NK Logothetis
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View article: Generalized phase locking analysis: a multivariate technique for investigating spike-field coupling
Generalized phase locking analysis: a multivariate technique for investigating spike-field coupling Open
View article: ACC single unit and neuronal population correlates of response conflict versus and error detection in a novel rodent near mistake paradigm
ACC single unit and neuronal population correlates of response conflict versus and error detection in a novel rodent near mistake paradigm Open
It is debated whether the anterior cingulate cortex (ACC) detects errors or response conflict because population (EEG) measures support both accounts. One way to disambiguate conflict and errors is to measure near mistakes which, in humans…
View article: Noradrenergic locus coeruleus ensembles fire at distinct times to evoke different cortical states in rat prefrontal cortex
Noradrenergic locus coeruleus ensembles fire at distinct times to evoke different cortical states in rat prefrontal cortex Open
The Locus Coeruleus (LC), a noradrenergic brain stem nucleus projecting throughout the forebrain, is thought to act as an undifferentiated state controller across all forebrain targets because LC neurons spike synchronously [1, 2]. However…
View article: Signatures of criticality observed in efficient coding networks
Signatures of criticality observed in efficient coding networks Open
Over the last decades, multiple studies have reported signatures of criticality observed in various neuronal recordings. Moreover, theoretical investigations demonstrate that multiple aspects of information processing are optimized at the …
View article: Separate ACC single unit ensembles encode conflict versus errors in a novel rodent partial error paradigm
Separate ACC single unit ensembles encode conflict versus errors in a novel rodent partial error paradigm Open
View article: Mechanisms of the non-linear interactions between the neuronal and neurotransmitter systems explained by causal whole-brain modeling
Mechanisms of the non-linear interactions between the neuronal and neurotransmitter systems explained by causal whole-brain modeling Open
View article: Early Detection and Monitoring of Cerebral Ischemia Using a Calcium Responsive MRI Probe
Early Detection and Monitoring of Cerebral Ischemia Using a Calcium Responsive MRI Probe Open
View article: Higher Criticism of Neural Signals
Higher Criticism of Neural Signals Open
View article: Signal detection in extracellular neural ensemble recordings using higher criticism
Signal detection in extracellular neural ensemble recordings using higher criticism Open
Information processing in the brain is conducted by a concerted action of multiple neural populations. Gaining insights in the organization and dynamics of such populations can best be studied with broadband intracranial recordings of so-c…
View article: Dynamic Connectivity related to System and Synaptic Memory Consolidation
Dynamic Connectivity related to System and Synaptic Memory Consolidation Open
View article: Distinct activity patterns in neuromodulatory centers are associated with differential modulation of cortical low and high gamma oscillations
Distinct activity patterns in neuromodulatory centers are associated with differential modulation of cortical low and high gamma oscillations Open
Neuromodulatory systems are thought to gate cortical neuronal excitability — a generalized state consisting of high frequency (20–200 Hz) local field potential (LFP) oscillations. Stimulating neuromodulatory centers evokes a non-specific r…
View article: Neural activity suppression in the mediodorsal thalamus precedes the occurrence of hippocampal ripples
Neural activity suppression in the mediodorsal thalamus precedes the occurrence of hippocampal ripples Open
Highly synchronized oscillations, or ripples (~200Hz), are generated in the hippocampus (HPC) during awake immobility or non-REM (NREM) sleep and has long been suggested to mediate the hippocampal-cortical communication underlying memory c…
View article: Concurrent multisite recordings and brain imaging: a study of events related system and synaptic memory consolidation
Concurrent multisite recordings and brain imaging: a study of events related system and synaptic memory consolidation Open
Experimental work in animals and humans suggests that various oscillatory patterns, including single or multiple cycle short-lasting episodes, reflect state-changes in self-organizing largescale networks. For instance, patterns like K-comp…
View article: Perisynaptic activity in the prefrontal cortex reflects spontaneous transitions in conscious visual perception
Perisynaptic activity in the prefrontal cortex reflects spontaneous transitions in conscious visual perception Open
In binocular rivalry, our perception alternates spontaneously between mutually exclusive or mixed interpretations, although the physical stimulus remains constant. This enables us to study visual consciousness, as it allows for a dissociat…
View article: Generalized phase locking analysis of electrophysiology data
Generalized phase locking analysis of electrophysiology data Open
Brain information processing likely relies on cooperative interactions between neural populations at multiple scales. Growing evidence suggests that network oscillations, as observed in Local Field Potentials (LFP), are instrumental to the…
View article: Concurrent Physiological Multisite-Recordings Brain Imaging: Study of Dynamic Connectivity Related to System and Synaptic Memory Consolidation
Concurrent Physiological Multisite-Recordings Brain Imaging: Study of Dynamic Connectivity Related to System and Synaptic Memory Consolidation Open
Experimental work in animals and humans suggests that various short-lasting patterns of neural activity, including single- or multiple-cycle oscillatory episodes, may reflect state changes of self-organizing large-scale networks. Such stat…
View article: Effects of Cholinergic Neuromodulation on fMRI-and neural responses in Macaque Visual Cortex
Effects of Cholinergic Neuromodulation on fMRI-and neural responses in Macaque Visual Cortex Open
Purpose: Neuromodulators alter the input-output relationship of neural circuits and their energy expenditure, with concomitant effects on the hemodynamic response, and thereby neuromodulators can affect functional magnetic resonance (fMRI)…
View article: Fast fMRI in nonhuman primates at 4.7T with multiband EPI and a 4 Tx/Rx + 1 Rx phased-array concept
Fast fMRI in nonhuman primates at 4.7T with multiband EPI and a 4 Tx/Rx + 1 Rx phased-array concept Open
Purpose / Introduction Physiology of neural systems in the brain is a field where fMRI unfolds its unique potentials (i.e. spatial coverage, noninvasiveness), but also clearly shows its limitations. The current technical possibilities comb…
View article: Hippocampal Sharp-Wave Ripples Influence Selective Activation of the Default Mode Network
Hippocampal Sharp-Wave Ripples Influence Selective Activation of the Default Mode Network Open
The default mode network (DMN) is a commonly observed resting-state network (RSN) that includes medial temporal, parietal, and prefrontal regions involved in episodic memory [1-3]. The behavioral relevance of endogenous DMN activity remain…
View article: NET-fMRI of Large-Scale Brain Networks: Mapping Dynamic Connectivity during Epochs of Synaptic and System Consolidation
NET-fMRI of Large-Scale Brain Networks: Mapping Dynamic Connectivity during Epochs of Synaptic and System Consolidation Open
View article: LAMINAR DIFFERENCES IN NEURAL ACTIVITY DURING POSITIVE AND NEGATIVE BOLD CONDITIONS
LAMINAR DIFFERENCES IN NEURAL ACTIVITY DURING POSITIVE AND NEGATIVE BOLD CONDITIONS Open
There is still debate whether negative BOLD responses have a neural or vascular origin. Laminar differences in neurovascular coupling have also been observed during the negative-BOLD response. We investigated whether these differences have…