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Articles by Yuval Nir
Auditory network persistence of stimulus representation in awake and naturally sleeping mice
Abstract Persistent neural activity often outlasts sensory stimulation, forming a bridge between perception and action. Such activity has been associated commonly with working memory, decision making, and action preparation under active task conditions. However, its existence and characteristics during passive states and sleep remain understudied.
Beyond RBD: covert REM sleep abnormalities in Parkinson’s disease - npj Parkinson's Disease
Abstract REM sleep behavior disorder (RBD), involving REM sleep without atonia (RSWA), is a prodromal marker of Parkinson’s disease (PD). We investigated whether RBD may represent the “tip of the iceberg” of pathology driving wider REM sleep disruptions. In this study, 25 early-stage, drug-naïve PD patients and 23 age-matched healthy controls underwent overnight polysomnography with high-density EEG (256 channels) to assess how sleep patterns relate to generalized motor learning (GML).
Abrupt and gradual changes in neuronal processing upon falling asleep and awakening
Abstract The neural processes that change when falling asleep are only partially understood. At the cortical level, features of both spontaneous neural activity and sensory responses change between wakefulness and sleep. For example, in early auditory cortex sleep increases the occurrence of post-onset silent (OFF) periods and elevates population synchrony. However, it remains unknown whether such changes occur abruptly or gradually around sleep onset and awakening.
Claustrum neurons projecting to the anterior cingulate restrict engagement during sleep and behavior - Nature Communications
Abstract The claustrum has been linked to attention and sleep. We hypothesized that this reflects a shared function, determining responsiveness to stimuli, which spans the axis of engagement. To test this hypothesis, we recorded claustrum population dynamics from male mice during both sleep and an attentional task (‘ENGAGE’). Heightened activity in claustrum neurons projecting to the anterior cingulate cortex (ACCp) corresponded to reduced sensory responsiveness during sleep.
A bistable inhibitory optoGPCR for multiplexed optogenetic control of neural circuits - Nature Methods
Abstract Information is transmitted between brain regions through the release of neurotransmitters from long-range projecting axons. Understanding how the activity of such long-range connections contributes to behavior requires efficient methods for reversibly manipulating their function.
Augmenting hippocampal–prefrontal neuronal synchrony during sleep enhances memory consolidation in humans - Nature Neuroscience
Abstract Memory consolidation during sleep is thought to depend on the coordinated interplay between cortical slow waves, thalamocortical sleep spindles and hippocampal ripples, but direct evidence is lacking. Here, we implemented real-time closed-loop deep brain stimulation in human prefrontal cortex during sleep and tested its effects on sleep electrophysiology and on overnight consolidation of declarative memory.
Sleep and vigilance states: Embracing spatiotemporal dynamics
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Author Correction: Reduced neural feedback signaling despite robust neuron and gamma auditory responses during human sleep - Nature Neuroscience
Nature Neurology https://doi.org/10.1038/s41593-022-01107-4, published online 11 July 2022. In the version of this article initially published, “−2” and “−4” on the y axis of Fig. 5d should have been “−20” and “−40”. The errors have been corrected in the HTML and PDF versions of the article. Author information Author notes These authors jointly supervised this work: Itzhak Fried, Yuval Nir.
Reduced neural feedback signaling despite robust neuron and gamma auditory responses during human sleep - Nature Neuroscience
Abstract During sleep, sensory stimuli rarely trigger a behavioral response or conscious perception. However, it remains unclear whether sleep inhibits specific aspects of sensory processing, such as feedforward or feedback signaling. Here, we presented auditory stimuli (for example, click-trains, words, music) during wakefulness and sleep in patients with epilepsy, while recording neuronal spiking, microwire local field potentials, intracranial electroencephalogram and polysomnography.
Boosting Recovery During Sleep by Means of Auditory Stimulation
Introduction The recovery function of sleep is essential. In case of insufficient recovery, we are tired and suffer from well-documented cognitive impairments, such as lapses in attention and reduced vigilance. Insufficient recovery during sleep can be caused by sleep disorders and other pathologies but can also be the result of curtailed sleep in healthy individuals (Van Dongen and Dinges, 2003).
Noradrenaline: Sleep on it
• None A model of human sleep homeostasis based on EEG slow-wave activity: Quantitative comparison of data and simulations. : • None Origin and significance of the cyclic alternating pattern (CAP). : • None Coordinated infraslow neural and cardiac oscillations mark fragility and offline periods in mammalian sleep. : • None Activity of norepinephrine-containing locus coeruleus neurons in behaving rats anticipates fluctuations in the sleep-waking cycle.
Frontiers | Decreased P2 Waveform Reflects Impaired Brain Executive Function Induced by 12 h of Low Homeostatic Sleep Pressure: Evidence From an Event-Related Potential Study | Neuroscience
Introduction Sleep deprivation (SD) has become a common phenomenon in modern society. Reasons for sleep loss include alcohol and coffee intake, technological development, and life stressors. These factors prevent people from getting high-quality sleep. Previous studies have found that sleep loss endangers individual physical and mental health, such as by increasing the risk of cardiovascular disease and obesity (St-Onge and Zuraikat, 2019; Yu et al., 2019).
Neurobiological and Hormonal Mechanisms Regulating Women’s Sleep
Introduction Nearly all living organisms spend a fraction of their lives in a reversible, unconscious, coma-like state, some experiencing fantastical dreams reminiscent of schizophrenic symptoms. It is still unclear why exactly organisms sleep, but the necessity of sleep for health and well-being is certainly clear.
Selective neuronal lapses precede human cognitive lapses following sleep deprivation
Sleep deprivation is a major source of morbidity with widespread health effects, including increased risk of hypertension, diabetes, obesity, heart attack, and stroke1. Moreover, sleep deprivation brings about vehicle accidents and medical errors2,3,4 and is therefore an urgent topic of investigation.
Falling Walls: The Past, Present and Future of Artificial Intelligence
Editor’s Note: The Falling Walls Conference is an annual, global gathering of forward thinking individuals from 80 countries organized by the Falling Walls Foundation. Each year, on November 9—the anniversary of the fall of the Berlin Wall—20 of the world’s leading scientists are invited to Berlin to present their current breakthrough research. The aim of the conference is to address two questions: Which will be the next walls to fall? And how will that change our lives?
Falling Walls: Untangling the Mystery of Sleep
Editor’s Note: The Falling Walls Conference is an annual, global gathering of forward thinking individuals from 80 countries organized by the Falling Walls Foundation. Each year, on November 9—the anniversary of the fall of the Berlin Wall—20 of the world’s leading scientists are invited to Berlin to present their current breakthrough research. The aim of the conference is to address two questions: Which will be the next walls to fall? And how will that change our lives?
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