989 results found
    1. Neuroscience

    A causal role for the precuneus in network-wide theta and gamma oscillatory activity during complex memory retrieval

    Melissa Hebscher et al.
    Inhibitory noninvasive stimulation to the precuneus disrupts theta and gamma oscillatory coupling between medial temporal lobes and neocortical regions during complex personal memory retrieval.
    1. Neuroscience

    CA2 neuronal activity controls hippocampal low gamma and ripple oscillations

    Georgia M Alexander et al.
    Hippocampal area CA2 controls low gamma and ripple oscillations, brain waves known to be impaired in schizophrenia, implicating this important brain region in cognition.
    1. Neuroscience

    Entrainment and maintenance of an internal metronome in supplementary motor area

    Jaime Cadena-Valencia et al.
    Temporal rhythms are encoded in the supplementary motor area by firing rate oscillations and rhythmic bursts of gamma-band LFP activity.
    1. Computational and Systems Biology
    2. Neuroscience

    Noise promotes independent control of gamma oscillations and grid firing within recurrent attractor networks

    Lukas Solanka et al.
    Random fluctuations in neuronal firing may enable a single brain region, the medial entorhinal cortex, to perform distinct roles in cognition (by generating gamma waves) and spatial navigation (by producing a grid cell map).
    1. Neuroscience

    Resting-state gamma-band power alterations in schizophrenia reveal E/I-balance abnormalities across illness-stages

    Tineke Grent-'t-Jong et al.
    Resting-state MEG-activity and MRS-GABA/Glx measurements reveal that there is a significant shift in excitability during the course of schizophrenia, involving hyperexcitability during the onset and a reduction at chronic stages.
    1. Neuroscience

    Different theta frameworks coexist in the rat hippocampus and are coordinated during memory-guided and novelty tasks

    Víctor J López-Madrona et al.
    Integration and segregation of information of memory and sensory in the hippocampus could be achieved by the coordination of distinct theta-gamma coding frameworks.
    1. Neuroscience

    Rhythmic coordination of hippocampal neurons during associative memory processing

    Lara M Rangel et al.
    Different rhythms uniquely contribute to task-related processing in the hippocampus, and changes in the rhythmic profile of the hippocampus reflect dynamic coordination of its cell activity.
    1. Neuroscience

    Humans strategically shift decision bias by flexibly adjusting sensory evidence accumulation

    Niels A Kloosterman et al.
    Decision-makers are able to intentionally control neural excitability to strategically bias sensory evidence accumulation towards the decision bound that maximizes reward within a given ecological context.
    1. Neuroscience

    On cross-frequency phase-phase coupling between theta and gamma oscillations in the hippocampus

    Robson Scheffer-Teixeira, Adriano BL Tort
    Phase-locking of hippocampal theta and gamma waves has been proposed to support memory formation, but an analysis using robust statistical methods finds no convincing evidence for the phenomenon.
    1. Neuroscience

    Subthalamic nucleus gamma activity increases not only during movement but also during movement inhibition

    Petra Fischer et al.
    Sudden stopping of rhythmic movement is associated with a pronounced increase of 60-90 Hz gamma oscillations in the subthalamic nucleus, which have formerly been regarded as favouring movement.

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