2,481 results found
    1. Neuroscience

    Spatiotemporal patterns of neocortical activity around hippocampal sharp-wave ripples

    J Karimi Abadchi et al.
    The hippocampus and neocortex engage in waves of mutual excitation wherein a sharp wave-ripple may occur at any time before, during or after the peak of the hippocampal-neocortical activation.
    1. Neuroscience

    Impaired spatial learning and suppression of sharp wave ripples by cholinergic activation at the goal location

    Przemyslaw Jarzebowski et al.
    Elevated cholinergic activity disrupts offline hippocampal state and impairs memory formation highlighting the need for a precise timing of cholinergic activity in learning and memory.
    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

    Distinct hippocampal-cortical memory representations for experiences associated with movement versus immobility

    Jai Y Yu et al.
    During awake Sharp wave-ripple memory reactivation, hippocampal-cortical representations for movement- versus immobility-associated experiences are reactivated separately.
    1. Neuroscience

    Cell-specific synaptic plasticity induced by network oscillations

    Shota Zarnadze et al.
    Recordings of cellular and network activities of the mouse brain provide insights into how gamma rhythms contribute to memory formation.
    1. Neuroscience

    Multiple time-scales of decision-making in the hippocampus and prefrontal cortex

    Wenbo Tang et al.
    Hippocampal and prefrontal neuronal populations form slow behavioral-timescale (~seconds) and fast cognitive-timescale (~100 ms) sequential activity patterns as theta and replay sequences, which play distinct yet cooperative roles in memory-guided decision-making.
    1. Neuroscience

    Cholinergic modulation of hippocampal calcium activity across the sleep-wake cycle

    Heng Zhou et al.
    Dynamic calcium activity in the hippocampus changes markedly across behavioral and physiological states and depends on muscarinic acetylcholine receptor activation.
    1. Neuroscience

    Alterations of in vivo CA1 network activity in Dp(16)1Yey Down syndrome model mice

    Matthieu Raveau et al.
    CA1 physiology is altered in the hippocampus of Down syndrome mice during both spatial exploration and rest, paralleled by an increase in populations of interneurons responsible for single cell and network synchronization.
    1. Neuroscience

    mPFC spindle cycles organize sparse thalamic activation and recently active CA1 cells during non-REM sleep

    Carmen Varela, Matthew A Wilson
    Sleep spindles provide a temporal framework to organize the reactivation of behaviorally relevant CA1 cells and sparsely active cells in the limbic thalamus.
    1. Evolutionary Biology

    Can Hamilton’s rule be violated?

    Matthijs van Veelen
    Hamilton's rule can be violated when costs and benefits of cooperation are defined using the counterfactual method, and when they depend on the cooperation of others.

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