The intervention group trained bimanual coordination once a day for about 31 minutes on a total of ten days using a tablet game. A ball is to be moved on a circular line.

The patients in the control group receive an ergotherapeutic therapy unit once a day for the same length of time (approx. 31 minutes) for a total of ten days, in which they train unilaterally. In this therapy unit, the control group uses the "Aximo". This is a comb stand and so-called "rolls" with which plugging tasks can be practiced. The patients should push the rolls into the stand fields with the affected hand. With the plug-in game, the patients can complete different tasks that challenge and train their hand-eye coordination, their fine motor skills and their ability to grasp things (e.g. following a specific pattern based on a template or putting colors in a specific order).

Each task is performed for one minute, followed by a 2-minute break. After the task has been performed three times, there is a 5-minute break. The training block is then carried out twice more. This means that three "blocks" are carried out for each therapy unit.

measured by the difference in moving wooden cubes in the Box-and-Block Test (BBT) The BBT measures unilateral gross manual dexterity. The patient has to move as many individual cubes as possible from one side of the box over a partition to the other within one minute. The test takes place in a seated position and is performed sequentially with the non-impaired hand and the affected hand. The number of cubes transported for each side is evaluated.

measured by the difference in moving wooden cubes in the modified Box-and-Block Test (mBBT) For this, a modified box with three compartments and two partitions is used. The task is to take a cube in one hand, pass it to the other hand over the first partition and then transport it over the second partition to the outer compartment. The dice are then counted in the outer compartment. The dice that fall from one hand to the other in the middle compartment are counted separately. The task is performed twice, starting with the unimpaired hand in the first run and with the impaired hand in the second run. The subject has one minute per round to transport as many cubes as possible to the outer compartment.

measured by the difference in activity index (calculated from acceleration, movement amplitude and movement frequency during the use of the tablet game)

measured by the difference of National Institutes of Health Stroke Scale (NIHSS)

measured by differences between resting state functional magnetic resonance imaging (fMRI) scans