Cube Grab

The patient — standing or seated — works at a table with a grid of cells. One cell turns blue; the patient grasps the cube (hand tracking or controller), lifts it, and places it on the target. Covering at least 70% of the cell turns it green and brings the next target; otherwise the patient simply retries, with no penalty.

There is no rush and no timer here — time serves the healing. Seated mode is supported with adjustable table height, and the environment is deliberately calm so the focus stays on the movement itself.

The goal is rebuilding the hand's perceptual map: grasp formation, grip stability, depth perception and goal-directed reach across the table. The very movements behind lifting a cup, pressing a button or writing are practiced here, step by step.

1. Fine-motor weakness after stroke or hand surgery
2. Motor-planning deficits and hand-eye coordination
3. Restoring everyday confidence

Pick a level set, and during the preparation phase adjust the table height to the patient with the joystick (seated mode supported). Then start the exercise; each patient always resumes from the level they previously reached.

1. Grid size (3×3 to 7×7), the success threshold and the training hand are configurable.
2. The cube color and the environment mood can change mid-session.
3. For first sessions, start with a smaller grid and an easier threshold.

1. Placement success rate and target-coverage accuracy
2. Attempts per target until success
3. Time per placement (untimed, tracked for trends)
4. Successful actions and total score