Ten years ago, biopsychologists from Bochum published a classic study by screening the entire scientific literature to run a cladographic analysis on the distribution of handedness in vertebrates. Back then, they could finally establish that asymmetries are not an exception but a widespread phenomenon. Now it was high time to catch up with insights from the last decade. For this, studies analyzing 172 different species were screened. Overall, 39.53% of species showed evidence for population-level asymmetries, 32.56% individual-level asymmetries, and only 27.91% showed no asymmetry. These findings not only reveal once more the widespread feature of vertebrate motor asymmetries but also identify crucial gaps for future investigations.

Ströckens F, Schwalvenberg M, El Basbasse Y, Amunts K, Güntürkün O, Ocklenburg S, Limb Preferences in Non-Human Vertebrates: A new Decade, Laterality, 2025, DOI10.1080/1357650X.2025.2499049.