Alexander McGirr

ORCID: 0000-0002-8425-3958
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About
Contact & Profiles
Research Areas
  • Transcranial Magnetic Stimulation Studies
  • Treatment of Major Depression
  • Suicide and Self-Harm Studies
  • Bipolar Disorder and Treatment
  • Functional Brain Connectivity Studies
  • Electroconvulsive Therapy Studies
  • Tryptophan and brain disorders
  • Neuroscience and Neuropharmacology Research
  • Child and Adolescent Psychosocial and Emotional Development
  • Psychosomatic Disorders and Their Treatments
  • Schizophrenia research and treatment
  • Dementia and Cognitive Impairment Research
  • Neurological disorders and treatments
  • Stress Responses and Cortisol
  • Mental Health Research Topics
  • Maternal Mental Health During Pregnancy and Postpartum
  • Neural dynamics and brain function
  • Neural and Behavioral Psychology Studies
  • Cerebrospinal fluid and hydrocephalus
  • Obsessive-Compulsive Spectrum Disorders
  • Mental Health Treatment and Access
  • Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Pain Management and Treatment
  • Advanced MRI Techniques and Applications
  • Homicide, Infanticide, and Child Abuse

University of Calgary
2018-2025

Centre for Addiction and Mental Health
2021-2025

Centre for Mental Health
2025

University of Tübingen
2024

Hertie Institute for Clinical Brain Research
2024

Harvard University
2024

McLean Hospital
2024

Ontario Brain Institute
2020-2022

University of British Columbia
2012-2017

McGill University
2006-2016

It is unclear whether the association between impulsive-aggressive behaviours and suicide exists across different ages.Via psychological autopsy, we examined a total of 645 subjects aged 11-87 years who died by suicide. Proxy-based interviews were conducted using SCID-I & SCID-II or K-SADS series behavioural personality-trait assessments. Secondarily, 246 living controls similarly assessed.Higher levels impulsivity, lifetime history aggression, novelty seeking associated with younger age...

10.1017/s0033291707001419 article EN Psychological Medicine 2007-09-06

Background: Mild behavioral impairment (MBI) and subjective cognitive decline (SCD) are dementia risk states, potentially represent neurobehavioral neurocognitive manifestations, respectively, of early stage neurodegeneration. Both MBI SCD predict incident dementia, associated with known biomarkers, both represented in the NIA-AA research framework for AD Stage 2 (preclinical disease). Objective: To assess associations SCD, alone combination, functional a population older adults. We tested...

10.3233/jad-201184 article EN Journal of Alzheimer s Disease 2021-02-02

Mild cognitive impairment (MCI) is an at-risk state for dementia; however, not all individuals with MCI transition to dementia, and some revert normal cognition (NC). Here, we investigate whether mild behavioral (MBI), the late-life onset of persistent neuropsychiatric symptoms (NPS), improves prognostic specificity MCI.

10.1212/wnl.0000000000200256 article EN cc-by-nc-nd Neurology 2022-03-29

Background The Canadian Network for Mood and Anxiety Treatments (CANMAT) last published clinical guidelines the management of major depressive disorder (MDD) in 2016. Owing to advances field, an update was needed incorporate new evidence provide revised recommendations assessment MDD adults. Methods CANMAT convened a editorial group comprised academic clinicians patient partners. A systematic literature review conducted, focusing on reviews meta-analyses since 2016 guidelines....

10.1177/07067437241245384 article EN cc-by The Canadian Journal of Psychiatry 2024-05-06

Abstract Background Depressive disorders are the most common diagnosis among individuals who die by suicide, and intermittent theta-burst stimulation (iTBS) is a noninvasive treatment for those with difficult-to-treat depression at higher risk suicide. Previous data suggests that pairing iTBS D-cycloserine, partial N-methyl-D-aspartate (NMDA) receptor agonist, improves antidepressant outcomes. However, its impact on suicide not known. Methods We examine suicidal ideation implicit after...

10.1017/s0033291724003313 article EN Psychological Medicine 2025-01-01

There is substantial evidence suggesting that suicide aggregates in families. However, the extent of overlap between liability to and psychiatric disorders, particularly major depressive disorder, remains an important issue. Similarly, factors account for familial transmission suicidal behavior remain unclear. Thus, through direct blind assessment first-degree relatives, authors conducted a family study by examining three proband groups: probands who committed context living depressed with...

10.1176/appi.ajp.2009.08111744 article EN American Journal of Psychiatry 2009-09-16

Article Abstract Background: Borderline personality disorder is a major risk factor for suicidal behavior, yet prediction of suicide completion remains unclear. It has been proposed that impulsivity and aggression interact to increase risk. Death by in borderline disorder, then, may be the result impulsivity, core feature interacting with violent-aggressive tendencies. Using case-control design, this study investigated clinical behavioral factors disorder. Method: One hundred twenty subjects...

10.4088/jcp.v68n0509 article EN The Journal of Clinical Psychiatry 2007-05-15

<h3>Background:</h3> Suicidal behaviour aggregates in families, and the hypothalamic–pituitary–adrenal (HPA) axis noradrenergic dysregulation may play a role suicide risk. It is unclear whether stress heritable trait of or how it might increase We investigated reactivity autonomic nervous system HPA predisposition characterized effect this on neuropsychologic function. <h3>Methods:</h3> In family-based study first-degree relatives (<i>n</i> = 14) completers matched controls with no family...

10.1503/jpn.090121 article EN Journal of Psychiatry and Neuroscience 2010-11-01

Wide-field-of-view mesoscopic cortical imaging with genetically encoded sensors enables decoding of regional activity and connectivity in anesthetized behaving mice; however, the kinetics most can be suboptimal for vivo characterization frequency bands higher than 1-3 Hz. Furthermore, existing sensors, particular those that measure calcium (genetically indicators; GECIs), largely monitor suprathreshold activity. Using a sensor extracellular glutamate imaging, we demonstrate rapid virally...

10.1523/jneurosci.2744-15.2016 article EN cc-by-nc-sa Journal of Neuroscience 2016-01-27

Background: Assessing neuropsychiatric symptoms (NPS) in older adults is important for determining dementia risk. Mild behavioral impairment (MBI) an at-risk state cognitive decline and dementia, characterized by emergent NPS later life. MBI has significantly higher incidence than late life psychiatric conditions. However, its utility as a proxy neurodegeneration not been demonstrated. Plasma neurofilament light (NfL) validated biomarker of axonal damage, shown to associate with hallmarks...

10.3233/jad-200011 article EN Journal of Alzheimer s Disease 2020-06-24

The antidepressant effects of transcranial magnetic stimulation protocols for major depressive disorder (MDD) are thought to depend on synaptic plasticity. theta-burst (TBS) protocol plasticity is known be N-methyl-D-aspartate (NMDA)-receptor dependent, yet it unknown whether enhancing NMDA-receptor signaling improves treatment outcomes in MDD.To test low doses the partial-agonist, D-cycloserine, would enhance intermittent TBS (iTBS) MDD.This was a single-site 4-week, double-blind,...

10.1001/jamapsychiatry.2022.3255 article EN JAMA Psychiatry 2022-10-12

Dementia assessment includes cognitive and behavioral testing with informant verification. Conventional is resource-intensive, uneven access. Online unsupervised assessments could reduce barriers to risk assessment. The aim of this study was assess the relationship between informant-rated changes participant-completed neuropsychological test performance in older adults, both measured remotely via an online platform, Brain Health Registry (BHR).Observational cohort study.Community-dwelling...

10.1017/s1041610221002878 article EN cc-by-nc-nd International Psychogeriatrics 2022-02-08
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