Select Publications

A representative list of publications.

Rehabilitation Technology

Distance-Induced Changes in Walking Speed After Stroke: Relationship to Community Walking Activity
Journal of Neurological Physical Therapy (see pdf or link)
This study shows that co-assessment of distance-induced changes in walking speed during the 6-Minute Walk Test and the total distance walked substantially improves the prediction of real-world walking activity after stroke.

A Soft Robotic Exosuit Improves Walking in Patients after Stroke
Science Translational Medicine. (see pdf or link)
Soft robotic exosuits can function in synchrony with the paretic limb of persons after stroke to restore more healthy walking behavior.

Reducing Circumduction and Hip Hiking During Hemiparetic Walking through Targeted Assistance of the Paretic Limb using a Soft Robotic Exosuit
American Journal of Physical Medicine and Rehabilitation. (see pdf or link)
Soft robotic exosuits can provide targeted gait assistance in a manner that reduces common gait compensations adopted by persons poststroke in the face of impaired neuromotor control.

Soft Exosuit for Patients with Stroke: Feasibility Study with a Mobile Off-Board Actuation Unit
Rehabilitation Robotics (ICORR), 2015 IEEE Conference. (see pdf)
This paper describes the design of soft exosuit for use in persons poststroke, a research-focused mobile actuation unit capable of testing the exosuit in a variety of walking conditions, a real-time gait detection and control algorithm, and proof-of-principle data validating the use of the exosuit in the chronic stroke population.

Wearable Movement Sensors for Rehabilitation: A Focused Review of Technological & Clinical Advances  
Physical Medicine & Rehabilitation. (see pdf or link)
Portable, low-cost, and wearable sensors can be used to monitor the mobility of patients where they live and work.

Targeted Locomotor Training

Reducing the Cost of Transport and Increasing Walking Distance After Stroke: a Randomized Controlled Trial on Fast Training Combined with Functional Electrical Stimulation
Neurorehabilitation and Neural Repair. (see pdf or link)
This paper demonstrates that the novel combination of fast locomotor training with functional electrical stimulation (FastFES) to paretic ankle musculature is an effective rehabilitation approach for reducing the energy cost of poststroke walking.

Targeting Paretic Propulsion to Improve Poststroke Walking Function: a Preliminary Study
Archives of Physical Medicine and Rehabilitation. (see pdf or link)
A novel, hypothesis-driven locomotor intervention designed to treat poststroke walking dysfunction by targeting deficits in the propulsive-force generating ability of the paretic limb during walking was shown to be feasible and safe in persons with chronic stroke.

Identifying Candidates for Targeted Gait Rehabilitation after Stroke: Better Prediction Through Biomechanics-Informed Characterization
Journal of NeuroEngineering and Rehabilitation. (see pdf or link)
Although walking speed is a robust and clinically meaningful metric that is commonly used to stratify participants in intervention studies, the heterogeneity of motor impairment underlying similar poststroke walking speeds appears to reduce the utility of using walking speed to identify the appropriate candidates for a targeted gait intervention. 

Biomechanical and Clinical Research

Dynamic Structure of Lower Limb Joint Angles during Walking Post-stroke
Journal of Biomechanics. (see pdf or link)
Variability in joint kinematics is necessary for adaptability and response to everyday perturbations; however, intrinsic neuromotor changes secondary to stroke often cause abnormal movement patterns. How these abnormal movement patterns relate to joint kinematic variability and its influence on post-stroke walking impairments is not well understood.

Biomechanical Mechanisms Underlying Exosuit-induced Improvements in Walking Economy after Stroke
Journal of Experimental Biology. 
(see pdf or link)
Soft robotic exosuits designed to assist the paretic limb during walking can induce more symmetrical body center of mass power generation by the paretic and nonparetic limbs and reduce metabolic power consumption during hemiparetic walking.

Paretic Propulsion and Trailing Limb Angle Determine Long-Distance Walking Function after Stroke
Neurorehabilitation and Neural Repair. (see pdf or link)
This paper shows that the ability to generate propulsive force with the paretic limb during walking is a major determinant of how far individuals in the chronic phase of stroke recovery can walk.

Walking Speed and Step Length Asymmetry Modify the Energy Cost of Walking after Stroke
Neurorehabilitation and Neural Repair. (see pdf or link)
Extending previous work demonstrating that faster walking reduces the energy cost of walking after stroke, this paper suggests that walking faster after gait rehabilitation may not be energetically advantageous if individuals’ gait is not also more symmetric.

Do Improvements in Balance Relate to Improvements in Long-Distance Walking Function after Stroke?
Stroke Research and Treatment. (see pdf or link)
Despite being predictive of how far individuals poststroke can walk, changes in balance following gait intervention may not be necessary to improve long-distance walking ability in community-dwelling individuals poststroke.

Maximum Walking Speed is a Key Determinant of Long-Distance Walking Function after Stroke
Topics in Stroke Rehabilitation. (see pdf or link)
Independent of balance confidence, walking balance abilities, standing balance abilities, or lower extremity motor function, the short-distance maximum walking speed of persons poststroke predicts their long-distance walking ability.

Effects of Repeated Treadmill Testing and Electrical Stimulation on Poststroke Gait Kinematics
Gait and Posture. (see pdf or link)
This paper demonstrates that a learning effect is not present in individuals poststroke across testing sessions involving treadmill walking with and without functional electrical stimulation to the ankle musculature. A single testing session appears to be sufficient to measure baseline gait kinematics.