Publications by authors named "DEMERS M"

Article Synopsis
  • The study examines how a certain type of microbe, when exposed to periods of darkness, can develop tolerance through co-cultivation with a heterotrophic microbe.
  • Results show that the dark-tolerant microbes became larger, had less chlorophyll, and shifted from photosynthesis to respiration, while the heterotroph adapted by using more organic acids instead of sugars.
  • The research highlights the enhanced metabolic exchange between the two microbes, indicating a strong coupling that helps them survive in low-light conditions.
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Background And Objectives: Stroke in young adults has a lifelong impact on activities of daily life, including driving, leisure, and community-based activities; social participation; and reduced productivity. The needs of young people with stroke (YPwS) are likely to vary across different countries, and the development of age-adapted information and interventions is therefore critical in addressing those needs. This study aims to (1) identify the unmet needs of people with stroke aged 18 to 55 years across countries with varied income levels and cultural backgrounds and (2) determine their preferred means to access knowledge and information about stroke in the young.

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Article Synopsis
  • High rates of psychiatric comorbidities, including psychotic disorders, are observed in individuals with problem gambling (PBG), impacting their treatment and recovery.* -
  • A systematic review of 22 studies found the overall prevalence of psychotic disorders among PBG individuals to be 4.9%, with variations based on whether they were in treatment or surveyed.* -
  • The review emphasizes the importance of screening for psychotic disorders and other mental health conditions in problem gamblers to better address their recovery needs.*
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The remarkable pace of genomic data generation is rapidly transforming our understanding of life at the micron scale. Yet this data stream also creates challenges for team science. A single microbe can have multiple versions of genome architecture, functional gene annotations, and gene identifiers; additionally, the lack of mechanisms for collating and preserving advances in this knowledge raises barriers to community coalescence around shared datasets.

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The priorities of individuals with chronic stroke are not always reflected in clinical practice. This study provides insight into meaningful factors related to long-term motor recovery in stroke survivors. Thirty individuals with chronic stroke participated in semi-structured interviews about movement, recovery, and barriers to and facilitators of mobility and paretic arm use.

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Introduction: Efforts toward reducing stroke burden have been an immense challenge. One important reasons could be the scope and quality of clinical practice guidelines (CPGs) developed for stroke rehabilitation in low- and middle-income countries (LMICs), restricting its translation to clinical practice. This systematic review aimed to assess the availability, scope and quality of CPGs for stroke rehabilitation in LMICs.

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Due to its reliance on heterogeneous symptomatology, the accurate diagnosis of psychotic disorders remains a challenging task in clinical practice. Precise and early diagnosis of psychotic disorders facilitates early intervention, which has been shown to have substantial benefits for long-term outcomes. Still, the lack of specific biomarkers is an important limitation in early diagnosis and intervention.

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Purpose: To conduct a systematic review on the impacts of using mechanical assistive devices on function, performance in activities and participation of persons with upper extremity impairments, and to synthesize the strengths and limitations of these devices.

Method: Three independent reviewers conducted systematic searches of articles published between 2003 and 2023 in Compendex, Inspec, Embase, PubMed/Medline, IEEE Xplore, and Web of Science, as well as manual searches on the RESNA website for conference papers over the same period. The methodological quality of articles was appraised using the tool.

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Protein production in the biopharmaceutical industry necessitates the utilization of multiple analytical techniques and control methodologies to ensure both safety and consistency. To facilitate real-time monitoring and control of cell culture processes, Raman spectroscopy has emerged as a versatile analytical technology. This technique, categorized as a Process Analytical Technology, employs chemometric models to establish correlations between Raman signals and key variables of interest.

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Introduction: Problem gambling (PBG) is more common in people with mental health disorders, including substance use, bipolar, and personality disorders, than in the general population. Although individuals with psychotic disorders might be expected to be more vulnerable to PBG, fewer studies have focused on this comorbidity. The aim of this review was to estimate the prevalence of PBG in people with psychotic disorders.

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Article Synopsis
  • SARS-CoV-2, which emerged in late 2019, has caused a global pandemic, with 34 vaccines approved and about 67% of the world vaccinated, yet new infections and variants still pose challenges.
  • Researchers evaluated a new measles virus-vectored vaccine (V591) designed to target the SARS-CoV-2 spike protein in an African green monkey model, demonstrating strong immune responses pre-challenge.
  • V591-vaccinated monkeys showed reduced viral loads and earlier cessation of virus shedding after exposure to SARS-CoV-2, leading to a lower disease burden in their lungs compared to those given a control vaccine.
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Rift Valley fever virus (RVFV) is an emerging arboviral disease with pandemic potential. While infection is often self-limiting, a subset of individuals may develop late-onset encephalitis, accounting for up to 20 % of severe cases. Importantly, individuals displaying neurologic disease have up to a 53 % case fatality rate, yet the neuropathogenesis of RVFV infection remains understudied.

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Objective: To establish the concurrent validity, acceptability, and sensor optimization of a consumer-grade, wearable, multi-sensor system to capture quantity and quality metrics of mobility and upper limb movements in stroke survivors.

Design: Single-session, cross-sectional.

Setting: Clinical research laboratory.

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Article Synopsis
  • Preventing relapse in schizophrenia is essential for better long-term health, as recurrent psychotic episodes hinder recovery and overall wellbeing.
  • Current clinical methods to predict relapses are not precise enough, emphasizing the need for alternative strategies.
  • Recent progress in Natural Language Processing (NLP) shows promise in using speech patterns to forecast relapses 2-4 weeks in advance by identifying linguistic markers associated with thought disorders.
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Background: The optimal duration of antipsychotic treatment following remission of first-episode psychosis (FEP) is uncertain, considering potential adverse effects and individual variability in relapse rates. This study aimed to investigate the effect of antipsychotic discontinuation compared to continuation on recovery in remitted FEP patients.

Methods: CENTRAL, MEDLINE (Ovid), Embase, and PsycINFO databases were searched on November 2, 2023, with no language restrictions.

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Objective: The objectives of this study were to establish the short-term feasibility and usability of wrist-worn wearable sensors for capturing the arm and hand activity of people with stroke and to explore the association between factors related to the use of the paretic arm and hand.

Methods: Thirty people with chronic stroke were monitored with wrist-worn wearable sensors for 12 hours per day for a 7-day period. Participants also completed standardized assessments to capture stroke severity, arm motor impairments, self-perceived arm use, and self-efficacy.

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Aims: The objective of this study is to underline the impact of Gaming Disorder on the clinical evolution of patients with First Episode Psychosis. The specific aims of the study are to determine the prevalence of gaming disorder among those patients and assess the consequences of gaming on their clinical trajectory.

Methods: This is a prospective multicenter cohort study that will enrol 800 patients diagnosed with a first episode psychosis, with a follow-up period of up to 3 years.

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Background: Although attention-deficit hyperactivity disorder (ADHD) is often comorbid with schizophrenia spectrum and other psychotic disorders (SZSPD), concerns about an increased risk of psychotic events have limited its treatment with either psychostimulants or atomoxetine.

Aims: To examine whether the risk of hospital admission for psychosis in people with SZSPD was increased during the year following the introduction of such medications compared with the year before.

Method: This was a retrospective cohort study using Quebec (Canada) administrative health registries, including all Quebec residents with a public prescription drug insurance plan and a diagnosis of psychotic disorder, defined by relevant ICD-9 or ICD-10 codes, who initiated either methylphenidate, amphetamines or atomoxetine, between January 2010 and December 2016, in combination with antipsychotic medication.

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Article Synopsis
  • Wearable technology in stroke rehabilitation can provide valuable feedback on motor performance, and understanding stroke survivors' preferences may help make this feedback more effective.
  • A study with 30 chronic stroke survivors monitored their movement for a week, providing them with visual reports on their arm/hand use and mobility.
  • Results showed that participants found the feedback easy to understand and actionable, with hourly bar plots for arm use and steps being the most preferred metrics, while three key themes emerged: motivation for change, real-time feedback tailored to goals, and the importance of guidance from experienced clinicians.
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The brainstem houses neuronal circuits that control homeostasis of vital functions. These include the depth and rate of breathing and, critically, apnea, a transient cessation of breathing that prevents noxious vapors from entering further into the respiratory tract. Current thinking is that this reflex is mediated by two sensory pathways.

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The regulation of exercise intensity allows an athlete to perform an exercise in the fastest possible time while avoiding debilitating neuromuscular fatigue development. This phenomenon is less studied during intermittent activities. To investigate anticipatory and real-time regulation of motor output and neuromuscular fatigue during repeated-sprint exercise, twelve males randomly performed one (S1), two (S2), four (S4) and six (S6) sets of five 5-s cycling sprints.

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Animals interact with their environment through mechanically active, mobile sensors. The efficient use of these sensory organs implies the ability to track their position; otherwise, perceptual stability or prehension would be profoundly impeded. The nervous system may keep track of the position of a sensorimotor organ via two complementary feedback mechanisms-peripheral reafference (external, sensory feedback) and efference copy (internal feedback).

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