Handedness may be related to variations in palmar arterial arches in humans.

@article{Sarkar2012HandednessMB,
  title={Handedness may be related to variations in palmar arterial arches in humans.},
  author={Aniruddha Sinha Sarkar and Sumita Dutta and Kana Bal and Jayanta Kumar Biswas},
  journal={Singapore medical journal},
  year={2012},
  volume={53 6},
  pages={409-12}
}
INTRODUCTION The superficial and deep palmar arterial arches are the main sources of blood supply to all structures in the human hand, and variations in these arterial arches are quite common. Although several studies have reported diameters and variations of these arches, to the authors' knowledge, no study has correlated such changes to handedness in adults. It is likely that dominance may play a role in arterial variations, such as those seen in the diameter or number of arteries formed in… CONTINUE READING