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    1. Neuroscience

    Amount of fear extinction changes its underlying mechanisms

    Bobae An et al.
    The inhibition mechanism of fear extinction operates primarily in the early phase of extinction training, and the erasure mechanism takes over after that.
    1. Neuroscience

    Efficient and accurate extraction of in vivo calcium signals from microendoscopic video data

    Pengcheng Zhou et al.
    A new open-source computational toolbox for processing in vivo microendoscopic calcium imaging data performs signal demixing and denoising much more accurately than previously available methods, significantly improving the utility of this imaging modality.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Extraction of active RhoGTPases by RhoGDI regulates spatiotemporal patterning of RhoGTPases

    Adriana E Golding et al.
    Through visualization of directly-labeled RhoGTPase both in vitro and in vivo, RhoGDI is found to spatiotemporally regulate RhoGTPase activity through the extraction of active RhoGTPase.
    1. Neuroscience

    L-DOPA modulates activity in the vmPFC, nucleus accumbens, and VTA during threat extinction learning in humans

    Roland Esser et al.
    Encoding an expected, but absent, threat is modulated by dopaminergic neurotransmission that regulates success of extinction learning in humans.
    1. Physics of Living Systems

    Phylodynamic theory of persistence, extinction and speciation of rapidly adapting pathogens

    Le Yan et al.
    A model of pathogen co-evolving with host population continuously acquiring immunity is used to identify evolutionary parameters allowing pathogen population to persist without going extinct or splitting into independent lineages.
    1. Neuroscience

    Amygdala-ventral striatum circuit activation decreases long-term fear

    Susana S Correia et al.
    Behavior- or optogenetic-driven activation of a basolateral amygdala projection to the nucleus accumbens enhances infralimbic cortex activity and long-term fear extinction.
    1. Neuroscience

    Different methods of fear reduction are supported by distinct cortical substrates

    Belinda PP Lay et al.
    Extinction and overexpectation lead to the same behavioural outcome, that is, reduction in learned fear, but engage different cortical areas.
    1. Neuroscience

    More homogeneous capillary flow and oxygenation in deeper cortical layers correlate with increased oxygen extraction

    Baoqiang Li et al.
    Resting-state capillary blood flow and oxygenation are more homogeneous in the deeper cortical layers, underpinning an important mechanism by which the microvascular network adapts to an increased local oxidative metabolism.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Co-option of an endogenous retrovirus envelope for host defense in hominid ancestors

    Daniel Blanco-Melo et al.
    The reconstitution of a functional envelope protein from an extinct hominid retrovirus reveals its receptor and an ancient host defense that may have led to the extinction of the virus.
    1. Computational and Systems Biology

    Antibiotic-induced population fluctuations and stochastic clearance of bacteria

    Jessica Coates et al.
    The extinction of bacterial populations by antibiotics is stochastic and can be predicted only probabilistically, not deterministically.