FGF14 and schizophrenia: Anatomical abnormalities found in the CA1 hippocampal region of post-mortem brains from schizophrenia patients have been identified as an index of the disease severity and treatment responsiveness.55 These studies along with the reported association between hippocampal PV neurons with cognitive function in the normal brain and in schizophrenia, prompted us to begin our investigations in the CA1 hippocampal region.15, 16, 46, 47, 55 Thus, we first asked whether FGF14 was expressed in PV interneurons in the CA1 region.