abnormal dorsal interneuron morphology abnormal dorsal interneuron 3 morphology MPheno.ontology MP:0021094 any structural anomaly of the dorsal interneurons that are excitatory, located in the deep dorsal horn and intermediate spinal cord, target motor neurons monosynaptically, have axons projecting rostrally, ipsilaterally, and longitudinally, and are characterized by expression of Acsl1, Gsh2, Brn3a, Tlx3, Isl1, and Drg11 abnormal dI3 morphology