Margaret Legarreta

ORCID: 0000-0003-1345-9390
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About
Contact & Profiles
Research Areas
  • Traumatic Brain Injury Research
  • Suicide and Self-Harm Studies
  • Functional Brain Connectivity Studies
  • Posttraumatic Stress Disorder Research
  • Resilience and Mental Health
  • Advanced MRI Techniques and Applications
  • Musculoskeletal pain and rehabilitation
  • Biochemical effects in animals
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Stress Responses and Cortisol
  • Heart Rate Variability and Autonomic Control
  • Dementia and Cognitive Impairment Research
  • Neuroscience and Neuropharmacology Research
  • Pain Mechanisms and Treatments
  • Psychosomatic Disorders and Their Treatments
  • Nicotinic Acetylcholine Receptors Study
  • Healthcare professionals’ stress and burnout
  • Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Pediatric Pain Management Techniques
  • Migration, Health and Trauma
  • Advanced Neuroimaging Techniques and Applications
  • Health, Environment, Cognitive Aging
  • Advanced NMR Techniques and Applications
  • Memory and Neural Mechanisms
  • Older Adults Driving Studies

Mental Illness Research, Education and Clinical Centers
2015-2025

Sheridan VA Medical Center
2020-2025

University of Utah
2016-2021

Rocky Mountain University of Health Professions
2021

VA Rocky Mountain Network
2018-2020

VA Salt Lake City Healthcare System
2016-2020

George E. Wahlen Department of VA Medical Center
2018

Abstract Introduction Although mild traumatic brain injury ( mTBI ) comprises 80% of all TBI , the morphological examination orbitofrontal cortex OFC in relation to clinical symptoms such as aggression, anxiety and depression a strictly sample has never before been performed. Objectives The primary objective study was determine if patients would show differences morphology this region relate symptoms. Methods Using structural images acquired 3T MRI machine, cortical thickness volume...

10.1002/brb3.581 article EN cc-by Brain and Behavior 2016-09-28

Trauma-related diagnoses such as posttraumatic stress disorder (PTSD) are prevalent in veterans. The identification of mechanisms related to vulnerability and development PTSD specifically a veteran population may aid the prevention novel treatment targets.Veterans with (n = 27), trauma-exposed veterans no (TEC, n 18) non-trauma-exposed controls (NTEC, 28) underwent single-voxel proton (1H) magnetic resonance spectroscopy (MRS) at 3 Tesla dorsal anterior cingulate cortex (dACC) using...

10.1016/j.jad.2019.01.037 article EN cc-by-nc-nd Journal of Affective Disorders 2019-01-31

Introduction An average of 17.5 Veterans died by suicide each day in 2021, highlighting the importance research and prevention efforts aimed at risk. Attentional processes have emerged as a possible predictor behaviors (SB), yet associated neural correlates remain understudied, particularly Veteran population. Methods The current study examines sustained selective attention performance indexed Ruff 2 & 7 Selective Attention Test anterior cingulate cortex (ACC) volume they relate to...

10.3389/fpsyt.2024.1495046 article EN cc-by Frontiers in Psychiatry 2025-01-22

Posttraumatic stress disorder (PTSD) has a primary etiology in experiencing psychological trauma and the subsequent sequelae ( American Psychiatric Association, 2013 Association. (2013). Diagnostic statistical manual of mental disorders (5th ed.). Washington, DC: Author.[Crossref] , [Google Scholar]). There are multiple types that may serve as index PTSD. This exploratory study compared DSM–5 PTSD symptoms for 3 veterans: combat (n = 36), sexual 21), civilian 21). Results indicated veterans...

10.1037/mil0000092 article EN Military Psychology 2016-01-21

A connection between suicidality and posttraumatic stress disorder (PTSD) has been consistently demonstrated; however, the underlying relationship PTSD remains unclear. The aim of this study was to examine patterns DSM-5 symptom endorsement that differentiated veteran participants with without a history suicide behaviors. We enrolled 95 veterans, 32 whom reported no ideation (SI) or attempts (SA). 63 remaining SI, 28 also reporting historical SA. Participants completed standardized...

10.1037/tra0000026 article EN other-oa Psychological Trauma Theory Research Practice and Policy 2015-02-23

Traumatic brain injury (TBI) is one of the most prevalent injuries in military with mild traumatic (mTBI) accounting for approximately 70–80 % all TBI. TBI has been associated diffuse and focal changes to structures networks underlying cognitive-emotional processing. Although anterior cingulate cortex (ACC) plays a critical role emotion regulation executive function susceptible mTBI, studies focusing on ACC resting state functional connectivity (rs-fc) Veterans are limited. mTBI (n = 49) no...

10.1016/j.bbr.2020.112882 article EN cc-by Behavioural Brain Research 2020-08-24

Suicide is a public health concern for United States veterans and civilians. Prior research has shown neurobiological factors in suicide. However, studies of neuroimaging correlates suicide risk have been limited. This study applied complex weighted network analyses to characterize the neural connectivity white matter with behavior. Twenty-eight without behavior (NS), 29 history suicidal ideation only (SI), 23 prior attempt (SA) completed diffusion tensor brain imaging, Columbia Severity...

10.1016/j.nicl.2018.04.021 article EN cc-by-nc-nd NeuroImage Clinical 2018-01-01

Veterans experience chronic pain more frequently than civilians. Identification of neurobiological mechanisms underlying the pathophysiology in a veteran population may aid development novel treatment targets. In this pilot proof-of-concept study, veterans with (N = 61) and no 19) completed clinical interviews, self-report questionnaires inquiring about history, interference daily life, catastrophizing, as well measures depressive anxious symptoms. also underwent single-voxel proton (1H)...

10.1016/j.neures.2020.03.002 article EN cc-by-nc-nd Neuroscience Research 2020-03-19

This study examined differences in suicidal ideation (SI) and suicide attempts (SAs) among veterans with chronic pain. Pain-specific variables, including catastrophic thinking, disability, sensory, affective, evaluative pain descriptors, were a focus. Structured diagnostic clinical interviews conducted to examine SI/SA mental health. Veterans completed the Clinical Interview for DSM-IV Columbia-Suicide Severity Rating Scale assess Axis I symptoms behavior(s). Self-report questionnaires used...

10.1097/nmd.0000000000000799 article EN The Journal of Nervous and Mental Disease 2018-02-02

Female Veterans are an increasing patient population in the Department of Affairs and may have distinct clinical neurobiological features compared to males. Nineteen female 19 male who met diagnostic criteria for depression/posttraumatic stress disorder (MDD/PTSD) completed interviews, symptom measures, resting-state neuroimaging. Participants measures mood aggression addition magnetic resonance imaging on a 3.0 Tesla Siemens scanner. Females showed increased functional connectivity between...

10.1016/j.jad.2020.05.016 article EN cc-by-nc-nd Journal of Affective Disorders 2020-06-02

Suicide is a public health concern in the civilian and veteran populations. Stressful life events are precipitating factors for suicide. The neurochemical underpinnings of association between stress/trauma suicide risk unclear, especially regards to sex differences. We hypothesized that gamma-amino butyric acid (GABA), major inhibitory neurotransmitter may be candidate critical stress veterans.Proton magnetic resonance spectroscopy (1H MRS) at 3.0 Tesla was used measure vivo neurochemistry...

10.1177/2470547018768771 article EN cc-by-nc Chronic Stress 2018-01-01

In this study of veterans, we used a state-of-the-art neuroimaging tool to probe the neurometabolic profile anterior cingulate cortex in veterans with traumatic brain injury (TBI). We report significantly elevated myoinositol levels TBI compared those without TBI.

10.1152/jn.00765.2019 article EN Journal of Neurophysiology 2020-03-18

Nonverbal memory decline is a concern associated with aging. Visuospatial tests often do not distinguish between learning, recall, or retrieval, yet such distinctions may help clarify the nature of difficulties. Further, many visuospatial rely on abilities directly related to (e.g. graphomotor skill). The present study examined feasibility and initial psychometric evidence Visual-Spatial Memory Recall Test (V-SMART).Ninety-nine adults (71% women) were recruited from two sources:...

10.1080/13854046.2017.1380845 article EN The Clinical Neuropsychologist 2017-09-28
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