The deep trabecular structure of first metacarpals in extant hominids.
Christopher J DunmoreSebastian BachmannAlexander SynekDieter H PahrMatthew M SkinnerTracy L KivellPublished in: American journal of biological anthropology (2023)
These results are consistent with differences in observed thumb use in these species and may also reflect systemic differences in bone volume fraction. The trabecular bone extension into the medullary cavity and concentrations beneath the disto-radial flange may represent crucial biomechanical signals that will aid in the inference of fossil hominin thumb use.