1,657 results found
    1. Neuroscience

    Chronic 2P-STED imaging reveals high turnover of dendritic spines in the hippocampus in vivo

    Thomas Pfeiffer et al.
    Super-resolution STED microscopy is demonstrated for the first time in the deeply embedded mouse hippocampus in vivo, revealing direct evidence for an unprecedentedly high level of synapse remodeling in a brain structure closely associated with memory processing.
    1. Neuroscience

    Uncovering temporal structure in hippocampal output patterns

    Kourosh Maboudi et al.
    Machine learning models of coordinated hippocampal ensemble activity during sharp wave ripple activity encode structure that mirrors the place cell map expressed during exploration, and enable a new paradigm for analyzing and understanding this offline activity.
    1. Neuroscience

    PACAP neurons in the ventral premammillary nucleus regulate reproductive function in the female mouse

    Rachel A Ross et al.
    Genetic and pharmacological approaches demonstrate that pituitary adenylate cyclase-activating polypeptide neurons from the ventral premamillary nucleus of the hypothalamus regulate reproductive function by modulating the activity of a subset of Kiss1 neurons in the female mouse.
    1. Cell Biology
    2. Genetics and Genomics
    3. Evolutionary Biology

    Phylogenetic divergence of cell biological features

    Michael Lynch
    Cell biological features are subject to stochastic forces of mutation and random genetic drift, which together cause lineages exposed to identical selection pressures to diverge, and mean phenotypes to deviate from expectations under optimizing selection.
    1. Neuroscience

    Mediodorsal thalamus is required for discrete phases of goal-directed behavior in macaques

    Evan Wicker et al.
    Transient suppression of activity in the macaque mediodorsal thalamus impairs adjustment of secondary reinforcer values and disrupts appropriate action selection in a reinforcer devaluation task; this profile is distinct from that of amygdala or subregions of orbitofrontal cortex.
    1. Neuroscience

    Rem2 stabilizes intrinsic excitability and spontaneous firing in visual circuits

    Anna R Moore et al.
    In vivo and ex vivo analysis of the activity-regulated gene Rem2 in the mouse visual system sheds new light on the contribution of intrinsic excitability in circuit plasticity.
    1. Neuroscience

    Striatal action-value neurons reconsidered

    Lotem Elber-Dorozko, Yonatan Loewenstein
    The numerous reports in support of action-value representation in the striatum are based on statistical analyses that are subject to two critical confounds and, thus, this long-held belief of striatal action-value representation should be retested using different experiments and analyses.
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    Neolithic and medieval virus genomes reveal complex evolution of hepatitis B

    Ben Krause-Kyora et al.
    Ancient hepatitis B virus (HBV) genomes were reconstructed from up to 7000-year-old Stone Age human skeletons, suggesting a long-time complex co-evolution with human populations.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Systematic studies of all PIH proteins in zebrafish reveal their distinct roles in axonemal dynein assembly

    Hiroshi Yamaguchi et al.
    Zebrafish genetics and cryo-electron tomography reveal distinct roles of all vertebrate PIH family proteins in axonemal dynein assembly and cilia/flagella motions, assigning specific dynein subtypes to each PIH protein.
    1. Cell Biology
    2. Developmental Biology

    Lamellar projections in the endolymphatic sac act as a relief valve to regulate inner ear pressure

    Ian A Swinburne et al.
    The pressure of fluid in the inner ear is controlled by opening of cellular valves in the endolymphatic sac to allow for regulated transepithelial fluid flow.

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