The broad, long-term, scientific objective of this project is to identify the behavioral and neural factors that determine the efficacy of robotic hand movement training after stroke. An important societal impact of achieving this objective will be the design of more effective robotic rehabilitation exercise technology, which will allow people with a stroke to increase their movement recovery beyond that possible with current approaches. In our previous grant, we found that participants with impaired finger proprioception (quantified robotically with a novel protocol) did not achieve a functional benefit from robotic finger training. Reduced benefit also correlated with injury to and abnormal activation of the somatosensory system. Our working hypothesis is that finger proprioceptive integrity is a gateway for robotic assistance because it allows such assistance to stimulate a Hebbian-like learning mechanism. Building on this ?Hebbian Hypothesis?, we add two other hypotheses: improving proprioceptive capacity with targeted training for those with impaired proprioception will enhance the effectiveness of subsequent robotic finger training, and proprioceptive integrity modulates spontaneous self- training outside of formal training. We will test these hypotheses in a series of experiments with a novel robotic finger training device (?FINGER?) that assists participants in making different grips to play notes in a musical computer game similar to Guitar Hero. We will recruit participants with hand movement deficits at least six months after stroke and randomize the participants with intact finger proprioception to participate in Aim 1, and those with impaired finger proprioception to participate in Aim 2.
Aim 1 is to identify the magnitude of the Hebbian benefit from robot-assisted movement training. Robotic assistance enhances proprioceptive input, but it typically also enhances reward, because it increases task success. We will determine the magnitude of the benefit of the enhanced proprioceptive input, beyond the benefit due to enhanced reward.
Aim 2 is to determine the extent to which finger proprioception can be improved through targeted robotic proprioceptive training, and thereby enhance response to subsequent robotic finger movement training.
Aim 3 is to identify mathematical models that predict the response to the different forms of training experienced by the participants in Aim 1 and 2. The model inputs will be baseline behavioral and demographic measures, lesion overlap with sensory and motor structures (via anatomical MRI), and activation of sensory-motor networks (via fMRI and EEG).
We aim to provide further insight into the high variance in robotic training response, and determine who responds best to proprioceptive training.
Aim 4 is to identify the role of impaired proprioception in decreasing spontaneous hand use in daily life using a novel wearable sensor, because hand use outside of robotic therapy sessions likely exerts a powerful training effect. Testing of these hypotheses will provide insight into how to manipulate the unique resources for sensory motor plasticity that each patient retains using robot-based movement training.

Public Health Relevance

This project will determine how to improve hand movement recovery after stroke, providing people with stroke new ways to access effective, semi-autonomous rehabilitation training using robotic devices. It will also identify people with stroke who are most likely to benefit from robot-assisted movement training.

National Institute of Health (NIH)
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Research Project (R01)
Project #
Application #
Study Section
Musculoskeletal Rehabilitation Sciences Study Section (MRS)
Program Officer
Quatrano, Louis A
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
University of California Irvine
Engineering (All Types)
Biomed Engr/Col Engr/Engr Sta
United States
Zip Code
Wolbrecht, Eric T; Rowe, Justin B; Chan, Vicky et al. (2018) Finger strength, individuation, and their interaction: Relationship to hand function and corticospinal tract injury after stroke. Clin Neurophysiol 129:797-808
Rowe, Justin B; Chan, Vicky; Ingemanson, Morgan L et al. (2017) Robotic Assistance for Training Finger Movement Using a Hebbian Model: A Randomized Controlled Trial. Neurorehabil Neural Repair 31:769-780
Taheri, Hossein; Goodwin, Stephen A; Tigue, James A et al. (2016) Design and optimization of PARTNER: a parallel actuated robotic trainer for NEuroRehabilitation. Conf Proc IEEE Eng Med Biol Soc 2016:2128-2132
Reinkensmeyer, David J; Burdet, Etienne; Casadio, Maura et al. (2016) Computational neurorehabilitation: modeling plasticity and learning to predict recovery. J Neuroeng Rehabil 13:42
Taheri, Hossein; Reinkensmeyer, David J; Wolbrecht, Eric T (2016) Model-based assistance-as-needed for robotic movement therapy after stroke. Conf Proc IEEE Eng Med Biol Soc 2016:2124-2127
Ingemanson, Morgan L; Rowe, Justin B; Chan, Vicky et al. (2016) Use of a robotic device to measure age-related decline in finger proprioception. Exp Brain Res 234:83-93
Norman, Sumner; Dennison, Mark; Wolbrecht, Eric et al. (2016) Movement Anticipation and EEG: Implications for BCI-Contingent Robot Therapy. IEEE Trans Neural Syst Rehabil Eng 24:911-919
Wolbrecht, Eric T; Morse, Kyle J; Perry, Joel C et al. (2016) Design of a thumb module for the FINGER rehabilitation robot. Conf Proc IEEE Eng Med Biol Soc 2016:582-585
Zondervan, Daniel K; Augsburger, Renee; Bodenhoefer, Barbara et al. (2015) Machine-Based, Self-guided Home Therapy for Individuals With Severe Arm Impairment After Stroke: A Randomized Controlled Trial. Neurorehabil Neural Repair 29:395-406
Zondervan, Daniel K; Duarte, Jaime E; Rowe, Justin B et al. (2014) Time flies when you are in a groove: using entrainment to mechanical resonance to teach a desired movement distorts the perception of the movement's timing. Exp Brain Res 232:1057-70

Showing the most recent 10 out of 26 publications