2,614 results found
    1. Evolutionary Biology
    2. Genetics and Genomics

    Demographic reconstruction from ancient DNA supports rapid extinction of the great auk

    Jessica E Thomas et al.
    Reconstruction of great auk population dynamics suggests that hunting pressure alone could have been responsible for their extinction, demonstrating that even abundant, widespread species can be vulnerable to intense exploitation.
    1. Neuroscience

    Dopamine neurons drive fear extinction learning by signaling the omission of expected aversive outcomes

    Ximena I Salinas-Hernández et al.
    Dopamine signaling is necessary for normal fear extinction learning.
    1. Ecology

    Extinction risk and conservation of the world’s sharks and rays

    Nicholas K Dulvy et al.
    One-quarter of the Chondrichthyes have an elevated risk of extinction, mainly as a result of overfishing.
    1. Neuroscience

    Distinct signals in medial and lateral VTA dopamine neurons modulate fear extinction at different times

    Lili X Cai et al.
    Dopamine neurons in medial versus lateral VTA encode different signals during fear extinction, yet inhibition of both populations influences fear extinction, at different times.
    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

    Prefrontal dopamine regulates fear reinstatement through the downregulation of extinction circuits

    Natsuko Hitora-Imamura et al.
    Prefrontal dopamine regulates inhibition of fear extinction circuits in the infralimbic cortex and disinhibition of fear expression circuits in the amygdala, leading to fear reinstatement.
    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. Neuroscience

    Extinction recall of fear memories formed before stress is not affected despite higher theta activity in the amygdala

    Mohammed Mostafizur Rahman et al.
    When the fear-enhancing effects of prior exposure to stress are absent, the expression of fear reflects normal neural activity in the medial prefrontal cortex, not stress-induced hyperactivity in the amygdala.
    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. 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.

Refine your results by:

Type
Research categories