Condition category
Circulatory System
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims.
More than half of people surviving after stroke suffer from impaired motor function in the arm. The affected limb typically is weak, slow, lacks coordination and has difficulty with movements, and spasticity (tightness of muscle) may be present. Mirror therapy is an example of a treatment for improving movement of the affected arm after stroke. The mirror reflection creates the illusion that the affected side moves as normal. The effects of mirror therapy are due to the activation of mirror neurons (nerve cells) in the brain. Mirror neurons activate during both action execution and action observation (AO) of corresponding movements. Therefore, the beneficial effects of mirror therapy may, at least partly, be explained by similar working mechanisms as in action observation. This study aims to look at whether a mirror therapy-based AO protocol improves movement in 6 months or more after stroke by studying a simple upper-arm motor task.

Who can participate?
Patients who were affected by stroke at least 6 months ago with difficulty in moving their affected arm.

What does the study involve?
First, the ability to move the upper limb will be assessed in all participants. Hereafter, participants will be randomly allocated to one of two conditions - Action Observation (AO) or Control Observation (CO). Participants will train a simple upper-arm reaching task by performing 7 sets of 10 reaching movements alternated with periods of observation (AO or CO). Measurements are not invasive to the participants and take place on one single day. Measurements will take about 90 minutes.

What are the possible benefits and risks of participating?
Our participants will possibly improve the performance of the simple upper-arm reaching task.
The limited duration and type of motor task that was selected for the study will make overuse injuries very unlikely.

Where is the study run from?
The study is run from Erasmus MC, Dept. Rehabilitation Medicine in collaboration with Rijndan Rehabilitation Center, Netherlands.

When is the study starting and how long is it expected to run for?
Recruitment started in October 2012 and ended in June 2013.

Who is funding the study?
Adriaan Children's Foundation (KinderFonds Adriaanstichting), Netherlands.

Who is the main contact?
Mr Wouter Harmsen

Trial website

Contact information



Primary contact

Mr Hans Bussmann


Contact details

Postbus 2040
3000 CA

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

The effects of a mirror therapy based action observation protocol to improve motor learning of the affected upper arm in patients in the chronic stage after stroke: a randomized controlled experiment


Study hypothesis

Whether the beneficial effects of mirror therapy on motor learning after stroke could be explained by similar working mechanisms as in action observation.

Ethics approval

Medical ethical board Erasmus MC, 08/07/2010, ref. mec 2010-192

Study design

Randomized controlled experiment

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Upper limb motor problems after stroke


Participants were randomly allocated to the action observation (AO) or control observation (CO) group. To minimize possible confounding effects of age and motor ability, participants were stratified into four groups based on age (younger than 55 years of age or 55 years and older) and motor function (assessed with the Fugle Meyers Assessment (FMA), FMA score < 50 or a FMA score > 50). The randomization procedure was concealed; participants had to pick a sealed envelope before training. Participants had to train a simple upper limb reaching movement. The training contained 7 sets of 10 affected arm reaching movements, alternated with periods of observation (AO or CO).

Participants enrolled to the AO group observed video tapes with upper-arm reaching movements that were offered in such a way the AO is almost similar to the mirror reflection during mirror therapy. To provide participant-specific videos, reaching movements from the non-affected arm were video-taped and mirrored to create maximal postural familiarity and the illusion that the affected arm performed the reaching movements in a normal movement pattern.

Participants enrolled into the control observation (CO) group will observe a slideshow with static photographs of landscapes as control stimuli. The photographs contained no images of humans or animals and are selected not to trigger the mirror neuron system and therefore not likely to interfere with the goal in this study.

Intervention type



Not Applicable

Drug names

Primary outcome measures

The beneficial effects of AO will be assessed by analysing the performance of the simple upper arm reaching task. Primary outcome measure is movement time (s) of the reaching task

As this study is an experimental study, patients only train for 30-45 minutes, so outcome will be measured before the start of the single training session (baseline) and after training (follow-up).

Secondary outcome measures

No secondary outcome parameters

Overall trial start date


Overall trial end date


Reason abandoned


Participant inclusion criteria

1. At least 6 months after stroke
2. Brunnstrom score for upper-extremity function between III and VI
3. Home dwelling status

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Participants with neglect (indicated by the star cancellation test and/or reported by the occupational therapist or psychologist),
2. Co-morbidities that influence voluntary upper-extremity function
3. Participants who suffered from multiple strokes

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

Postbus 2040
3000 CA

Sponsor information


Erasmus Medical Center (Netherlands)

Sponsor details

P.O. Box 2040
3000 CA

Sponsor type

Hospital/treatment centre



Funder type


Funder name

Adriaan Children's Foundation (KinderFonds Adriaanstichting) (Netherlands) grant number 2010/0098

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

2015 results in:

Publication citations

Additional files

Editorial Notes

22/03/2016: Publication reference added.