A sst GABAergic cortical interneuron with a soma found in lower L5 with mostly local axonal arborization but with some sparse ascending axons. L5 non-Martinotti sst cells show somatic localization and local axon plexus in L5b and L5b/6 and substantial innervation of L3 and L4, and receive thalamic input from the ventral posteromedial nucleus and specifically target L4 neurons, avoiding L5 pyramidal cells. L5 non-Martinotti sst cells tend to show a higher input resistance and seem to be less stuttering. [ http://www.ncbi.nlm.nih.gov/pubmed/29326172 http://www.ncbi.nlm.nih.gov/pubmed/28254942 ]