abnormal dorsal interneuron morphology abnormal dorsal interneuron 2 morphology abnormal dI2 morphology MP:0021093 MPheno.ontology any structural anomaly of the dorsal interneurons that are ascending, contralaterally projecting, relay interneurons, migrate to the intermediate spinal cord and ventral horn, and are characterized by expression of Olig3, Nlgn1, Brn3a, Foxd3, Lhx1, and Lhx5