NTN1 and familial congenital mirror movements: In light of the reported CST and/or CC tract malformations in CMM patients11, and Rad51 responsiveness to Netrin-1, we examined further whether Rad51 is involved in axonal branching, filopodia growth, or axon morphology of neurons from motor cortex, and whether such activities might be functionally linked with Netrin-1-mediated axon development.