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Articles 1 - 30 of 70
Full-Text Articles in Life Sciences
Balance Inefficiencies In Athletes With Lower Extremity Surgeries, Susannah Arnn, Gannon Connelley, Terrence Murray
Balance Inefficiencies In Athletes With Lower Extremity Surgeries, Susannah Arnn, Gannon Connelley, Terrence Murray
Scholars Day Conference
The purpose of this study is to observe the initial difference in the balance of athletes with and without lower extremity surgeries; and determine whether a simple balance intervention is impactful. After four weeks of this program, we will determine if the volunteers’ balance has remained the same, progressed, or declined and if the athlete has overcompensated in the injured extremity.
Lower Body Gait Variability As A Distinguishing Feature In Humans, Tyler M. Wiles, Seung Kyeom Kim, Nick Stergiou, Aaron D. Likens
Lower Body Gait Variability As A Distinguishing Feature In Humans, Tyler M. Wiles, Seung Kyeom Kim, Nick Stergiou, Aaron D. Likens
UNO Student Research and Creative Activity Fair
Most humans have a fingerprint that is unique and persists throughout life. The same may be true for gait. Each person is unique physiologically and biomechanically, and has experienced a unique progression of life including injuries, habits, hobbies, or lifestyles that all contribute to navigating the world. Those individualized experiences, whether intended or not, are potentially on display in gait. We hypothesized that there are gait characteristics intrinsic and unique to everyone, so that everyone has a unique “gaitprint”, similar to humans possessing unique fingerprints. To test our hypothesis, we recruited thirty healthy young adults between the ages 19-35 as …
Functional Outcomes Of Noninvasive Sensory Feedback In Upper Limb Prostheses: A Meta-Analysis, Libby Caldwell
Functional Outcomes Of Noninvasive Sensory Feedback In Upper Limb Prostheses: A Meta-Analysis, Libby Caldwell
UNO Student Research and Creative Activity Fair
Noninvasive sensory feedback applies vibration or pressure to the residual limb and is thought to improve the functionality of upper limb prostheses. However, the efficacy of this approach has not been sufficiently investigated, particularly regarding actual amputee efficacy. The purpose of this study was to evaluate the functional benefits of noninvasive sensory feedback in upper limb prostheses through a meta-analysis. Electronic databases (MEDLINE, Web of Science, and PubMed) were searched up to October 2022 using the following search terms: (prosthesis OR prosthetic) AND (hand OR arm OR forearm OR transradial OR “upper limb” OR “upper extremity) AND (tactile OR haptic …
Walking With A Load On Wheels: Potential Effects Of Bidirectional Springs On Walking Economy, Hiva Razavi, Philippe Malcolm
Walking With A Load On Wheels: Potential Effects Of Bidirectional Springs On Walking Economy, Hiva Razavi, Philippe Malcolm
UNO Student Research and Creative Activity Fair
Walking with a Load on Wheels: Potential Effects of Bidirectional Springs on Walking Economy
Have you ever noticed how your arms alternatively flex and extend when pushing a heavy shopping cart? Accelerating and decelerating heavy masses, such as a shopping cart, can require much effort. During walking, we alternatively accelerate and decelerate our Center of Mass (COM) in every gait cycle, which can require even more effort if we accelerate and decelerate a load while walking. Theoretically, this effort can be reduced by timing the acceleration and deceleration of the load's mass opposite to the individual's COM. Previous studies have …
Inter-Joint Variability And Age-Related Changes In Human Walking, Mehrnoush Haghighatnejad, Tyler Wiles, Seung Kyeom Kim, Aaron Likens, Nicholas Stergiou
Inter-Joint Variability And Age-Related Changes In Human Walking, Mehrnoush Haghighatnejad, Tyler Wiles, Seung Kyeom Kim, Aaron Likens, Nicholas Stergiou
UNO Student Research and Creative Activity Fair
Inter-Joint Variability and Age-Related Changes in Human Walking
Mehrnoush Haghighatnejad1*, Tyler M. Wiles1, Seung Kyeom Kim1, Nick Stergiou1,2, Aaron D. Likens1
1Department of Biomechanics, University of Nebraska at Omaha
2Department of Physical Education and Sport Science, Aristotle University, Thessaloniki, Greece
*Corresponding author’s email: mhaghighatnejad@unomaha.edu
Presentation Preference: Poster
Humans routinely perform a variety of activities such as walking, running, driving, and typing, all of which require coordination among different body joints. For instance, walking and running involve rhythmic movements of the arms and legs. The involvement of the upper …
Negative Impact Of Aging On Gait Autocorrelation: A Mixed-Effects Analysis Of Stride Interval Dynamics, Theodore Deligiannis, Tyler M. Wiles, Seung Kyeom Kim, Nikolaos Stergiou, Aaron Likens
Negative Impact Of Aging On Gait Autocorrelation: A Mixed-Effects Analysis Of Stride Interval Dynamics, Theodore Deligiannis, Tyler M. Wiles, Seung Kyeom Kim, Nikolaos Stergiou, Aaron Likens
UNO Student Research and Creative Activity Fair
NEGATIVE IMPACT OF AGING ON GAIT AUTOCORRELATION: A MIXED-EFFECTS ANALYSIS OF STRIDE INTERVAL DYNAMICS
Theodore A. Deligiannis1*, Tyler M. Wiles1, Seung Kyeom Kim1, Nick Stergiou1,2, Aaron D. Likens1
1Department of Biomechanics, University of Nebraska at Omaha
*Corresponding author’s email: tdeligiannis@unomaha.edu
Presentation preference: Podium
Traditional gait metrics, like speed, cadence, coordination, as well as non-linear measures, appear related to Timed Up and Go (TUG). Timed Up and Go is a clinical measurement related to physical, socioeconomic, and psychological parameters, as well as overall health. TUG can be used as a health …
Accelerometry-Based Analysis Of Postural Sway In Parkinson's Disease Patients With Levodopa-Induced Dyskinesia, Chandler Brock
Accelerometry-Based Analysis Of Postural Sway In Parkinson's Disease Patients With Levodopa-Induced Dyskinesia, Chandler Brock
UNO Student Research and Creative Activity Fair
Parkinson’s disease (PD) is a progressive neurodegenerative disorder, with patient numbers projected to double to 12 million in the next 20 years. Levodopa-induced dyskinesia (LID) is a major problem associated with the long-term use of levodopa for symptomatic treatment of PD. These involuntary movements can become disabling and may interfere with quality of life. Our prior research showed that PD w/ LID were less stable while standing (i.e., increased postural sway) and had a higher incidence of falls. The aim of this study is to determine if postural sway properties are altered by LID via decomposing the sway signal. We …
Walking Easier By Attaching A Spring-Mass To The Body: A Preliminary Simulation, Hiva Razavi, Philippe Malcolm
Walking Easier By Attaching A Spring-Mass To The Body: A Preliminary Simulation, Hiva Razavi, Philippe Malcolm
UNO Student Research and Creative Activity Fair
When carrying or pushing a load, more force is needed to accelerate and decelerate the additional mass, increasing Ground Reaction Force (GRF). However, this can be reduced by synchronizing the object's movement with the individual's Center of Mass (COM) using antiphase acceleration and deceleration. Past studies have shown this can decrease muscle work and metabolic costs. This study aimed to determine optimal spring parameters to minimize horizontal GRF (GRFh) when pushing a cart by connecting the human to the cart with a spring and damper system.
Three walking conditions were simulated in MATLAB: 1) Normal walking; 2) Walking with a …
Attenuated Skeletal Muscle Metabolism Explains Blunted Reactive Hyperemia After Prolonged Sitting, Cody Anderson, Elizabeth Pekas, Michael Allen, Song-Young Park
Attenuated Skeletal Muscle Metabolism Explains Blunted Reactive Hyperemia After Prolonged Sitting, Cody Anderson, Elizabeth Pekas, Michael Allen, Song-Young Park
UNO Student Research and Creative Activity Fair
Introduction: Although reduced post-occlusive reactive hyperemia (PORH) after prolonged sitting (PS) has been reported as impaired microvascular function, no specific mechanism(s) have been elucidated. One potential mechanism, independent of microvascular function, is that an altered muscle metabolic rate (MMR) may change the magnitude of PORH by modifying the oxygen deficit achieved during cuff-induced arterial occlusions. We speculated that if MMR changes during PS, this may invalidate current inferences about microvascular function during PS. Objective: Therefore, the objective of this study was to examine if peripheral leg MMR changes during PS and to ascertain whether the change in the oxygen deficit …
The Effect Of Exoskeleton Footwear On Joint Angular Motion During Walking In Patients With Peripheral Artery Disease, Zahra Salamifar, Farahnaz Fallahtafti, Iraklis I. Pipinos, Jason M. Johanning, Sara Myers
The Effect Of Exoskeleton Footwear On Joint Angular Motion During Walking In Patients With Peripheral Artery Disease, Zahra Salamifar, Farahnaz Fallahtafti, Iraklis I. Pipinos, Jason M. Johanning, Sara Myers
UNO Student Research and Creative Activity Fair
Gait, Lower Extremity, Peripheral Artery Disease, Joint Angle, Exoskeleton Footwear, Exoskeleton, Assistive Device, Walking.
The Effects Of Demographics And Risk Factors On The Morphological Characteristics Of Human Femoropopliteal Arteries, Sayed Ahmadreza Razian, Majid Jadidi, Alexey Kamenskiy
The Effects Of Demographics And Risk Factors On The Morphological Characteristics Of Human Femoropopliteal Arteries, Sayed Ahmadreza Razian, Majid Jadidi, Alexey Kamenskiy
UNO Student Research and Creative Activity Fair
Background: Disease of the lower extremity arteries (Peripheral Arterial Disease, PAD) is associated with high morbidity and mortality. During disease development, the arteries adapt by changing their diameter, wall thickness, and residual deformations, but the effects of demographics and risk factors on this process are not clear.
Methods: Superficial femoral arteries from 736 subjects (505 male, 231 female, 12 to 99 years old, average age 51±17.8 years) and the associated demographic and risk factor variables were used to construct machine learning (ML) regression models that predicted morphological characteristics (diameter, wall thickness, and longitudinal opening angle resulting from the …
Impact Forces And Patterns Of Axonal Injury Differ Between Two Models Of Tbi, Edward Lai, David M Devilbiss
Impact Forces And Patterns Of Axonal Injury Differ Between Two Models Of Tbi, Edward Lai, David M Devilbiss
Rowan-Virtua Research Day
Traumatic brain injury (TBI) affects approximately 3.8 million Americans a year and results in complex neuropathological and neurocognitive sequelae. Animal models of TBI attempt to replicate the impact forces and pathology of injury in humans. However, in these models, the forces generated at the time of impact are poorly understood. Nonetheless, a variety of shear and strain forces generated at the time of impact can produce diffuse axonal injury. Injury to axons and neurons across a variety of brain regions resulting from axonal injury underlies the cognitive and behavioral impairments observed after TBI. Three critical brain regions, the corpus callosum …
The Optimal Relationship Between Actuator Stiffness And Actuation Timing For A Passive Ankle Exoskeleton: An Opensim Simulation, Cody Anderson, Hafizur Rahman, Sara Myers
The Optimal Relationship Between Actuator Stiffness And Actuation Timing For A Passive Ankle Exoskeleton: An Opensim Simulation, Cody Anderson, Hafizur Rahman, Sara Myers
UNO Student Research and Creative Activity Fair
Introduction
The passive ankle exoskeleton developed by Collins et al. (2015) reduced the metabolic cost of walking with an actuation-timing of ~16% of stance [1]; however, other actuation timings have not been extensively investigated. Therefore, the purpose of this study was to determine the optimal relationship between actuator-stiffness and actuation-timing for a passive ankle exoskeleton by using musculoskeletal modeling.
Methods
Kinematics and ground reaction forces were recorded while a healthy-young male walked on overground force-plates, and these data were exported to a musculoskeletal modeling software (OpenSim) for simulation. A passive ankle exoskeleton model was designed and integrated with a default …
Ankle Foot Orthoses Improves Ground Reaction Forces In Patients With Peripheral Artery Disease, Zahra Salamifar, Farah Fallahtafti, Iraklis Pipinos, Jason Johanning, Hafizur Rahman, Mahdi Hassan, Sara Myers
Ankle Foot Orthoses Improves Ground Reaction Forces In Patients With Peripheral Artery Disease, Zahra Salamifar, Farah Fallahtafti, Iraklis Pipinos, Jason Johanning, Hafizur Rahman, Mahdi Hassan, Sara Myers
UNO Student Research and Creative Activity Fair
Peripheral artery disease (PAD) is caused by atherosclerotic blockage of the arteries in the legs. Globally, over 236 million people suffer from PAD. Intermittent claudication is the most common PAD symptom that includes muscle pain, cramping, and/or aching induced by physical activities and relieved with rest. PAD impacts gait patterns: specifically, rapid ankle plantar flexion after heel contact, which decreases optimal energy transfer. An ankle-foot orthosis (AFO) is an assistive device that improves gait in patients with neurological conditions. AFOs could help patients with PAD to improve walking kinetics. The purpose of this study was to determine the impact of …
Design And Development Of Software With A Graphical User Interface To Display And Convert Multiple Microscopic Histology Images, Sayed Ahmadreza Razian, Majid Jadidi, Alexey Kamenskiy
Design And Development Of Software With A Graphical User Interface To Display And Convert Multiple Microscopic Histology Images, Sayed Ahmadreza Razian, Majid Jadidi, Alexey Kamenskiy
UNO Student Research and Creative Activity Fair
Histological images are widely used to assess the microscopic anatomy of biological tissues. Recent advancements in image analysis allow the identification of structural features on histological sections that can help advance medical device development, brain and cancer research, drug discovery, vascular mechanobiology, and many other fields. Histological slide scanners create images in SVS and TIFF formats that were designed to archive image blocks and high-resolution textual information. Because these formats were primarily intended for storage, they are often not compatible with conventional image analysis software and require conversion before they can be used in research. We have developed a user-friendly …
Chair Rise Kinetics And Correlates Of Performance In Young And Older Males, Tyler Smith
Chair Rise Kinetics And Correlates Of Performance In Young And Older Males, Tyler Smith
Symposium of Student Scholars
Purpose: To compare chair rise kinetics in young (YM) and older (OM) males, and determine correlates of chair rise performance. METHODS: YM (n=15, age =20.7±2.2 yrs) and OM (n=15, age=71.6±3.9yrs) performed three trials of a single chair rise as quickly as possible on a force plate and the vertical ground reaction force (VGRF) signal was analyzed. Peak VGRF (PF), as well as peak (100 ms rolling average), early (minimum VGRF to 50% PF), late (50% PF to PF), and overall (minimum VGRF to PF) rate of force development (RFD; Δforce/Δtime) were calculated based on phases of the task. Power and …
Reliability And Validity Of The Onpoint System For Quantifying Performance Of The Star Excursion Balance Test, Adam Redgrift
Reliability And Validity Of The Onpoint System For Quantifying Performance Of The Star Excursion Balance Test, Adam Redgrift
Undergraduate Student Research Internships Conference
The Star Excursion Balance Test (SEBT) is a clinical method of assessing dynamic balance in healthy adults and athletes1. Furthermore, this functional test may be extended to the examination of lower extremity injury, such as ankle instability, in injured populations2. The ‘ONPoint System’ is a tool developed by Dr. Jacob Reeves, which attempts to reduce barriers for clinicians seeking to use the SEBT. Before widespread implementation, the ONPoint system must first be examined in terms of both its validity and reliability. To do this, measurements taken from the OnPoint mat were compared to data obtained from a pressure mapping device, …
The Effect Of Lumbar Support On Holding Shoulder Electromyography And Trunk Kinematics In Collegiate Violinists, Lauren Elizabeth Lee, Kevin Enstrom, Michael T. Soucy
The Effect Of Lumbar Support On Holding Shoulder Electromyography And Trunk Kinematics In Collegiate Violinists, Lauren Elizabeth Lee, Kevin Enstrom, Michael T. Soucy
Seaver College Research And Scholarly Achievement Symposium
Instrument-specific holding mechanics in violinists likely contribute to a high incidence of playing related musculoskeletal disorders (PRMDs). The inclusion of a lumbar support while playing may alleviate potential risks for PRMDs. PURPOSE: To investigate the effects of lumbar support on left holding shoulder musculature electromyography (EMG) activity and thigh, trunk, and hip kinematics. METHODS: Eleven (6 F; 5 M) collegiate musicians (19.5±1.3 years, 1.71±0.1 m, 68.1±7.7 kg, playing experience: 10.0±3.9 years, weekly playing time: 14.1±8.2 hours) gave voluntary informed consent and performed Prelude from Suite No. 1 in G Major (JS Bach, BWV 1007) with and without a lumbar support. …
Development Of A Modular Activity-Specific Upper Limb Prosthesis, Rahul Raj
Development Of A Modular Activity-Specific Upper Limb Prosthesis, Rahul Raj
UNO Student Research and Creative Activity Fair
The use of activity-specific upper-limb prosthesis helps children with upper-limb loss to engage in functional and recreational activities, such as music and sports. The purpose of this study was to develop a modular activity-specific prosthesis and develop a remote-fitting procedure. We evaluated patient satisfaction after using the device for 8 weeks and evaluated anthropometric and range of motion (ROM) measurements of the residual limb after use of the prosthesis. We enrolled 7 children with unilateral trans-radial amputations between 7 and 12 years of age. The modular activity- specific prosthesis was specifically designed for playing musical instruments and sports. A survey …
A Systematic Review: Long Range Correlations In Running Gait, Mr. Taylor Wilson
A Systematic Review: Long Range Correlations In Running Gait, Mr. Taylor Wilson
UNO Student Research and Creative Activity Fair
Long range correlations (LRCs) are apparent in human walking and running gait and are indicative of a healthy system. A systematic review (SR) was completed to determine the typical LRC patterns in running. 20 articles were included in the SR. LRCs in running gait tend to be similar to the LRCs in walking gait, with fatigue contributing to a negative effect on the LRCs.
This SR could have implications on training guidelines for coaches and physical therapy methods to increase the LRCs in running gait for healthier functioning. More research is needed to determine how LRCs depend on running surface …
Efficacy Of The Opensim Simulator As A Tool To Detect Changes In Gait: A Peripheral Artery Disease Model, Cody Anderson, Hafiz Rahman, Irakis Pipinos, Jason Johanning, Sara Myers
Efficacy Of The Opensim Simulator As A Tool To Detect Changes In Gait: A Peripheral Artery Disease Model, Cody Anderson, Hafiz Rahman, Irakis Pipinos, Jason Johanning, Sara Myers
UNO Student Research and Creative Activity Fair
INTRODUCTION
Peripheral Artery Disease (PAD) is characterized by atherosclerotic plaques in the leg arteries. A common treatment for PAD is supervised exercise training [1]. However, gait is not fully restored following supervised exercise training (SET). Musculoskeletal simulation may provide insight into how muscle activation changes following SET contributed to persistent gait alterations.
METHODS
Kinematic and kinetic data from overground walking of patients with PAD (n=12), before and after a 6-month exercise intervention, was used as input for musculoskeletal modeling (OpenSim). The subjects in our sample were subdivided based on the location of ischemic muscle pain, as reported on the San …
How Stair Negotiation Affects Knee Joint Contact Forces In Individuals Post-Total Knee Arthroplasty, Todd Leutzinger
How Stair Negotiation Affects Knee Joint Contact Forces In Individuals Post-Total Knee Arthroplasty, Todd Leutzinger
UNO Student Research and Creative Activity Fair
This study investigates how walking up and down stairs affects knee joint contact forces in individuals post-total knee arthroplasty compared to overground level walking and healthy controls.
Developing And Testing Of Low-Cost 3d Printed Prostheses To Restore And Improve Function Of Children With Congenital Or Traumatic Amputations, Rahul Raj, Christopher Copeland, Claudia Cortes Reyes, Kaitlin Fraser, David Salazar
Developing And Testing Of Low-Cost 3d Printed Prostheses To Restore And Improve Function Of Children With Congenital Or Traumatic Amputations, Rahul Raj, Christopher Copeland, Claudia Cortes Reyes, Kaitlin Fraser, David Salazar
UNO Student Research and Creative Activity Fair
The purpose of this investigation was to provide technical considerations and clinical evidence of the possible benefits and obstacles in the use of upper-limb 3D printed prostheses in paediatric populations. This information is crucial for clinicians interested in exploring the use of 3D printed prostheses for their patients. In the present study, children with congenital digit reductions (n=5); absent digits (one traumatic and four congenital) (n=5) and with upper-limb reductions (n=9). The perceived functionality of upper-limbs before the use of the prosthesis and after 4 months of use. In addition, gross dexterity, anthropometric measurements, active range of motion, and strength …
Determining The Optimal Tension For An Ankle-Foot Assistive Device, Cody Anderson
Determining The Optimal Tension For An Ankle-Foot Assistive Device, Cody Anderson
UNO Student Research and Creative Activity Fair
Introduction
Peripheral artery disease (PAD) is caused by atherosclerosis, a buildup of cholesterol and fatty acid deposits, which blocks blood flow to the arms, legs, and feet. Ankle assistive devices have recently been implemented in various clinical population to improve walking ability. Our group has developed an ankle assistive device to improve walking ability in patients with PAD. This study tested our newly developed assistive device with several tension assistance levels and their effect on metabolic cost.
Methodology
Ten healthy subjects were recruited for this study. A spring was attached to the posterior side of the device parallel to the …
The Effect Of Sensory Input On The Temporal Structure Of Center Of Pressure In Stroke Survivors, Samantha Chong
The Effect Of Sensory Input On The Temporal Structure Of Center Of Pressure In Stroke Survivors, Samantha Chong
UNO Student Research and Creative Activity Fair
Stroke is the leading cause of disability that affects 17 million people worldwide. Patients post-stroke suffer from maintaining balance because the brain may not be able to receive or process visual, vestibular and proprioceptive sensory information: all of which contribute towards maintaining stability. Information provided by vision is important for spatial orientation, as it develops an environmental perspective. Proprioception is detected through the stretching of tendons and surrounding tissue and is able to help the brain determine spatial location. The vestibular system provides a sense of balance detecting rotations and linear accelerations through the vestibulo-ocular reflex. The vestibular system is …
The Effects Of Caffeine Ingestion On The Hemostatic Response To Simulated Firefighting Activities, Sierra Wassell
The Effects Of Caffeine Ingestion On The Hemostatic Response To Simulated Firefighting Activities, Sierra Wassell
Showcase of Graduate Student Scholarship and Creative Activities
The leading cause of death among firefighters is sudden cardiac event, and it is acknowledged that most ischemic events are due to an occlusive thrombus formation. In addition, due to the demanding job requirements and shift work, firefighters are commonly known to overuse caffeine as an ergogenic aid. The purposes of this study were to examine the potential effects of caffeine on the hemostatic response to simulated firefighting activity.
Functional Movement Patterns And Perceived Mobility In Collegiate Lacrosse Athletes, Christopher J. Rosenborough
Functional Movement Patterns And Perceived Mobility In Collegiate Lacrosse Athletes, Christopher J. Rosenborough
Student Scholar Showcase
Context: The stress on the body from sport participation may play a role in an athlete’s ability to function throughout a season. The primary objective of this study was to examine the effects of a non-traditional lacrosse fall season on functional movement patterns for both males and females. Our second objective was to observe how collegiate lacrosse athletes perceived mobility.
Methods: Fifty males (age=19.38+1.24 years, height=182.63+6.16 cm, mass=82.37+8.46 kg) and 22 females (age=19.68+1.17 years, height=165.10+6.88 cm, mass=64.09+8.72 kg) who participated on National Collegiate Athletic Association Division III lacrosse teams volunteered to participate. Independent variable was time (pre, post). …
The Perception Of Head Impacts Sustained By Collegiate Baseball Catchers: A Pilot Study, Caleb Johnston
The Perception Of Head Impacts Sustained By Collegiate Baseball Catchers: A Pilot Study, Caleb Johnston
Student Scholar Showcase
Repetitive subconcussive head impacts have been studied in a variety of contact sports and have been found to impair performance in football, soccer, hockey, and lacrosse athletes. To our knowledge no one has investigated the frequency of head impacts in the sport of collegiate baseball. To date, athlete perceived number of head impacts and actual head impacts recorded during participation have not been compared. A sample of 3 baseball catchers from one National Collegiate Athletic Association (NCAA) Division III baseball team were studied.Our results indicated perceived game impacts did not differ from actual game impacts (t2=1.76, P=.23; …
The Effects Of Stiffness Of A Prosthetic Shock-Absorbing Pylon On Mechanical Work During Walking, Jenny Anne Maun
The Effects Of Stiffness Of A Prosthetic Shock-Absorbing Pylon On Mechanical Work During Walking, Jenny Anne Maun
UNO Student Research and Creative Activity Fair
Name: Jenny Anne Maun
Title: The effects of stiffness of a prosthetic shock-absorbing pylon on mechanical work during walking
Degree: Masters
Faculty Advisor: Kota Z. Takahashi, PhD
Co-authors: Steven A. Gard, PhD; Matthew J. Major, PhD
A prosthetic shock-absorbing pylon (SAP) is intended to attenuate impact forces, provide comfort, and reduce residual limb pain for prosthesis users. However, the effect of an SAP and its spring stiffness on the mechanical work done by the prosthetic limb during walking remains unclear. The purpose of this study: to investigate the effects of SAP spring stiffness and walking speed on the mechanical work …
How Prosthetic Ankle Stiffness & Load Carriage Affect Metabolic Energy Expenditure During Walking, Erica A. Hedrick, Philippe Malcolm, Jason M. Wilken, Kota Z. Takahashi
How Prosthetic Ankle Stiffness & Load Carriage Affect Metabolic Energy Expenditure During Walking, Erica A. Hedrick, Philippe Malcolm, Jason M. Wilken, Kota Z. Takahashi
UNO Student Research and Creative Activity Fair
The ankle structures play a key role in body support, forward propulsion and leg swing. One important property of the human ankle is its ‘quasi-stiffness’, or resistance to angular motion. The ankle joint stiffness can play a role in aiding the lower leg as its rocks over the foot. Human biological ankle stiffness changes in response to changes in the mechanical demands of walking (e.g. added load or changes in speed), using active muscle contractions. However, the role of ankle stiffness in regulating metabolic energy across walking conditions is unknown. Therefore, the purpose of this study is to determine how …