1,425 results found
    1. Neuroscience

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

    Pinglei Bao, Christopher J Purington, Bosco S Tjan
    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

    Response to short-term deprivation of the human adult visual cortex measured with 7T BOLD

    Paola Binda, Jan W Kurzawski ... Maria Concetta Morrone
    Two hour deprivation of vision in one eye transiently boosts the representation of the deprived eye (suppressing the non-deprived eye) in adult human V1 and along the ventral pathway.
    1. Neuroscience

    Perception is associated with the brain’s metabolic response to sensory stimulation

    Mauro DiNuzzo, Silvia Mangia ... Federico Giove
    Perceived and unperceived visual stimuli that are contrast matched to produce similar BOLD responses in V1 elicit clearly distinct changes in the neurochemical profile, implying a perception-related dissociation between neurometabolic and neurovascular response.
    1. Neuroscience

    A quadratic model captures the human V1 response to variations in chromatic direction and contrast

    Michael A Barnett, Geoffrey K Aguirre, David Brainard
    A quantitative forward model captures fMRI responses to chromatic stimuli in human primary visual cortex and quantifies how chromatic sensitivity changes with eccentricity.
    1. Neuroscience

    Resting-state fMRI signals contain spectral signatures of local hemodynamic response timing

    Sydney M Bailes, Daniel EP Gomez ... Laura D Lewis
    The frequency content of resting-state fMRI signals contains information that can characterize and predict local variations in hemodynamic response timing which enhances the temporal precision of fMRI.
    1. Neuroscience

    Robust group- but limited individual-level (longitudinal) reliability and insights into cross-phases response prediction of conditioned fear

    Maren Klingelhöfer-Jens, Mana R Ehlers ... Tina B Lonsdorf
    Reliability and predictability analyses beyond standard measures provide empirically based guidance regarding the design of fear conditioning tasks to assess individual differences and group-level inferences cross-sectionally and longitudinally.
    1. Neuroscience

    Task-related hemodynamic responses in human early visual cortex are modulated by task difficulty and behavioral performance

    Charlie S Burlingham, Minyoung Ryoo ... Elisha P Merriam
    The fMRI-BOLD signal in human early visual cortex reflects alertness and behavioral performance on the timescale of individual trials.
    1. Neuroscience

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

    Miriam Schwalm, Florian Schmid ... Albrecht Stroh
    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.
    1. Neuroscience

    Improving emotional-action control by targeting long-range phase-amplitude neuronal coupling

    Bob Bramson, Hanneke EM den Ouden ... Karin Roelofs
    Non-invasive manipulation of endogenously coupled neural rhythms enhances human control of social-emotional actions.
    1. Neuroscience

    Neuromodulation of striatal D1 cells shapes BOLD fluctuations in anatomically connected thalamic and cortical regions

    Marija Markicevic, Oliver Sturman ... Nicole Wenderoth
    The structural characteristics of a circuit and its hierarchical dimensions are shown to influence regional time-series dynamics after targeted cellular-level manipulations.

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