A5061296525- Traumatic Brain Injury Research
- Cardiac Arrest and Resuscitation
- Traumatic Brain Injury and Neurovascular Disturbances
- Balance, Gait, and Falls Prevention
- Heart Rate Variability and Autonomic Control
- Injury Epidemiology and Prevention
- Motor Control and Adaptation
- Cardiovascular and Diving-Related Complications
- Neural dynamics and brain function
- Cerebral Palsy and Movement Disorders
- Animal Vocal Communication and Behavior
- Chaos control and synchronization
- Non-Invasive Vital Sign Monitoring
- Paranormal Experiences and Beliefs
- Occupational Health and Performance
- Cardiovascular Health and Disease Prevention
- Sports Dynamics and Biomechanics
- Sports Performance and Training
- Resilience and Mental Health
- Restraint-Related Deaths
- Musculoskeletal pain and rehabilitation
- High Altitude and Hypoxia
- Cardiovascular and exercise physiology
- Botulinum Toxin and Related Neurological Disorders
- Mechanics and Biomechanics Studies
Uniformed Services University of the Health Sciences
2017-2022
University of North Carolina at Greensboro
2016-2022
Naval Medical Research Command
2019-2021
National Institute of Neurological Disorders and Stroke
2021
National Institutes of Health
2021
Walter Reed Army Institute of Research
2021
Naval Submarine Medical Research Laboratory
2016-2018
Experimental Station
2018
United States Department of the Navy
2013-2017
University of Tennessee Health Science Center
2017
Combat military and civilian law enforcement personnel may be exposed to repetitive low-intensity blast events during training operations. Persons who use explosives gain entry (i.e., breach) into buildings are known as "breachers" or dynamic personnel. Breachers operate under the guidance of established safety protocols, but despite these precautions, breachers low-level throughout their careers frequently report performance deficits symptoms healthcare providers. Although little is about...
This study intended to determine if an acute bout of soccer heading alters postural control and pronounced self-reported symptoms cerebral concussion. Collegiate players were randomly assigned one 2 groups. Each participant completed a baseline assessment prior heading. Participants either simulated (control group; CG) or performed (experimental EG) 10 headers at 11.2 m/s in min. The was repeated post hrs 1, 24, 48. parameter assessed the root mean square (RMS) center mass (COM). COM RMS...
Previous work has shown that fractal patterns in gait can be altered by entraining to a stimulus. However, little is understood about how long those are retained or which factors may influence stronger entrainment retention. In experiment one, participants walked on treadmill for 45 continuous minutes, was separated into three phases. The first 15 minutes (pre-synchronization phase) consisted of walking without stimulus, the second while visual stimulus (synchronization phase), and last...
This study evaluated the utility of Balance Error Scoring System (BESS) and Sensory Organization Test (SOT) as tools for screening monitoring Service members (SMs) with mild traumatic brain injury (mTBI) in a deployed setting during acute subacute phases recovery. Patient records (N = 699) were reviewed cohort SMs who sustained blast-related mTBI while to Afghanistan treated at Concussion Restoration Care Center (CRCC) Camp Leatherneck. On initial intake into CRCC, participants completed two...
Purpose: Balance impairment is a common sensorimotor symptom in mild traumatic brain injury (mTBI). We designed an affordable, portable virtual reality (VR)-based balance screening device (Virtual Environment TBI Screen [VETS]), which will be validated relative to the Neurocom Sensory Organization Test (SOT) determine if it can replace commonly used postural assessments.Methods: This preliminary study examines healthy adults (n = 56) and with mTBI 11). Participants performed six upright...
Background and Purpose: Instability is a significant risk factor for falls in individuals with bilateral labyrinthine deficit. The purpose of this case report to describe an intervention that we found improve balance patient deficit using training paradigm based on the sensory reweighting hypothesis. Case Description: participant was female 10 years post-onset instructed focus motion her hips knees while standing dynamic platform either stationary or matched excursion center mass (COM) but...
<h3>Objective:</h3> To examine whether blast exposure alone and blast-associated concussion result in similar neurologic mental health symptoms. <h3>Methods:</h3> A 14-item questionnaire was administered to male US Marines on their return from deployment Iraq and/or Afghanistan. <h3>Results:</h3> total of 2,612 (median age 22 years) completed the survey. Of those, 2,320 (88.9%) reported ≥1 during current prior deployments. In addition, 1,022 (39.1%) deployment, 731 (28.0%) had experienced at...
Blast exposure is a prevalent cause of mild traumatic brain injury (mTBI) in military personnel combat. However, it more common for service member to be exposed low-level blast (LLB) that does not result clinically diagnosable mTBI. Recent research suggests repetitive LLB can symptomology similar symptoms observed after This manuscript reports on the use an Android-based smartphone application (AccWalker app) capture changes neuromotor functioning exposure. Active duty U.S. Navy (N = 59)...
Objective: Postural control is frequently compromised after sub-concussive and concussive head trauma, balance testing an integral part of neuromotor assessment management. The main objective this paper to develop a novel smartphone-based protocol for screening dynamic decrements stemming from trauma. Approach: Experiments 1 2 compared Android smartphone orientation detection algorithms biomechanics laboratory motion capture system using pendulum (i.e. non-biological movement) human stepping...
Abstract Objectives: The Automated Neuropsychological Assessment Metrics 4 TBI-MIL (ANAM4) is a computerized cognitive test often used in post-concussion assessments with U.S. service members (SMs). However, existing evidence remains mixed regarding ANAM4’s ability to identify issues following mild traumatic brain injury (mTBI). Studies typically examine ANAM4 using standardized scores and/ or comparisons baseline. A more fine-grained approach involves examining inconsistency within an...
Military service members are frequently subjected to subconcussive blast events during training and deployment. Emerging evidence suggests exposures of these magnitudes may have long-term consequences for dimensions cognitive function. Less is known about sequelae acutely following deployment-related events. The current study addressed this knowledge gap by assessing the extent which exposure affected performance on Automated Neuropsychological Assessment Metrics 4 TBI-MIL (ANAM)....
To establish the reliable change parameters for Automated Neuropsychological Assessment Metrics (ANAM) using a healthy normative sample of active duty service members (SMs) and apply to recently deployed SMs.Postdeployment neurocognitive performance was compared in 1893 US Marines with high rates combat exposure during deployment. Of sample, 289 SMs had data 2 predeployment assessments were used as subsample 502 postdeployment subsample. On basis self-report, further classified concussed (n...
To examine differences between the baseline-referenced and norm-referenced approaches for determining decrements in Automated Neuropsychological Assessment Metrics Version 4 TBI-MIL (ANAM) performance following mild traumatic brain injury (mTBI).ANAM data were reviewed 616 US Service members, with 528 of this sample having experienced an mTBI 88 controls.Post-injury change scores calculated each sub-test: (1) normative score = in-theater - mean (2) baseline pre-deployment baseline. Reliable...
Background Computerized neurocognitive testing (NCAT) has been proposed to be useful as a screening tool for post-deployment cognitive deficits in the setting of mild traumatic brain injury (mTBI). We assessed clinical utility post-injury/post-deployment Automated Neurocognitive Assessment Metric (ANAM) testing, using longitudinal design compare baseline ANAM tests with two group Marines who experienced combat during deployment. Methods and Findings Post-deployment performance symptom...
Successful submarine operations rely on the performance of tactical teams who must work under conditions physiological and cognitive fatigue. Sleep loss circadian disruption contribute to fatigue in this setting and, although effects have been studied extensively individuals, little is understood about how impacts team Рespecially a environment. The present review provides an overview divided into four main sections: 1) A discussion factors that should be considered research. 2) An outline...
Neurocognitive assessment tools (NCAT) are commonly used to screen for changes in cognitive functioning following a mild traumatic brain injury and assist with return duty decision. As such, it is critical determine if performance on the Defense Automated Neurobehavioral Assessment (DANA) adversely affected by operationally-relevant field environments. Differences DANA between thermoneutral environment three simulated environments across thermal stress continuum were calculated 16 healthy...
Postural control and stress reactivity were investigated in active duty coast guard personnel to determine whether they are sensitive lifetime effects of mild traumatic brain injury (mTBI). A custom-designed validated virtual reality-based computerized posturography device was used assess postural stability, whereas emotional assessed using the acoustic startle response (ASR), neurocognitive performance defense-automated neurobehavioral assessment (DANA). It hypothesized that residual subtle...
The influence of prolonged and repeated water immersions on heart rate variability (HRV) complexity was examined in 10 U.S. Navy divers who completed six-hour resting dives five consecutive days. Pre-dive during-dive measures were recorded daily.Dependent variables interest average (HR), time-domain HRV [root mean square successive differences the normal RR (NN) interval (RMSSD), standard deviation NN (SDNN)], frequency-domain [low-frequency power spectral density (psd) (LFpsd),...
The purpose of this study is to utilize a natural history approach describe and understand symptom recovery in personnel diagnosed with blast-related mild traumatic brain injury (mTBI) resulting from an improvised explosive device blast. population included military who experienced blast mTBI while mounted (vehicle; n = 176) or dismounted (on foot; 37) (N 213). Patients had no co-morbid psychiatric muscle–skeletal issues were treated within 72 h injury. Prevalence duration self-reported...
Transitioning between different sensory environments is known to affect sensorimotor function and postural control. Water immersion presents a novel environmental stimulus common many professional recreational pursuits, but not well-studied with regard its effects upon transitioning back land. The authors investigated the of long-duration water on terrestrial control outcomes in veteran divers. Eleven healthy men completed 6-hour thermoneutral pool dive (4.57 m) breathing diver air. Center...
Objective: The goal of this effort to investigate if experienced breachers, professionals with a career history exposure repeated low-level blasts, exhibited postural instability. Methods: Postural data were examined using traditional tests means and compared normative data. Results: Breachers had significantly lower NeuroCom Sensory Organization Test (SOT) visual scores (within limits), prolonged Limits Stability (LOS) test reaction time (30% breachers 7% controls testing abnormal), slower...
The Automated Neuropsychological Assessment Metrics 4 TBI-MIL (ANAM4) is a computerized cognitive test often used in post-concussion assessments with U.S. service members (SMs). Existing evidence, however, remains mixed regarding ANAM4's ability to identify issues following mild traumatic brain injury (mTBI). Studies typically examine ANAM4 by comparing mean scores baseline or normative scores. A more fine-grained approach involves examining inconsistency within an individual's performance.