Six Fingers Per Hand (IMAGE) University of Freiburg Caption Congenital six-fingered hand with additional muscles to move the extra finger which yield augmented manipulation abilities. The muscles controlling the additional finger (in green) are distinct from the thumb muscles (in red). Credit Source: compare „Original Publication", license: Creative Commons, https://creativecommons.org/licenses/by/4.0 Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.