has soma location has soma location in taxon expresses expresses cerebral cortex GABAergic interneuron L4 sst Martinotti interneuron (Mmus) L4 sst interneuron (Mus) A sst GABAergic cortical interneuron with a soma found in lower L2/3 and upper 5, L4 Sst cells have Martinotti morphology with ascending axons but denser local axons and sparser ‘fanning-out’ projections to L1. L4 sst cells have smaller membrane time constant to calb2 (L2/3/5 fan Martinotti Cell) and non-zero afterdepolarization (ADP). L4 SST (Mus musculus) Martinotti neuron Mus musculus somatostatin (mouse) cortical layer IV