Patricia A Shewokis

Patricia A Shewokis
Drexel University | DU · Department of Nutrition Sciences

PhD

About

172
Publications
37,847
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3,221
Citations
Introduction
Patricia A Shewokis currently works at the Department of Nutrition Sciences, and in the School of Biomedical Engineering, Science and Health Systems at Drexel University. Her current project is 'Transfer of Training and Optical Imaging within Immersive Virtual Environments.' Methods and techniques employed included: task analyses, cognitive workload assessments, cognitive load theory applications with optical imaging, transfer of learning designs, longitudinal designs and univariate, multivariate and linear mixed effects models analyses. Currently teaches graduate courses in intermediate biostatistics and statistical power analyses and effect sizes along with various independent studies and research practica on methodologies, applications and statistical analyses.
Additional affiliations
November 2013 - present
Drexel University College of Medicine
Position
  • Professor (Full)
July 2012 - present
Drexel University
Position
  • Professor (Full)
March 2007 - present
Drexel University
Position
  • Professor (Full)

Publications

Publications (172)
Article
Full-text available
Assessment of expertise development during training program primarily consists of evaluating interactions between task characteristics, performance, and mental load. Such a traditional assessment framework may lack consideration of individual characteristics when evaluating training on complex tasks, such as driving and piloting, where operators ar...
Article
Objective Poor vitamin D and Magnesium status is observed in individuals who are overweight and obese (Owt/Ob) and is often associated with heightened cardiovascular disease risk. Magnesium is a cofactor that assists in vitamin D metabolism. We aimed to determine (1) the efficacy of a combined magnesium and vitamin D regimen compared to vitamin D o...
Article
Background The sense of ‘loss of control’ (LOC), or a feeling of being unable to stop eating or control what or how much one is eating, is the most salient aspect of binge eating. However, the neural alterations that may contribute to this experience and eating behavior remain poorly understood. Methods We used functional near-infrared spectroscop...
Article
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Fidget spinners have been marketed as repetitive motion devices that improve attention and motor performance, and as such, they have become quite appealing to individuals with Attention Deficit Hyperactive Disorder (ADHD). To date, no studies have explored changes in brain activity that may occur due to fidgeting in ADHD. Our aim was to use functio...
Conference Paper
Full-text available
Functional near infrared spectroscopy (fNIRS) measurements are confounded by signals originating from different physiological causes (i.e., neuronal, Mayer wave, respiratory, and cardiac), whose time-frequency characteristics are modulated by the experimental task. Most fNIRS research reports workload measures from very low frequency (VLF) band as...
Article
Full-text available
Functional near infrared spectroscopy (fNIRS) measurements are confounded by signal components originating from multiple physiological causes, whose activities may vary temporally and spatially (across tissue layers, and regions of the cortex). Furthermore, the stimuli can induce evoked effects, which may lead to over or underestimation of the actu...
Preprint
Full-text available
With tasks becoming more mentally focused and operators being required to conduct multiple tasks simultaneously, it is important to not only acquire direct measurements from the brain, but also account for changes in performance and brain activity as a function of intersubject variability and task demands. Such methodology is particularly important...
Conference Paper
Full-text available
This study aims to utilize a non-invasive and portable neuroimaging modality – functional near infrared spectroscopy (fNIRS) to investigate training and transfer of skills in unmanned aerial system (UAS) sensor operators (SOs). To achieve this objective, we recruited 13 novice participants and exposed them to three similar training sessions followe...
Conference Paper
Unmanned aerial system (UAS) sensor operators continue to experience increasing levels of workload due to progressively complex systems, yet few studies have effectively recreated realistic transitional workload conditions. Human operators experience a variety of challenges during execution of tasks (e.g., visibility changes, object prevalence, sus...
Article
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Over 2.8 million people experience mild traumatic brain injury (TBI) in the United States each year, which may lead to long-term neurological dysfunction. The mechanical forces that are caused by TBI propagate through the brain to produce diffuse axonal injury (DAI) and trigger secondary neuroinflammatory cascades. The cascades may persist from acu...
Preprint
Full-text available
Functional near infrared spectroscopy (fNIRS) measurements are confounded by signal components originating from multiple physiological causes, whose activities may vary temporally and spatially (across tissue layers, and regions of the cortex). Furthermore, the stimuli can induce evoked effects, which may lead to over or underestimation of the actu...
Article
Cerebral tissue oximetry (CTO) based on near-infrared spectroscopy provides clinically relevant information on tissue perfusion and has been used specifically in infant monitoring and during cardiac surgeries. With different sensor designs in the selection and configuration of light sources and detectors and implemented analysis algorithms in tissu...
Article
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The goal of this study was to examine the effects of task-related variables, such as the difficulty level, problem scenario, and experiment week, on performance and mental workload of 27 healthy adult subjects during problem solving within the spatial navigation transfer (SNT) game. The study reports task performance measures such as total time spe...
Article
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Background: Many inpatients experience cardiac arrest and mortality in this population is extremely high. Simulation is frequently used to train code teams with the goal of improving these outcomes. A key step in designing such a training curriculum is to perform a needs assessment. We report on the effectiveness of a simulation-based training pro...
Article
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Cognitive abilities such as attention, memory, processing time, perception, and reasoning can be augmented using some type of intervention. Within the broad range of conventional and unconventional intervention methods used in cognitive enhancement, meditation is one of those that is safe, widely practiced by many since ancient times, and has been...
Article
A large peak hip adduction angle during running is a risk factor for several overuse injuries in women. The purpose of this study was to determine if female runners with a large peak hip adduction angle have differences in eccentric hip abductor muscle strength, hip neuromuscular control, and/or hip width to femoral length ratio (HW:FL) compared to...
Chapter
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Despite increasing popularity, media attention, and commercial success of fidget spinners, scientific evidence on their effectiveness is scarce. The purpose of this study was to explore how fidget spinners affect fine motor performance and its neural correlates in the Prefrontal Cortex (PFC). Functional Near Infrared Spectroscopy (fNIRS) was used t...
Article
Background Sedentary behavior activities have been associated with an increased risk of type 2 diabetes. Aim: Our aim was to determine whether sedentary behavior time (SBT) is predictive of hemoglobin A1c (HbA1c) ≥ 6.5% (48 mmol/mol). Methods We used cross-sectional data, adults 40 to 59 years of age, from the National Health and Nutrition Examina...
Article
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Neuromyths are false beliefs, often associated with teaching and learning, that stem from misconceptions or misunderstandings about brain function. While belief in neuromyths has been established as prevalent among the general public and K-12 teachers, literature about neuromyth belief among higher education professionals (instructors, instructiona...
Article
Vitamin D metabolism is dependent on magnesium (Mg) as a cofactor; therefore, poor Mg status may alter the relationship between vitamin D metabolite serum 25-hydroxyvitamin D (s25OHD) and serum parathyroid hormone (sPTH). We hypothesized that low dietary Mg intake may alter sPTH response to s25OHD in a population with excess body weight, thereby le...
Article
The human capability to learn new motor skills depends on the efficient engagement of cognitive-motor resources, as reflected by mental workload, and psychological mechanisms (e.g., self-efficacy). While numerous investigations have examined the relationship between motor behavior and mental workload or self-efficacy in a performance context, a fai...
Article
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The aim of this study was to generate a method for calculating heart rate variability (HRV) from electrocardiogram (ECG) waveforms. The waveforms were recorded by a HR monitor that participants (youth with cerebral palsy (CP)) wore during active video game (AVG) sessions. The AVG sessions were designed to promote physical activity and fitness (aero...
Article
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Objectives: We examined the effect of a three year, multi-component, school-based intervention on health behaviors of elementary school students. Methods: The multi-component, obesity intervention was provided by community partners to 13 schools over three years. Schools were assigned into three varying Levels of Intervention: "Core" Schools (n...
Article
Objective: We incorporated a hybrid-abdominal wound simulation to teach/assess the acquisition of three essential clinical skills in the ACS/ASE Medical Student Simulation-based Surgical Skills Curriculum. Method: Third year students (N = 43) attended a workshop based on the ACS/ASE surgical skills curriculum for drain care/removal, staple remov...
Article
Background: Most brain machine interfaces (BMI) focus on upper body function in non-injured animals, not addressing the lower limb functional needs of those with paraplegia. A need exists for a novel BMI task that engages the lower body and takes advantage of well-established rodent spinal cord injury (SCI) models to study methods to improve BMI p...
Article
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Few investigations have examined mental workload during motor practice or learning in a context of team dynamics. This study examines the underlying cognitive-motor processes of motor practice by assessing the changes in motor performance and mental workload during practice of reaching movements. Individuals moved a robotic arm to reach targets as...
Article
Appendiceal mucoceles (AMs) are rare mucin-containing neoplasms with malignant potential. Lack of evidence-based data exists defining clinicopathological features for management. MEDLINE search between 1995 and 2015 was performed using search criteria "Appendix mucocele." Systematic review of patient-, pathologic-, and treatment-related characteris...
Article
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Introduction In today’s team-oriented healthcare environment, high-quality patient care requires physicians to possess not only medical knowledge and technical skills but also crisis resource management (CRM) skills. In emergency medicine (EM), the high acuity and dynamic environment makes CRM skills of physicians particularly critical to healthcar...
Article
Objectives/hypothesis: To characterize socioeconomic status (SES) variables of spasmodic dysphonia (SD) patients and determine their impact on voice outcomes after treatment with botulinum toxin. Study design: Retrospective review. Materials and methods: SD patients treated with botulinum toxin for the past 10 years (July 2007-July 2017) for w...
Article
Full-text available
An accurate measure of mental workload level has diverse neuroergonomic applications ranging from brain computer interfacing to improving the efficiency of human operators. In this study, we integrated electroencephalogram (EEG), functional near-infrared spectroscopy (fNIRS), and physiological measures for the classification of three workload level...
Article
The assessment of mental workload can inform attentional resource allocation during task performance that is essential for understanding the underlying principles of human cognitive-motor behavior. While many studies have focused on mental workload in relation to human performance, a modest body of work has examined it in a motor practice/learning...
Article
A brain-computer interface that measures the mental workload level of operators has applications in human-computer interactions (HCI) for reducing human error and improving work efficiency. In this study, concurrently recorded electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) were combined at the decision fusion stage f...
Article
Full-text available
The present study investigates brain-to-brain coupling, defined as inter-subject correlations in the hemodynamic response, during natural verbal communication. We used functional near-infrared spectroscopy (fNIRS) to record brain activity of 3 speakers telling stories and 15 listeners comprehending audio recordings of these stories. Listeners’ brai...
Article
Background: Using functional near infrared spectroscopy, a noninvasive, optical brain imaging tool that monitors changes in hemodynamics within the prefrontal cortex (PFC), we assessed performance and cognitive effort during the acquisition, retention and transfer of multiple simulated laparoscopic tasks by novice learners within a contextual inte...
Conference Paper
BACKGROUND: The Youth Health Behavior Survey (YHBS) is a 26-item survey with items in the domains of physical activity (PA), nutrition, and access to preventative health services. Although the YHBS was developed from previously validated tools, the validity of the YHBS itself has not been previously validated. PURPOSE: To validate baseline PA from...
Article
Full-text available
The present study investigates brain-to-brain coupling, defined as inter-subject correlations in the hemodynamic response, during natural verbal communication. We used functional near-infrared spectroscopy (fNIRS) to record brain activity of speakers telling stories and listeners comprehending audio recordings of these stories. Listeners' brain act...
Article
Background: Pancreaticoduodenectomy needs simple, validated risk models to better identify 30-day mortality. The goal of this study is to develop a simple risk score to predict 30-day mortality after pancreaticoduodenectomy. Methods: We reviewed cases of pancreaticoduodenectomy from 2005-2012 in the American College of Surgeons-National Surgical...
Article
Objectives/hypothesis: Computer-aided instruction (CAI) is defined as instruction in which computers play a central role as the means of information delivery and direct interaction with learners. Computer-aided instruction has become mainstream in medical school curricula. For example, a three-dimensional (3D) computer module of the larynx has bee...
Article
Background: We describe initial success in designing and implementing an objective evaluation for opening and closing a simulated abdomen. Methods: (1) An assessment for laparotomy was created using peer-reviewed literature, texts, and the input of academic surgeons nationally; (2) the assessment was evaluated for construct validity, comparing t...
Article
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The objectives of this communication are to present the methods used to calculate mean absolute relative phase (MARP), deviation phase (DP) and point estimate relative phase (PRP) and compare their utility in measuring postural coordination during the performance of a serial reaching task. MARP and DP are derived from continuous relative phase time...
Article
Full-text available
The prefrontal cortex (PFC) plays an important role in cognitive process related to executive function, but is also active during resting states. Quantifying prefrontal cortex activity during resting states provides a baseline for interpreting task-induced brain activity. Researchers commonly use resting conditions where participants are prompted t...
Article
Full-text available
The prefrontal cortex (PFC) plays an important role in cognitive function, involved in Executive Functions (EFs) such as planning, working memory, and inhibition. Activation in the PFC also occurs during some motor activities. One commonly used tool to assess EF is the Tower of Hanoi, demonstrating sensitivity to PFC dysfunction. However, limited n...
Article
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Background Haptic display technologies are well suited to relay proprioceptive, force, and contact cues from a prosthetic terminal device back to the residual limb and thereby reduce reliance on visual feedback. The ease with which an amputee interprets these haptic cues, however, likely depends on whether their dynamic signal behavior corresponds...
Conference Paper
Full-text available
Head controlled based systems represent a class of human body-machine interfaces that employ head motion to control an external device. Overall, the related work has focused on technical developments with limited user performance assessments while generally ignoring the underlying motor learning and cognitive processes. Thus, this study examined, d...
Conference Paper
Full-text available
Functional near infrared spectroscopy (fNIR) is a noninvasive, portable optical imaging tool to monitor changes in hemodynamic responses (i.e., oxygenated hemoglobin (HbO)) within the prefrontal cortex (PFC) in response to sensory, motor or cognitive activation. We used fNIR for monitoring PFC activation during learning of simulated laparoscopic su...
Conference Paper
Full-text available
Simultaneously recorded electroencephalography (EEG) and functional near infrared spectroscopy (fNIRS) measures from sixteen subjects were used to assess neural correlates of a letter based n-back working memory task. We found that EEG alpha power increased and prefrontal cortical oxygenation decreased with increased practice time for the high memo...
Article
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Recent advances in myoelectric prosthetic technology have enabled more complex movements and interactions with objects, but the lack of natural haptic feedback makes object manipulation difficult to perform. Our research effort aims to develop haptic feedback systems for improving user performance in object manipulation. Specifically, in this work...
Article
Full-text available
Neuroimaging technologies, such as functional near-infrared spectroscopy (fNIR), could provide performance metrics directly from brain-based measures to assess safety and performance of operators in high-risk fields. In this paper, we objectively and subjectively examine the cognitive workload of air traffic control specialists utilizing a next-gen...
Article
Full-text available
Electronically controlled prosthetic devices offer more function-ality than traditional prostheses, but the lack of haptic feedback makes everyday tasks difficult to perform. This research effort ex-plores the effectiveness of vibratory tactile feedback of slip infor-mation for improving performance in object manipulation, specif-ically for graspin...
Article
Full-text available
Cognitive impairment in amyotrophic lateral sclerosis (ALS) is associated with cortical changes beyond the motor cortex. The overall goal of this project is to determine if task induced hemodynamic changes detected by functional near infrared (fNIR) spectroscopy from the anterior prefrontal cortex (PFC) has discriminant validity across ALS (n = 17)...