190 results found
    1. Neuroscience

    Neurovascular coupling and bilateral connectivity during NREM and REM sleep

    Kevin L Turner et al.
    Sleep-related hemodynamic signals are much larger than those in the awake brain, so it is crucial to monitor the arousal state during studies of spontaneous activity.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    PIP2 depletion promotes TRPV4 channel activity in mouse brain capillary endothelial cells

    Osama F Harraz et al.
    TRPV4 channels in brain capillaries are suppressed by the phosphoinositide PIP2 and activated by receptor agonists implicated in neurovascular coupling.
    1. Neuroscience

    Cell type specificity of neurovascular coupling in cerebral cortex

    Hana Uhlirova et al.
    Excitatory and inhibitory cortical neurons drive parallel vasodilatory pathways, while vasoconstriction is mediated exclusively by inhibition acting via Neuropeptide Y binding to Y1 receptors.
    1. Neuroscience

    Blood Flow: Supplying the sleeping brain

    Stephanie D Williams, Laura D Lewis
    During sleep, the brain experiences large fluctuations in blood volume and altered coupling between neural and vascular signals.
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    1. Neuroscience

    nNOS-expressing interneurons control basal and behaviorally evoked arterial dilation in somatosensory cortex of mice

    Christina T Echagarruga et al.
    The diameter of cortical arteries is not controlled by the overall neural activity, but rather by a subset of specialized neurons.
    1. Neuroscience

    Using an achiasmic human visual system to quantify the relationship between the fMRI BOLD signal and neural response

    Pinglei Bao et al.
    The lower-level retinotopic visual cortex of humans born without the optic chiasm comprises two independent neuronal populations and forms a versatile model for quantifying the relationship between the fMRI BOLD signal and neural response.
    1. Neuroscience

    Rapid regulation of vesicle priming explains synaptic facilitation despite heterogeneous vesicle:Ca2+ channel distances

    Janus RL Kobbersmed et al.
    Heterogeneous distances between vesicles and Ca2+-channels make synapses prone to short-term depression, however, Ca2+-dependent increases in the number of release-ready vesicles supports facilitation even with broadly distributed vesicle:Ca2+-channel distances.
    1. Neuroscience

    Capillary pericytes express α-smooth muscle actin, which requires prevention of filamentous-actin depolymerization for detection

    Luis Alarcon-Martinez et al.
    Pericytes surrounding capillaries in the retina contain α-smooth muscle actin, demonstrating that pericytes have the necessary molecular machinery to change capillary diameter during neurovascular coupling.
    1. Neuroscience

    Nanodomain coupling explains Ca2+ independence of transmitter release time course at a fast central synapse

    Itaru Arai, Peter Jonas
    Ca2+ channels and release sensors at a fast central synapse are tightly coupled, which minimizes the effect of extracellular Ca2+ concentration on the timing of transmitter release.
    1. Neuroscience

    Cortex-wide BOLD fMRI activity reflects locally-recorded slow oscillation-associated calcium waves

    Miriam Schwalm et al.
    Locally recorded calcium events related to slow wave activity show a global cortical fMRI BOLD correlate, establishing a direct relation between a basic neurophysiological signal and the macroscopic perspective of pre-clinical fMRI.

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