Samuel David
New research by Samuel David at McGill University provides new insight on the role of macrophages and resident microglia following injury to the central nervous system.
Infiltrating monocyte-derived macrophages (MDMs) and resident microglia dominate at sites of central nervous system (CNS) injury. These cells have different origins – MDMs arise from the bone marrow throughout life, while microglia arise from the yolk sac during embryonic development and populate the CNS.
Doug Munoz
New research by Chin-An Wang and Douglas Munoz, at Queen’s University, shows that a brain region called the intermediate superior colliculus (SCi) helps regulate the size of the pupil to optimize visual sensitivity and sharpness. Interestingly, brain processing of an object begins even before one shifts their gaze towards the object. This research shows that the size of the pupil is adjusted to the light level of the target, independent of the general light level, before the movement of the eyes towards this target.
Congratulations to the new fellows of the Canadian Academy of Health Sciences. Induction into the CAHS as a Fellow is considered one of the highest honours within Canada’s academic community.
The newly inducted fellows include the following neuroscientists:
Ingrid Johnsrude
Neuroscientists from Western University have discovered a difference in the way younger and older adults respond to sounds. In the BrainsCAN study, researchers found that the brain becomes more sensitive to sounds as a person ages, which likely causes hearing challenges over a lifetime.
Alex Rauscher
Researchers say the findings provide a convincing reason to keep concussed athletes on the bench even if they no longer exhibit any symptoms.
Detailed scans of concussed University of British Columbia hockey players found that the protective fatty tissue surrounding brain cell fibres was loosened two weeks after the injury—even though the athletes felt fine and were deemed ready to return to the ice.
Dr. Alain Dagher
When it comes to weight gain, the problem may be mostly in our heads, and our genes
Clinicians should consider how the way we think can make us vulnerable to obesity, and how obesity is genetically intertwined with brain structure and mental performance, according to new research.
The study, led by researchers at the Montreal Neurological Institute and Hospital (The Neuro) and published in the Proceedings of the National Academy of Sciences on Aug. 28, 2018, was an examination of magnetic resonance imaging (MRI) and cognitive test data from 1,200 individuals, supplied as part of the Human Connectome Project.
The Royal Society of Canada has recently announced new Fellows in the Academies of Arts and Humanities, Social Sciences, and Science. They have been elected by their peers for their outstanding scholarly, scientific and artistic achievement. Recognition by the RSC is the highest honour an individual can achieve in the Arts, Social Sciences and Sciences.
The RSC also welcomed new Members of the College of New Scholars, Artists and Scientists, that include top mid-career leaders in Canada. The College provides the RSC with a multigenerational capacity to help Canada and the world address major challenges and seize new opportunities including those identified in emerging fields.
Matthew Farrer
For the past decade, Parkinson’s disease researchers have relied on the experimental equivalent of using a sledgehammer to tune a guitar to test new therapies for the disease. This may be a reason clinical trials of promising neuroprotective drugs fail. But, in new research published today in Nature Parkinson’s Disease, researchers at the Djavad Mowafaghian Centre for Brain Health (DMCBH) may have found the ideal tool for the job.
“We believe we’ve found an approach that is most relevant to humans, in that our models of gene dysfunction mimic the etiology of Parkinson’s disease rather than its pathology— meaning its beginning rather than its end,” says Dr. Matthew Farrer, the study’s lead investigator and a researcher at the Centre for Applied Neurogenetics at DMCBH. “This means we’re looking at the disease before it becomes symptomatic, before it begins affecting an individual’s motor skills or cognition.”
Individual members of the Canadian Association for Neuroscience (CAN) have alerted us to the fact that a number of scientists across Canada are being denied visas to enter the United States to attend the next annual Society for Neuroscience meeting in San Diego. Many are students and postdoctoral fellows who have left their home countries to dedicate their energy and talents to research into devastating brain and mental health conditions that afflict millions worldwide. CAN takes the position that the exchange of ideas cannot be limited by political boundaries. To do so severely compromises the ability of the scientific enterprise to develop new ideas and advance humanity. Scientists must have the ability to travel freely to discuss their work and interact with colleagues across the globe.
Read about a multidisciplinary collaboration between neuroscientists and artists, developed through The Convergence Initiative. Founded in 2016 by neuroscientist and graphic designer Dr. Cristian Zaelzer, the Convergence – Perceptions of Neuroscience initiative is a partnership with the Brain Repair and Integrative Neuroscience Program (BRaIN) of the Research Institute of the McGill University Health Centre (RI-MUHC), the Faculty of Fine Arts of Concordia University (FoFA), and the Canadian Association for Neuroscience (CAN/ACN). This partnership has been continuously supported by the RI-MUHC, the Montreal General Hospital Foundation, McGill University Integrative Program in Neurosciences (IPN), and the Visual Voice Gallery.
Dr. Keith Murai, BRaIN program director, thinks the science vs. humanities dichotomy is a false one.
Read our submission to the Standing Committee on Finance of Canada in advance of budget 2019:
Huai-Ying Huang
Congratulations to 17 year-old Huai-Ying Huang of Sir Frederick Banting Secondary School in London, Ontario, Canada, on winning third place in the 2018 International Brain Bee Championship in Berlin, held July 7-11, 2018! .
Huai-Ying Huang loves playing the piano and oboe, and is starting at McGill University to pursue her dream of becoming a neurologist or a neurosurgeon, not only because she has passion for neuroscience, but because she wants to be able to help people affected by neurological disorders.
Jessica Agostinone and Adriana Di Polo
Major discovery at the CRCHUM: reestablishing communication between neurons to improve vision.
Neuroscience researcher Dr. Adriana Di Polo, Ph. D., and her team at the University of Montreal Hospital Research Centre (CRCHUM) in Canada, have made a major breakthrough in the treatment of glaucoma. Their findings could also be applicable to other neurodegenerative conditions, notably Alzheimer’s disease. The results have just been published in the prestigious British scientific journal Brain, an Oxford University Press publication.
Paul Frankland
TORONTO – When asked to think of their earliest memory, most would think of a time when they were four or five years old. The period from birth to kindergarten appears to be forgotten. Since the late 1800s, this phenomenon has been called “infantile amnesia” and debate on why we can’t remember our earliest years has persisted to this day: Are these memories gone or are they just difficult to access?
A new study from The Hospital for Sick Children (SickKids) shows these early memories in mice are not missing and can be brought back by directly stimulating different clusters of neurons that represent individual infantile memories in the brain. The results, published in Current Biology, provide deeper insight into the complexities of forgetting.
Maurice Chacron
Researchers at McGill University have discovered that feedback pathways enable sensory neurons to respond to weak sensory input in order to lead to perception.
Published in PLoS Biology, their study shows that feedback pathways, which are seen ubiquitously across sensory systems and account for 90-95% of input onto sensory neurons, are necessary to generate neural responses and perception of weak sensory input that would otherwise not be detected by the organism. These results thus reveal an elegant mechanism by which the brain processes sensory information, which is critical for understanding brain function at large.
Researchers at Université de Montréal look at the promising role played by the BMI1 gene, which could someday help mitigate or even reverse the disease.
After a decade of work, a team led by Hôpital Maisonneuve-Rosemont researcher and Université de Montréal associate professor Dr. Gilbert Bernier has shed promising light on the origin of the most common and prevalent form of Alzheimer’s disease, hoping to someday help mitigate or even reverse the progress of the disease. The team’s results are published in the prestigious scientific journal Cell Reports.
Psychiatric disorders share an underlying genetic basis, says landmark paper with authors from University of Toronto, University of Calgary, Université de Montréal, McGill University, Dalhousie University and other Canadian Institutions.
Charles Bourque
Researchers uncover mechanisms of overhydration leading to hyponatremia – a common condition in patients after a traumatic brain injury
Discovery of a pathway linking Alzheimer’s disease and Type 2 Diabetes leads to new strategies to preserve brain health.
Fernanda De Felice at Queen’s University has discovered a disease mechanism common to Alzheimer’s disease and Type 2 Diabetes. This mechanism, which consist of a pathway leading to inflammation in different parts of the brain, leads to glucose intolerance, memory impairments and degeneration of the connections between neurons, called synapses. This discovery can lead the way to new therapies to preserve brain health. These results were presented at the 2018 Canadian Neuroscience Meeting, in Vancouver, May 16th, 2018.
Researchers at UBC show that two types of cells, astrocytes and pericytes, cooperate to regenerate cerebral blood vessels to restore blood flow in brain regions damaged by stroke.
Stroke is one of three leading causes of death in Canada and leads to permanent disability in about half of survivors. During an ischemic stroke, there is a blockage of blood flow which results in cell death in a specific area or the brain. Dr. Brian MacVicar and Dr. Louis-Philippe Bernier at the University of British Columbia has recently discovered how two types of cells, called astrocytes and pericytes, work together to regenerate blood flow in the areas affected by these strokes (called ischemic areas). These results were presented at the 2018 Canadian Neuroscience Meeting, in Vancouver, May 16th, 2018.
Understanding how the brain is built during development leads to new therapeutic approaches for repairing brain injury.
Research by Dr. Freda Miller and her team at the Hospital for Sick Children and the University of Toronto has determined how brain stem cells and the environment they live within collaborate to build brain circuits during development, discoveries that have led to a better understanding of neurodevelopmental disorders in children. The Miller lab and her basic research collaborators work closely with their clinical colleagues to harness this information and develop new approaches for treating brain injury. These results were presented at the 2018 Canadian Neuroscience Meeting, in Vancouver, May 15th, 2018.
Rats eating a “cafeteria-diet” show changes in the brain regions that integrate information about food and determines eating behaviour.
Research by Stephanie Borgland at the University of Calgary shows that giving rats unrestricted access to unhealthy foods for extended periods not only leads to obesity, but also to brain changes that makes food more attractive to them, even when their hunger should be satisfied. Specifically, Dr. Borgland’s research identified modifications in endocannabinoid signalling in a brain region called the orbitofrontal cortex (OFC) of these obese rats. These unpublished results were presented at the 2018 Canadian Neuroscience Meeting, in Vancouver, May 15th, 2018.
Cellular and molecular modifications in the brain of child abuse victims could explain their increased vulnerability to stress-related psychiatric disorders, including depression and suicide
Psychiatrists have long known that child abuse increases a person’s lifetime risk of psychiatric illness, including depression and suicide. New research by Naguib Mechawar and Gustavo Turecki from the McGill Group for Suicide Studies offers some explanation of the process through which abuse lastingly modifies brain wiring. Their research, which compare the brains of depressed suicides with or without a history of severe child abuse, and of healthy controls, identified important modifications in the Anterior Cingulate Cortex (ACC), a brain region critical for the regulation of moods and emotions. These findings were presented at the 2018 Canadian Neuroscience Meeting, in Vancouver, May 14th, 2018.
Catharine Winstanley at the University of British Columbia presents discoveries revealing the brain mechanisms involved in decision-making
A team of researchers led by Dr. Catharine Winstanley at the University of British Columbia have uncovered a network of regions in the brain that are involved in determining the choice of working harder to get a bigger reward, or putting in a lesser effort and receiving a smaller reward. Understanding how the brain makes such decisions is one of the most fundamental questions in neuroscience and psychology, and sophisticated animal behavioural testing, coupled with advance brain imaging and stimulation techniques are shedding light on this important process. These results were presented at the 2018 Canadian Neuroscience Meeting, in Vancouver, May 14th, 2018.
The meeting will gather neuroscientists from Canada and around the world to share their research on the brain and nervous system. All areas of neuroscience research will be presented
