Synapses on the axon hillocks and initial segments of pyramidal cell axons in the cerebral cortex.
D000818:Animals; D001369:Axons / Q000166:cytology*; D002415:Cats; D002462:Cell Membrane; D002540:Cerebral Cortex / Q000166:cytology*; D008854:Microscopy, Electron; D009186:Myelin Sheath / Q000166:cytology; D012270:Ribosomes; D013569:Synapses / Q000166:cytology*