Define Interneuron Subpopulations in the Mouse Spinal Cord during Development

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Precise organization of neural circuits ensures proper functioning of the central nervous system (CNS). Assembly of these circuits requires correct specification of neuronal populations defined during development. One goal in my research is to understand developmental processes underlying formation of functional groups of spinal neurons. Different progenitor domains in the embryonic spinal cord give rise to the motoneurons (MNs) and different interneuron (IN) classes, each with a unique molecular profile. Distinct types of spinal INs emerge from these progenitor domains, and, as recently revealed, some undergo further subdivision to form heterogeneous populations. As yet, however, little is known about molecular mechanisms that govern such subdivision.