2,440 results match your criteria: "INSERM U1028; University Lyon 1 Lyon[Affiliation]"

Perspectives on obesity imaging: [F]2FNQ1P a specific 5-HT brain PET radiotracer.

Int J Obes (Lond)

January 2025

Lyon Neuroscience Research Center (CRNL), CNRS UMR5292, INSERM U1028, Université Lyon 1, Lyon, France.

Article Synopsis
  • The study investigates how diet-induced obesity (DIO) affects serotonin subtype 6 receptors (5-HT) in the brains of Wistar rats, which are known to play a key role in appetite control and weight loss.
  • Using MRI and PET scanning techniques, researchers monitored changes in 5-HT receptor density before and after a 10-week high-fat diet.
  • Results showed that DIO led to increased body fat and higher binding of the 5-HT radiotracer in several brain regions, highlighting the potential of [F]2FNQ1P PET to study obesity-related changes in the brain.*
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Children's social preferences are influenced by the relative status of other individuals, but also by their social identity and the degree to which those individuals are like them. Previous studies have investigated these aspects separately and showed that in some circumstances children prefer high-status individuals and own-gender individuals. Gender is a particularly interesting case to study because it is a strong dimension of social identity, but also one of the most prevalent forms of social hierarchy, with males conceptualised as superior to females, by adults and children alike.

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Background: Deficits in mentalizing and attachment occur in the autism and schizophrenia spectrum, and their extended traits in the general population. Parental attachment and the broader social environment highly influence the development of mentalizing. Given the similarities in the symptomatology and neurodevelopmental correlates of autism spectrum disorder (ASD) and schizophrenia (SCH), it is crucial to identify their overlaps and differences to support screening, differential diagnosis, and intervention.

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Many recent studies indicate that control of decisions and actions is integrated during interactive behavior. Among these, several carried out in humans and monkeys conclude that there is a coregulation of choices and movements. Another perspective, based on human data only, proposes a decoupled control of decision duration and movement speed, allowing, for instance, trading decision duration for movement duration when time pressure increases.

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Article Synopsis
  • Impulsivity and preference for immediate rewards are linked to various psychiatric and neurodegenerative disorders, but their underlying neurobiology is not fully understood.
  • The study aimed to identify a structural MRI pattern related to impulsivity in healthy adults and validate it in patients with behavioral variant frontotemporal dementia (bvFTD).
  • The findings revealed a "Structural Impulsivity Signature" (SIS) that correlates with impulsivity traits and can distinguish bvFTD patients from controls, suggesting a potential diagnostic tool for future research.
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Imaging of impulse control disorders in Parkinson's disease.

Rev Neurol (Paris)

December 2024

Hospices Civils de Lyon, Pierre-Wertheimer Neurological Hospital, Department of Neurology C, Expert Parkinson Center NS-PARK/FCRIN, Bron, France; CRNL Centre de Recherche en Neurosciences de Lyon, PATHPARK, INSERM U1028 CNRS UMR 5292, Bron, France; Université Lyon, Université Claude-Bernard Lyon 1, Faculté de Médecine et de Maïeutique Lyon Sud Charles-Mérieux, Oullins, France.

Impulse control disorders (ICD) are frequent and cumbersome behavioral disorders in patients with Parkinson's disease (PD). Understanding their pathophysiological underpinnings is crucial. Molecular imaging using positron emission tomography (PET) and single-photon emission computed tomography (SPECT) clearly indicates preexisting vulnerability and abnormal sensitization of the pre- and postsynaptic dopaminergic system.

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Percutaneous and open anterolateral cordotomy for intractable cancer pain: a technical note.

Neurochirurgie

November 2024

Department of Neurosurgery, University Hospital of Saint-Etienne, France; NEUROPAIN Lab, INSERM U1028, University Jean Monnet, Saint-Etienne, France.

Article Synopsis
  • Anterolateral cordotomy (AL-C) is a procedure used to relieve severe cancer pain, but its usage has declined, risking the loss of expertise among neurosurgeons.
  • The study reviews patient selection, outcomes, and current techniques for both percutaneous and open AL-C, supported by case examples and visuals.
  • AL-C effectively reduces pain and decreases reliance on pain medications, although it may sometimes fail to provide long-lasting relief or can lead to mirror pain.
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Eyes and hand are both reliable at localizing somatosensory targets.

Exp Brain Res

November 2024

Integrative Multisensory Perception Action and Cognition Team of the Lyon Neuroscience Research Center, INSERM U1028 CNRS U5292 University Lyon 1, 16 avenue du Doyen Lépine, Lyon, 69500, France.

Body representations (BR) for action are critical to perform accurate movements. Yet, behavioral measures suggest that BR are distorted even in healthy people. However, the upper limb has mostly been used as a probe so far, making difficult to decide whether BR are truly distorted or whether this depends on the effector used as a readout.

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REM sleep remains paradoxical: sub-states determined by thalamo-cortical and cortico-cortical functional connectivity.

J Physiol

October 2024

Central Integration of Pain (NeuroPain) Lab - Lyon Neuroscience Research Center, INSERM U1028; CNRS, UMR5292, Université Claude Bernard, Bron, France.

During paradoxical sleep (PS, aka REM sleep) the cerebral cortex displays rapid electroencephalographic activity similar to that of wakefulness, whereas in the posterior associative thalamus, rapid activity is interrupted by frequent periods of slow-wave (delta) oscillations at 2-3 Hz, thereby dissociating the intrinsic frequency in thalamus and cortex. Here we studied the functional consequences of such a dissociation using intrathalamic and intracortical recordings in 21 epileptic patients, applying coherence analysis to examine changes in functional connectivity between the posterior thalamus (mainly medial pulvinar) and six cortical functional networks, and also between each cortical network with respect to the others. Periods of slow-wave thalamic activity ('delta PS') were more prevalent than phases of 'rapid PS,' and the delta/rapid thalamic alternance did not overlap with the classical tonic/phasic dichotomy based on rapid eye movements.

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Exploring the Embodied Mind: Functional Connectome Fingerprinting of Meditation Expertise.

Biol Psychiatry Glob Open Sci

November 2024

EDUWELL team, Lyon Neuroscience Research Centre, INSERM U1028, CNRS UMR 5292, Lyon 1 University, Lyon, France.

Article Synopsis
  • Short mindfulness-based interventions can improve well-being and may lead to lasting changes, but research on their brain effects is limited.
  • The study compared brain connectivity in experienced Buddhist meditators to novices, finding distinct neural patterns linked to meditation expertise during both meditation and resting states.
  • Results showed that experts have better integration of brain networks, helping them maintain emotional distance and demonstrating the cognitive benefits of prolonged meditation practice.
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A pontine-medullary loop crucial for REM sleep and its deficit in Parkinson's disease.

Cell

October 2024

International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan. Electronic address:

Identifying the properties of the rapid eye movement (REM) sleep circuitry and its relation to diseases has been challenging due to the neuronal heterogeneity of the brainstem. Here, we show in mice that neurons in the pontine sublaterodorsal tegmentum (SubLDT) that express corticotropin-releasing hormone-binding protein (Crhbp neurons) and project to the medulla promote REM sleep. Within the medullary area receiving projections from Crhbp neurons, neurons expressing nitric oxide synthase 1 (Nos1 neurons) project to the SubLDT and promote REM sleep, suggesting a positively interacting loop between the pons and the medulla operating as a core REM sleep circuit.

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Germline mutations in a G protein identify signaling cross-talk in T cells.

Science

September 2024

Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research (DIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA.

Article Synopsis
  • Researchers studied mutations in a gene that affects a key protein involved in cell signaling, which is linked to severe health issues like impaired immunity in patients.
  • The mutations were found to disrupt normal cell behavior by promoting excessive cell growth and responses to immune signals, specifically T cell receptor stimulation.
  • The mutant protein was shown to interfere with a regulatory protein, leading to heightened activity of important signaling pathways that contribute to cell growth and survival.
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Identifying Transfer Learning in the Reshaping of Inductive Biases.

Open Mind (Camb)

September 2024

Department of Computational Sciences, HUN-REN Wigner Research Centre for Physics, Konkoly-Thege Miklós út 29-33., H-1121, Budapest, Hungary.

Transfer learning, the reuse of newly acquired knowledge under novel circumstances, is a critical hallmark of human intelligence that has frequently been pitted against the capacities of artificial learning agents. Yet, the computations relevant to transfer learning have been little investigated in humans. The benefit of efficient inductive biases (meta-level constraints that shape learning, often referred as priors in the Bayesian learning approach), has been both theoretically and experimentally established.

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Article Synopsis
  • The study evaluates changes in burnout, job strain, isostrain, sleepiness, and fatigue among healthcare workers in French emergency departments over a 90-day period.
  • A total of 211 healthcare workers participated, with about 40% showing symptoms of burnout and job strain initially; factors such as psychiatric history and having dependents were linked to these symptoms.
  • The findings highlight the need for targeted improvement strategies to address mental health issues among emergency department staff, particularly for those in administrative and managerial roles.
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  • The study compares attentional performance in children with hypersomnolence (HYP), ADHD, and a control group using behavioral tests and EEG measures.
  • Children with HYP demonstrated slower reaction times and less stability in attention compared to controls, but their EEG results were similar to those of children with ADHD.
  • The findings suggest a link between sleepiness and attentional challenges in HYP, indicating that the BLAST-EEG method could aid in assessing attention issues related to excessive sleepiness.
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A new nonsense pathogenic variant in exon 1 of PHOX2B leads to the diagnosis of congenital central hypoventilation syndrome with intra-familial variability.

Arch Pediatr

October 2024

Service de pneumologie, allergologie, mucoviscidose, Hôpital Femme Mère Enfant, Hospices Civils de Lyon, 69500 Bron, France; Service d'Épileptologie Clinique, des Troubles du Sommeil et de Neurologie Fonctionnelle de l'Enfant, Hôpital Femme Mère Enfant, Hospices Civils de Lyon, 69500 Bron, France; Unité INSERM U1028 CNRS UMR 5292, Université Lyon 1, Lyon, France. Electronic address:

Congenital central hypoventilation syndrome (CCHS) is a rare genetic disorder of the autonomic nervous system resulting in decreased brain sensitivity to hypercapnia and hypoxia characterized by a genetic abnormality in the pair-like homeobox 2B (PHOX2B) gene. Most patients have a heterozygous expansion of the polyalanine repeat in exon 3 (PARM), while 10 % of patients have non-PARM (NPARM) mutations that can span the entire gene. The majority of pathogenic variants are de novo, but variants with incomplete penetrance can be identified in the heterozygous state.

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Intrafamilial associations of sleep multitrajectory groups between ages of 3 and 60 months in the SEPAGES cohort.

Sleep Health

December 2024

Université Paris Cité and Université Sorbonne Paris Nord, Inserm, INRAE, Center for Research in Epidemiology and StatisticS (CRESS), Paris, France; Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, WAKING, Bron, France. Electronic address:

Objectives: We investigated intrafamilial sleep evolution by identifying children's sleep multitrajectory groups between 3- and 60-month of age and their association with parental sleep multitrajectory groups.

Methods: We included 180 children from the SEPAGES cohort (Grenoble, France) whose parents belonged to previously identified sleep multitrajectory groups, through group-based multitrajectory modeling, between 3 and 36months postpartum, using nighttime (NSD) and weekend daytime (DSD) sleep durations and subjective sleep loss, comprising "No," "Subjective," and "Global" sleep problems groups. Child sleep information (NSD, DSD, subjective sleep loss, night waking, and sleep onset difficulties) was collected by parental questionnaires at 3-, 12-, 36-, and 60-month.

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Adaptation of reactive saccades (RS), made toward the sudden appearance of stimuli in our environment, is a plastic mechanism thought to occur at the motor level of saccade generation. As saccadic oculomotor commands integrate multisensory information in the parietal cortex and superior colliculus, adaptation of RS should occur not only toward visual but also tactile targets. In addition, saccadic adaptation in one modality (vision or touch) should transfer cross-modally.

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The present study examined dream habits, and their relation to sleep patterns, in 1151 preteens (597 boys; 554 girls; 11.31 ± 0.62 years old).

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Ever since 2018 France has been the only country to approve the gamma aminobutyric acid type B (GABA-B) receptor agonist baclofen for alcohol dependence. This authorization follows a ten-year period of intensive off-label use during which baclofen was used in doses of up to 300 and even 400mg per day to support the gradual reduction of alcohol consumption in patients suffering from alcohol dependence. However, in international clinical trials, baclofen has mainly been studied to support the maintenance of abstinence.

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Assess the changes in post-traumatic stress disorder (PTSD), burnout, anxiety, depression, jobstrain, and isostrain levels over time among healthcare workers in emergency departments (EDs) after successive outbreaks of COVID-19. A prospective, multicenter study was conducted in 3 EDs and an emergency medical service. Healthcare workers who participated in our previous study were invited to participate in a follow-up 16 and 18 months and completed the questionnaires to assess symptoms of PTSD, burnout, anxiety, depression, jobstrain, and isostrain.

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Defining key concepts for mental state attribution.

Commun Psychol

April 2024

Humboldt University of Berlin, Berlin School of Mind and Brain, Department of Psychology, Berlin, Germany.

The terminology used in discussions on mental state attribution is extensive and lacks consistency. In the current paper, experts from various disciplines collaborate to introduce a shared set of concepts and make recommendations regarding future use.

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Our aim in this study was to understand how we perform visuospatial comparison tasks by analyzing ocular behavior and to examine how restrictions in macular or peripheral vision disturb ocular behavior and task performance. Two groups of 18 healthy participants with normal or corrected visual acuity performed visuospatial comparison tasks (computerized version of the elementary visuospatial perception [EVSP] test) (Pisella et al., 2013) with a gaze-contingent mask simulating either tubular vision (first group) or macular scotoma (second group).

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The role of SEEG in the presurgical decision-making process in MRI-normal mesial temporal lobe epilepsy.

Rev Neurol (Paris)

December 2024

Department of Functional Neurology and Epileptology, Hospices Civils de Lyon and Lyon 1 University, Lyon, France; Lyon Neuroscience Research Center, Inserm U1028, CNRS UMR5292, Lyon 1 University, Lyon, France.

Article Synopsis
  • In patients with mesial temporal lobe epilepsy (mTLE) who have normal MRI results, there is debate about whether to perform anterior temporal lobectomy while sparing the hippocampus due to potential memory loss risks.
  • A study examined 17 patients with normal MRIs and EEG data that indicated unilateral seizure activity, categorizing them into two groups based on the timing of hippocampal involvement during seizures.
  • The results showed no significant difference in post-operative seizure and neuropsychological outcomes regardless of whether the hippocampus was removed during surgery, suggesting that SEEG should be part of the surgical planning for these patients.
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Multisensory integration and motor resonance in the primary motor cortex.

Cortex

October 2024

Department of Psychology & NeuroMI - Milan Center for Neuroscience, University of Milano-Bicocca, Milan, Italy; IRCCS Istituto Auxologico Italiano, Laboratory of Neuropsychology, Milan, Italy. Electronic address:

Humans are endowed with a motor system that resonates to speech sounds, but whether concurrent visual information from lip movements can improve speech perception at a motor level through multisensory integration mechanisms remains unknown. Therefore, the aim of the study was to explore behavioral and neurophysiological correlates of multisensory influences on motor resonance in speech perception. Motor-evoked potentials (MEPs), by single pulse transcranial magnetic stimulation (TMS) applied over the left lip muscle (orbicularis oris) representation in the primary motor cortex, were recorded in healthy participants during the presentation of syllables in unimodal (visual or auditory) or multisensory (audio-visual) congruent or incongruent conditions.

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