I don't believe Darwin's tubercle is a muscle - it appears to be just variation in appearence (like connected ear lobes): https://en.wikipedia.org/wiki/Darwin%2

I don't believe Darwin's tubercle is a muscle - it appears to be just variation in appearence (like connected ear lobes): https://en.wikipedia.org/wiki/Darwin%27s_tubercle https://en.wikipedia.org/wiki/Darwin%27s_tubercle However, TIL about the Palmaris longus muscle which is absent in around 14% of people: https://en.wikipedia.org/wiki/Palmaris_longus_muscle https://en.wikipedia.org/wiki/Palmaris_longus_muscle