abnormal ventral interneuron morphology abnormal ventral interneuron 3 morphology abnormal V3 morphology MP:0021105 any structural anomaly of the ventral interneurons that are glutamatergic, predominantly project contralaterally and caudally, form connections with V1, V2 and lamina VIII interneurons, and are characterized by expression of Nkx2-2, Nkx601, Ngn3, and Sim1 MPheno.ontology