Wang Y, Chen Y, Chen L, Herron BJ, Chen XYang, Wolpaw JR. Motor learning changes the axon initial segment of the spinal motoneuron. J Physiol. 2024;602(9):2107-2126. 

Schalk G, Carp JS, Wolpaw J. Temporal transformation of multiunit activity improves identification of single motor units. J Neurosci Methods [Internet]. 2002;114(1):87-98. http://www.ncbi.nlm.nih.gov/pubmed/11850043