Gait Rehabilitation Research Laboratory

We Are Engineering Therapy

Crean College Research Night

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Thank you to all at the Crean College Research Night for the great time! It was wonderful to meet and greet everyone who is passionate about science. Tonight was the first time Christopher Hoang and Michael Shiraishi unveiled their project… Continue Reading →

DPT Students – Stimuli that Affect Gait Parameters

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For these experiments, a biomechanics class of 20 DPT students volunteered to conduct their own tests on multiple factors that affect gait parameters such as stride length and sway. Dividing themselves into 3 groups of 10, the students used 3… Continue Reading →

BUILD Fellowship – Norah Nyangau

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Building Infrastructure Leading to Diversity (BUILD) grant is a research initiative by the National Institute of Health (NIH) awarded to 10 universities across the United States. This initiative aims to attract undergraduate students from diverse backgrounds and train them in… Continue Reading →

Welcome to our Summer 2019 Interns!

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Team: This year we have 5 interns joining us: Norah Nyangau, Samuel Chan, Nihar Nanjappa, Michael Shiraishi, Mckyla Grant-Beuttler. They bring various skills and interests to the lab. For example, Norah enjoys connecting with others and working in teams, Samuel… Continue Reading →

Engineering Therapy to assist Toe-Walkers

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Toe walking is a style of walking in which a child walks on the balls of his/her feet without heels touching the ground.  In our lab, we are designing an intervention technique that promotes plantar extension in children. In the… Continue Reading →

Building a Platform for the GRAIL

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Chris Hoang is a whiz at constructing things. He built this removable platform for our GRAIL system for an upcoming study (more on this soon). When designing the platform, Chris had to consider the multiple factors from material properties to… Continue Reading →

Video: Basic Introduction to Our Prototype Shoe Sensors

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This is a prototype shoe (v2) I helped design and build. It was designed for children suffering from habitual toe-walking, which can lead shortened Achilles tendon. Since the behavior is often due to an unconscious habit, it’s function make patient’s… Continue Reading →

Presenting our research | Crean College of Health and Behavioral Sciences

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Here is Henry Do (above) and Michael Pollind (above) presenting their research on the use of wearable sensors in fall risk assessment in older adults. Here is Sharon Kim presenting her work with machine learning/deep learning algorithms and idiopathic toe-walking in… Continue Reading →

Fall Risk Assessment in Stroke Patients

Here we have Christopher Hoang and Kenna Dougherty working with stroke patients in a study designed to accurately assess fall risk using functional analysis of gait and postural stability parameters. Our stroke patients are affected by varying degrees of hemiparesis,… Continue Reading →

Bed Sore Sensors: PCBs and Enclosures

I spent the week 3D printing these enclosures for the bed sensor electronics and LCD display. Sleeping in one position too long causes bedsores due to extended applied pressure on local vasculature. We hope this device can be developed to… Continue Reading →

Device for the Improvement of Neuronal Feedback: Sub-Threshold Tactors

This is a quick instructional video our research associate, Henry Do, made to help doctor of physical therapy (DPT) students learn about the device they’ll be using for data collection for their capstone studies. Good luck you guys!

Exploring Servo Motors for use in Rehab Engineering

Learning electronics is a test of patience. Plenty of reading and plenty of tinkering. Our team is constantly adding new technologies and skills to our tool belt. Here is a comedic video of our lab research associate, Henry Do, stumbling… Continue Reading →

Wearable Sensors-based Fall Risk Assessment in Older Adults

Christopher Hoang presents the research from “Gait Rehab Lab” at the Orange Research Expo for Undergraduates, Chapman University. The lab designs and fabricates the sensors and their housing, ranging from bed sore sensor applications to therapy shoes to correct idiopathic toe-walking… Continue Reading →

Fall Risk Assessment in the Elderly using GRAIL-based Sensory Perturbation

Harbir Bhatti presents his research involving Gait Real-Time Analysis Interactive Lab (GRAIL) and fall risk assessment in elderly people. Using sensory perturbations and gait parameters analysis, Harbir creates a model assessing fall risk.

Wearable Sensor-based Gait Classification in Idiopathic Toe Walking Adolescents

Here is Sharon Kim presenting her work with machine learning/deep learning algorithms and idiopathic toe-walking in adolescents. Sharon used these tools to classify toe-toe walking vs. heel-toe walking and build an accurate model.

Here’s my colleague Chris Hoang explaining how we start to approach biomechanical data processing! For more check out my Instagram: @henrydodesign

Hi Everyone, the Motion Capture Lab is where I do some of my research. My current interests centers around gait analysis and fall risk assessment. #biomechanics #motioncapture

Let’s Welcome Chris Hoang to the GRAIL Lab!

Chris Hoang is a wonderful new addition to our lab. His unique blend of skills from healthcare volunteering, CAD design, and mechanical aptitude will prove extremely useful for designing and constructing experimental devices for our lab.

Micro Logger V1.0 (ICM-20948)

Introduction The Micro Logger is a small wearable sensor that logs gyro and acceleration data directly to an SD card. This first design was kept very simple and the footprint was minimized down as much as possible. Going forward, there… Continue Reading →

Human Factors Engineering: Making Shoes for Data Collection that Integrate Fashion and Technology

Passion drives persistence! (1) Stochastic Resonance Wearable (2) Gait/Postural Stability Insole Sensor (3) Ideopathic Toe-Walk Rehabilitation Shoe View this post on Instagram Soldering is overrated. When fixing broken wire connections, the most time and effort efficient method is to through… Continue Reading →

Our Lab Prides Itself on Designing Original Circuits and Software for Our Motion Sensors

This is the smallest motion sensor our lab has achieved. We’ve swapped out our prototyping parts for smaller high-end components and shrank the board to the size of a penny. We’ve improved power efficiency by including idle period protocols in… Continue Reading →

Bed Sensor Enclosure Design

Motion Sensor Prototype (coin size)- Acryllic Glass cover to enable visual feedback capacity, battery and SD card ports, and chamfered corners to improve comfort from wearing. #fusion360 #pcbenclosure  Motion Sensor Enclosure developed using parametric modeling. I am not a big fan of… Continue Reading →

Biomechanics is Interdisciplinary and All Our Projects are Thanks to Our Wide-Skill Sets

This is the smallest motion sensor our lab has achieved. We’ve swapped out our prototyping parts for smaller high-end components and shrank the board to the size of a penny. We’ve improved power efficiency by including idle period protocols in… Continue Reading →

Developing a Mobile App to Improve Data Collection Efficiency from Arduino-Based Accelerometers

  I’m taking a mobile app development course online and made this prototype app. I’m just working on the user interface and visual display, but I made this barebones prototype to illustrate its core function: data collection. I want to… Continue Reading →

Our Lab’s New Driving Simulator Will Bring Fresh Projects to Rehabilitate Our Stroke Patients

We’re getting trained right now on a new driving simulator. We’re going to use it for driving and neurorehabilitstion research on stroke patients. Lots of kinematic data processing in Matlab awaits in the future. Love my field.

Sneak Peak: Our Lab is Currently Learning to Develop Interactive Environment with UNITY3D

Happy Halloween! View this post on Instagram Happy Halloween! #unity3d A post shared by Henry Do (@henrydo3000) on Oct 31, 2018 at 9:53pm PDT

Determining Proper Gait Parameters to Predict Marker Events on Forward and Backward Walking

Worked until 11pm figuring out the proper gait parameters and kinematic variables to characterize toe/heel strikes within our marker data View this post on Instagram Worked until 11pm figuring out the proper gait parameters and kinematic variables to characterize toe/heel… Continue Reading →

Analyzing Marker Data in Forward and Backward Walking (with sound effects)

View this post on Instagram A post shared by Henry Do (@henrydo3000) on Nov 16, 2018 at 12:42pm PST

Ardunio and Scons

The Arduino IDE is a really good starting environment but I was looking for something a bit more flexible. Atmel studio is built for AVR chips but the environment obscures a lot of the process and adding an Ardunio library… Continue Reading →

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