Postnatal development of somatosensory corticospinal projections in the mouse lumbar spinal cord
This study utilizes retrograde and anterograde tracing in mice to map the postnatal development of somatosensory corticospinal projections to the lumbar spinal cord, revealing a three-phase process of initial arrival, rapid grey matter ingrowth, and subsequent laminar refinement that establishes adult-like connectivity by postnatal day 17.