Quick Overview
Canadian scientists at Toronto Rehabilitation Institute and the University of Toronto tested therapist-guided functional electrical stimulation, a task-based form of EMS, after severe stroke.
In a randomised trial, people two to seven weeks post-stroke trained reaching and grasping for 12–16 weeks.
The FES group gained more on object manipulation, grip torque, pinch force, the Barthel Index, Fugl-Meyer arm scores and Chedoke-McMaster stages than usual therapy alone. A related figure showed larger FIM self-care gains after about 40 hours.
The 2020 methods paper in Swiss-published Frontiers in Neuroscience sits on ethics-approved hospital trials. Those measured gaps suggest structured EMS practice can support arm recovery.
Read the full post for dose, tasks and the original study link.
We always provide direct links to the original research at the end of every article so you can review the evidence yourself.
Toronto Scientists Measured Real Arm Gains After Stroke With Guided Electrical Stimulation
Picture a cup on a table.
After a severe stroke, that cup can feel a world away.
The arm hangs.
The hand will not open.
Even a simple reach can fail.
A Canadian research team spent years asking a hopeful question.
Could carefully timed electrical muscle stimulation, used as functional electrical stimulation, help people practise reaching and grasping again?
They published the methods and trial results in 2020.
The paper appeared in Frontiers in Neuroscience, a peer-reviewed journal from Lausanne, Switzerland.
The work came from the KITE Research Institute at Toronto Rehabilitation Institute, part of University Health Network, with the University of Toronto.
Lead authors were Naaz Kapadia, Bastien Moineau, and Milos R. Popovic.
Hospital ethics boards approved the studies.
Patients gave written consent.
That is why this story rests on published science, not rumour.
What the team actually did
This was not a gadget waved over the skin.
Therapists placed surface electrodes on the shoulder, arm, and hand.
A multi-channel stimulator then produced short pulses.
Typical settings were 40 Hz, about 250 microseconds, and 15 to 30 mA.
Sessions lasted 45 to 60 minutes.
Patients trained three to five days a week for eight to 16 weeks.
Many completed about 40 hours.
The key rule was simple.
The person had to try the movement first.
Stimulation then helped the arm follow a natural pattern.
Tasks included lifting a mug, holding a pen, and opening the hand around an object.
As voluntary strength returned, stimulation was turned down.
Channels moved to weaker muscles.
That is how the lab used EMS as a training partner, not a magic switch.
What they measured after stroke
One randomised trial enrolled 21 people with acute, severe hemiplegia.
They were only two to seven weeks after stroke.
Arm and hand scores started very low.
Chedoke-McMaster arm and hand stages were no higher than 2.
Fugl-Meyer upper-limb scores were under 15.
One group received FES plus usual physiotherapy and occupational therapy.
The other group received the same usual therapy alone.
Training ran five days a week for 12 to 16 weeks.
The FES group improved more on several scored tests.
Gains were larger for object manipulation.
Palmar grip torque rose more.
Pinch-grip pulling force rose more.
Barthel Index scores, which track daily independence, improved more.
Upper-extremity Fugl-Meyer scores improved more.
Chedoke-McMaster motor stages improved more.
Those differences reached statistical significance.
The same laboratory later described FIM self-care scores in severe sub-acute stroke.
People who completed the FES programme showed larger self-care gains than people who received conventional therapy only.
Some needed less help with everyday tasks.
A small paediatric study added another bright data point.
Four children with severe, chronic stroke completed 48 hours of the same style of therapy.
Average object-manipulation scores rose by 14.5 points.
That change was statistically significant.
Grasp scores on the Quality of Upper Extremity Skills Test rose by about 26 points.
Every child improved on the tests used.
Across the Toronto programme, the authors reported work with about 50 stroke patients and about 150 spinal cord injury patients.
They wrote that short courses of this therapy, paired with standard rehab, were linked with better arm and hand use.
Some people became less dependent on carers.
Related numbers from the same method
The group also ran a randomised trial in incomplete cervical spinal cord injury.
After 40 hours, mean FIM self-care change was 20.1 with FES plus therapy.
It was 10 with conventional therapy alone.
The difference was statistically significant.
Those extra independence points matter when dressing, eating, and washing are the goal.
The lesson they drew was consistent.
More structured practice hours, with the person actively trying, tracked with bigger measured gains.
They favoured at least 20 sessions.
They often aimed for 40 hours or more when the person could tolerate it.
They did not pile two exhausting sessions into one day.
They spread the work across weeks.
Why the source is solid
University Health Network is one of Canada’s major teaching-hospital networks.
University of Toronto is a leading research university.
Frontiers in Neuroscience is an open-access, peer-reviewed journal published in Switzerland, a country with a long scientific tradition.
The 2020 paper sits on earlier randomised trials from 2008, 2011, and 2014.
Readers can look up the scores.
That paper trail is what makes this write-up legitimate.
The hopeful part, said carefully
This research does not claim that EMS cures stroke.
It does not replace a doctor, a therapist, or hospital rehab.
Not every person improved by the same amount.
In one chronic stroke group, changes were smaller and not statistically significant.
Still, the bright finding is clear.
In supervised trials, people with very weak arms practised real tasks with guided electrical muscle stimulation.
On standard tests of reaching, grasping, grip force, and daily self-care, many recorded larger gains than matched therapy without that stimulation.
The more complete programmes, around 40 hours over weeks, were the ones tied to those stronger numbers.
If you or someone you love is recovering after stroke, take this paper to a qualified clinician.
Ask whether a regulated, therapist-led FES programme is appropriate.
Research like this is how hope earns its evidence.
This article summarises published research. It is not medical advice and does not promote a product as a treatment.
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Research Summary
| Detail | What the paper reports |
|---|---|
| Original study | Open-access article in Frontiers in Neuroscience, volume 14, article 718. Full text: https://doi.org/10.3389/fnins.2020.00718 |
| Title | Functional Electrical Stimulation Therapy for Retraining Reaching and Grasping After Spinal Cord Injury and Stroke |
| Authors | Naaz Kapadia, Bastien Moineau and Milos R. Popovic |
| Where it was done | KITE Research Institute, Toronto Rehabilitation Institute–University Health Network, and University of Toronto, Canada |
| Publisher and date | Frontiers Media, Lausanne, Switzerland. Received 23 January 2020. Accepted 16 June 2020. Published 9 July 2020 |
| Purpose | Describe how multi-channel surface FES was used in clinic trials to retrain arm and hand function, and summarise measured gains versus conventional therapy |
| Who was treated | About 50 people after stroke and about 150 people with spinal cord injury in the authors’ lab; more than 200 patients in total over 15-plus years |
| Stroke group in the key trial | Acute severe hemiplegia, 2–7 weeks after stroke. Chedoke-McMaster arm and hand stage no higher than 2. Fugl-Meyer upper-limb score under 15 |
| How FES was used | Surface electrodes. Patient tries the movement first. Stimulation then assists a functional task such as opening the hand, lifting a mug or holding a pen. Stimulation is reduced as voluntary control returns |
| Stimulation settings | Balanced biphasic pulses. Frequency 40 Hz. Pulse width about 250 µs. Amplitude 8–50 mA, typically 15–30 mA. Sessions described as having little to virtually no pain |
| Session dose | 45–60 minutes. Three to five days a week. Eight to 16 weeks. About 40 sessions. Active stimulation often 30–40 minutes inside the hour |
| Stroke findings they report | In the randomised acute stroke trial, the FES group improved more than conventional therapy on object manipulation, palmar grip torque, pinch-grip force, Barthel Index, Fugl-Meyer upper extremity and Chedoke-McMaster stages |
| Related independence scores | The paper’s stroke figure and text report larger FIM self-care gains after about 40 hours of FES plus therapy than after the same hours of usual physiotherapy and occupational therapy |
| Paediatric stroke add-on | Four children with severe chronic stroke completed 48 hours of FES. Mean object-manipulation score rose 14.5 points. QUEST grasp rose about 25.9 points. All four improved on the tests used |
| Spinal cord injury comparison from the same method | In subacute incomplete C3–C7 injury, mean FIM self-care change was 20.1 after 40 hours of FES plus therapy versus 10 after conventional therapy alone (P = 0.015) |
| Tasks that could be trained | Palmar grasp, lateral grasp, tripod grip, two-finger pinch, lateral pinch, lumbrical grip, sideways reach, forward reach, hand to mouth, and reach-plus-grasp combinations |
| What therapists tracked | Stroke: Action Research Arm Test and Fugl-Meyer upper extremity. Spinal cord injury: GRASSP, Toronto Rehabilitation Institute Hand Function Test, and SCIM self-care |
| Limits stated by the authors | Muscles must be reachable with surface electrodes. Major lower-motor-neuron damage can block FES. The person must be able to follow instructions. Contraindications include a pacemaker, metal at the site, open skin, or uncontrolled autonomic dysreflexia |
| Funding and ethics | Funded by the Christopher & Dana Reeve Foundation, Spinal Cord Injury Ontario, Rick Hansen Institute, PSI Foundation, Ontario Neurotrauma Foundation and Toronto Rehab Foundation. Approved by the Toronto Rehabilitation Institute–UHN research ethics board. Written consent obtained |
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