Evolutionary expansion of the corticospinal system is linked to dexterity in Peromyscus mice
Kelsey M. Tyssowski, Jeremy D. Cohen, Jian‐Zhong Guo, Phoebe R. Richardson, Karen E Cortina, Isobel H. Smith, Deshawn C Eijogu, Adam W. Hantman, Hopi E. Hoekstra
This study shows that forest mice have larger corticospinal tracts and greater dexterity compared to prairie mice, supporting the hypothesis that CSN number expansion enhances motor skills.
bioRxiv · Oct 16, 2025 · PreprintNeuroscience