motor neuron, T1 leg motor neuron, leg motor neuron, Azevedo Lesser Mark Phelps et al. 2022, left soma, L1 bundle, soma in T1, primary class, leg motor neuron, motor neuron, publication, soma side, T1 leg motor neuron, soma segment, left T1 leg nerve, L1_T1L, main_tibia_flexor_in_femur_0, T1_L_MN, main_tibia_flexor_in_femur_0, T1L, MN