavior. The cerebellum also regulates cardiovascular responses such as blood pressure and heart rate-effects dependent on connections with medullary cardiac regulatory structures. Because of the integrated, multimodal nature of defensive states, their adaptive regulation has to be highly dynamic to enable responding to a moving threatening stimulus. In this, predicting threat occurrence are crucial functions of calculating adequate responses. Based on its role in prediction error generation, its connectivity to limbic regions, and previous results on a role in fear learning, this review presents the cerebellum as a regulator of integrated cardio-behavioral defensive states. KW - cerebellum KW - PAG KW - amygdala KW - prefrontal cortex KW - heart rate KW - fear KW - defensive states KW - prediction error Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-311620 VL - 17 ER -