Numerous everyday activities require a well-developed visual perception – i.e. the ability to take in and filter optical information through our optical apparatus, to pass it on to the brain in a stable manner and to enable the “recognition” of spatial objects by means of initial processing steps – a well-trained spatial cognition – i.e. the ability to process spatial objects purely mentally and to imagine them in scenes from other perspectives – and a well-tuned motor apparatus that enables us to implement mentally planned movements and sequences of movements in real life and thus, for example, to make concrete drawings and constructions or to write or to hammer a nail into a wooden board. This enables us, for example, to make concrete drawings and constructions, to write, or to hammer a nail into a wooden board. The basic routine of (fine) motor skills, which shows an affinity to the so-called eye-hand coordination (Frostig, 1972, 1979), therefore reflects the ability of humans to match optical and motor stimuli (here especially fine motor stimuli) and thus the ability to follow certain optical information with suitable real movements (e.g., to trace trajectories with a pencil, to draw on both sides and to move real objects to certain positions).