Michał Tomasz Kucewicz - Publications - Bridge of Knowledge

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Year 2018
  • Closed-loop stimulation of temporal cortex rescues functional networks and improves memory
    Publication
    • Y. Ezzyat
    • P. A. Wanda
    • D. F. Levy
    • A. Kadel
    • A. Aka
    • I. Pedisich
    • M. R. Sperling
    • A. Sharan
    • B. C. Lega
    • A. Burks... and 12 others

    - Nature Communications - Year 2018

    Memory failures are frustrating and often the result of ineffective encoding. One approach to improving memory outcomes is through direct modulation of brain activity with electrical stimulation. Previous efforts, however, have reported inconsistent effects when using open-loop stimulation and often target the hippocampus and medial temporal lobes. Here we use a closed-loop system to monitor and decode neural activity from direct...

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  • Electrical Stimulation Modulates High Gamma Activity and Human Memory Performance
    Publication

    - eNeuro - Year 2018

    Direct electrical stimulation of the brain has emerged as a powerful treatment for multiple neurological diseases, and as a potential technique to enhance human cognition. Despite its application in a range of brain disorders, it remains unclear how stimulation of discrete brain areas affects memory performance and the underlying electrophysiological activities. Here, we investigated the effect of direct electrical stimulation...

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  • Human memory enhancement through electrical stimulation in the temporal cortex
    Publication
    • M. T. Kucewicz
    • B. M. Berry
    • L. R. Miller
    • F. Khadjevand
    • Y. Ezzyat
    • J. M. Stein
    • V. Kremen
    • B. H. Brinkmann
    • P. Wanda
    • M. R. Sperling... and 10 others

    - Brain: A Journal of Neurology - Year 2018

    Direct electrical stimulation of the human brain can elicit sensory and motor perceptions as well as recall of memories. Stimulating higher order association areas of the lateral temporal cortex in particular was reported to activate visual and auditory memory representations of past experiences (Penfield and Perot, 1963). We hypothesized that this effect could be used to modulate memory processing. Recent attempts at memory enhancement...

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  • Pupil size reflects successful encoding and recall of memory in humans
    Publication
    • M. T. Kucewicz
    • J. Dolezal
    • V. Kremen
    • B. M. Berry
    • L. R. Miller
    • A. L. Magee
    • V. Fabian
    • G. A. Worrell

    - Scientific Reports - Year 2018

    Pupil responses are known to indicate brain processes involved in perception, attention and decision-making. They can provide an accessible biomarker of human memory performance and cognitive states in general. Here we investigated changes in the pupil size during encoding and recall of word lists. Consistent patterns in the pupil response were found across and within distinct phases of the free recall task. The pupil was most...

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  • Ripple oscillations in the left temporal neocortex are associated with impaired verbal episodic memory encoding
    Publication
    • Z. Waldman
    • L. Camarillo-Rodriguez
    • I. Chervenova
    • B. Berry
    • S. Shimamoto
    • B. Elahian
    • M. T. Kucewicz
    • C. Ganne
    • X. He
    • L. A. Davis... and 17 others

    - EPILEPSY & BEHAVIOR - Year 2018

    BACKGROUND: We sought to determine if ripple oscillations (80-120 Hz), detected in intracranial electroencephalogram (iEEG) recordings of patients with epilepsy, correlate with an enhancement or disruption of verbal episodic memory encoding. METHODS: We defined ripple and spike events in depth iEEG recordings during list learning in 107 patients with focal epilepsy. We used logistic regression models (LRMs) to investigate the...

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  • Visually validated semi-automatic high-frequency oscillation detection aides the delineation of epileptogenic regions during intra-operative electrocorticography
    Publication
    • S. A. Weiss
    • B. Berry
    • I. Chervoneva
    • Z. Waldman
    • J. Guba
    • M. R. Bower
    • M. T. Kucewicz
    • B. Brinkmann
    • V. Kremen
    • F. Khadjevand... and 8 others

    - Clinical Neurophysiology - Year 2018

    OBJECTIVE: To test the utility of a novel semi-automated method for detecting, validating, and quantifying high-frequency oscillations (HFOs): ripples (80-200 Hz) and fast ripples (200-600 Hz) in intra-operative electrocorticography (ECoG) recordings. METHODS: Sixteen adult patients with temporal lobe epilepsy (TLE) had intra-operative ECoG recordings at the time of resection. The computer-annotated ECoG recordings were visually...

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Year 2017
  • Behavioral state classification in epileptic brain using intracranial electrophysiology
    Publication
    • V. Kremen
    • J. J. Duque
    • B. Brinkmann
    • B. M. Berry
    • M. T. Kucewicz
    • F. Khadjevand
    • J. Van Gompel
    • M. Stead
    • E. K. ST.Louis
    • G. A. Worrell

    - Journal of Neural Engineering - Year 2017

    OBJECTIVE: Automated behavioral state classification can benefit next generation implantable epilepsy devices. In this study we explored the feasibility of automated awake (AW) and slow wave sleep (SWS) classification using wide bandwidth intracranial EEG (iEEG) in patients undergoing evaluation for epilepsy surgery. APPROACH: Data from seven patients (age [Formula: see text], 4 women) who underwent intracranial depth electrode...

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  • Direct brain stimulation modulates encoding states and memory performance in humans
    Publication
    • Y. Ezzyat
    • J. E. Kragel
    • J. F. Burke
    • D. F. Levy
    • A. Lyalenko
    • P. Wanda
    • L. O'Sullivan
    • K. B. Hurley
    • S. Busygin
    • I. Pedisich... and 16 others

    - CURRENT BIOLOGY - Year 2017

    People often forget information because they fail to effectively encode it. Here, we test the hypothesis that targeted electrical stimulation can modulate neural encoding states and subsequent memory outcomes. Using recordings from neurosurgical epilepsy patients with intracranially implanted electrodes, we trained multivariate classifiers to discriminate spectral activity during learning that predicted remembering from forgetting,...

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  • Dissecting gamma frequency activities during human memory processing
    Publication
    • M. T. Kucewicz
    • B. M. Berry
    • V. Kremen
    • B. H. Brinkmann
    • M. R. Sperling
    • B. C. Jobst
    • R. E. Gross
    • B. Lega
    • S. A. Sheth
    • J. M. Stein... and 6 others

    - Brain: A Journal of Neurology - Year 2017

    Gamma frequency activity (30-150 Hz) is induced in cognitive tasks and is thought to reflect underlying neural processes. Gamma frequency activity can be recorded directly from the human brain using intracranial electrodes implanted in patients undergoing treatment for drug-resistant epilepsy. Previous studies have independently explored narrowband oscillations in the local field potential and broadband power increases. It is not...

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  • Reactivation of seizure‐related changes to interictal spike shape and synchrony during postseizure sleep in patients
    Publication
    • M. R. Bower
    • M. T. Kucewicz
    • E. K. St. Louis
    • F. Meyer
    • W. R. Marsh
    • M. Stead
    • G. A. Worrell

    - EPILEPSIA - Year 2017

    OBJECTIVE: Local field potentials (LFPs) arise from synchronous activation of millions of neurons, producing seemingly consistent waveform shapes and relative synchrony across electrodes. Interictal spikes (IISs) are LFPs associated with epilepsy that are commonly used to guide surgical resection. Recently, changes in neuronal firing patterns observed in the minutes preceding seizure onset were found to be reactivated during postseizure...

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  • Widespread theta synchrony and high-frequency desynchronization underlies enhanced cognition
    Publication
    • E. Solomon
    • J. Kragiel
    • M. R. Sperling
    • A. Sharan
    • G. Worrell
    • M. T. Kucewicz
    • C. S. Inman
    • B. Lega
    • K. A. Davis
    • J. M. Stein... and 5 others

    - Nature Communications - Year 2017

    The idea that synchronous neural activity underlies cognition has driven an extensive body of research in human and animal neuroscience. Yet, insufficient data on intracranial electrical connectivity has precluded a direct test of this hypothesis in a whole-brain setting. Through the lens of memory encoding and retrieval processes, we construct whole-brain connectivity maps of fast gamma (30-100 Hz) and slow theta (3-8 Hz) spectral...

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Year 2016
Year 2015
  • Evidence for consolidation of neuronal assemblies after seizures in humans
    Publication
    • M. R. Bower
    • M. Stead
    • R. S. Bower
    • M. T. Kucewicz
    • V. Sulc
    • J. Cymbalnik
    • B. H. Brinkmann
    • V. Vasoli
    • E. K. ST.Louis
    • F. Meyer... and 2 others

    - Journal of Neuroscience - Year 2015

    The establishment of memories involves reactivation of waking neuronal activity patterns and strengthening of associated neural circuits during slow-wave sleep (SWS), a process known as "cellular consolidation" (Dudai and Morris, 2013). Reactivation of neural activity patterns during waking behaviors that occurs on a timescale of seconds to minutes is thought to constitute memory recall (O'Keefe and Nadel, 1978), whereas consolidation...

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  • Gamma oscillations precede interictal epileptiform spikes in the seizure onset zone
    Publication
    • L. Ren
    • M. T. Kucewicz
    • J. Cymbalnik
    • J. Matsumoto
    • B. H. Brinkmann
    • W. Hu
    • W. R. Marsh
    • F. Meyer
    • S. M. Stead
    • G. A. Worrell

    - NEUROLOGY - Year 2015

    OBJECTIVE: To investigate the generation, spectral characteristics, and potential clinical significance of brain activity preceding interictal epileptiform spike discharges (IEDs) recorded with intracranial EEG. METHODS: Seventeen adult patients with drug-resistant temporal lobe epilepsy were implanted with intracranial electrodes as part of their evaluation for epilepsy surgery. IEDs detected on clinical macro- and research microelectrodes...

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Year 2014
  • High frequency oscillations are associated with cognitive processing in human recognition memory
    Publication
    • M. T. Kucewicz
    • J. Cymbalnik
    • J. Matsumoto
    • B. H. Brinkmann
    • M. R. Bower
    • V. Vasoli
    • V. Sulc
    • F. Meyer
    • W. Marsh
    • S. M. Stead
    • G. A. Worrell

    - Brain: A Journal of Neurology - Year 2014

    High frequency oscillations are associated with normal brain function, but also increasingly recognized as potential biomarkers of the epileptogenic brain. Their role in human cognition has been predominantly studied in classical gamma frequencies (30-100 Hz), which reflect neuronal network coordination involved in attention, learning and memory. Invasive brain recordings in animals and humans demonstrate that physiological oscillations...

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Year 2013
  • Network oscillations modulate interictal epileptiform spike rate during human memory
    Publication
    • J. Matsumoto
    • M. Stead
    • M. T. Kucewicz
    • A. Matsumoto
    • P. Peters
    • B. Brinkmann
    • J. C. Danstrom
    • S. Goerss
    • W. Marsh
    • F. Meyer
    • G. Worrell

    - Brain: A Journal of Neurology - Year 2013

    Eleven patients being evaluated with intracranial electroencephalography for medically resistant temporal lobe epilepsy participated in a visual recognition memory task. Interictal epileptiform spikes were manually marked and their rate of occurrence compared between baseline and three 2 s periods spanning a 6 s viewing period. During successful, but not unsuccessful, encoding of the images there was a significant reduction in...

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  • Pathological and physiological high-frequency oscillations in focal human epilepsy
    Publication
    • A. Matsumoto
    • B. Brinkmann
    • S. M. Stead
    • J. Matsumoto
    • M. T. Kucewicz
    • W. R. Marsh
    • F. Meyer
    • G. Worrell

    - JOURNAL OF NEUROPHYSIOLOGY - Year 2013

    High-frequency oscillations (HFO; gamma: 40-100 Hz, ripples: 100-200 Hz, and fast ripples: 250-500 Hz) have been widely studied in health and disease. These phenomena may serve as biomarkers for epileptic brain; however, a means of differentiating between pathological and normal physiological HFO is essential. We categorized task-induced physiological HFO during periods of HFO induced by a visual or motor task by measuring frequency,...

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  • Pathological brain network activity: memory impairment in epilepsy
    Publication

    - NEUROLOGY - Year 2013

    Our thinking, memory and cognition in general, relies upon precisely timed interactions among neurons forming brain networks that support cognitive processes. The surgical evaluation of drug-resistant epilepsy using intracranial electrodes provides a unique opportunity to record directly from human brain and to investigate the coordinated activity of cognitive networks. In this issue of Neurology®, Kleen and colleagues1 implicate...

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Year 2011

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