The brains three sensory circumventricular organs the subfornical organ organum vasculosum of the lamina terminalis and the area postrema lack a blood brain barrier and are the only regions in the brain in which neurons are exposed to the chemical environment of the systemic circulation therefore they are ideally placed to monitor the changes in osmotic ionic and hormonal composition of the blood this book describes their. The brains three sensory circumventricular organs the subfornical organ organum vasculosum of the lamina terminalis and the area postrema lack a blood brain barrier and are the only regions in the brain in which neurons are exposed to the chemical environment of the systemic circulation therefore they are ideally placed to monitor the changes in osmotic ionic and hormonal composition of the blood this book describes their. The sensory circumventricular organs of the mammalian brain subfornical organ ovlt and area postrema advances in anatomy embryology and cell biologypdf the sensory circumventricular organs of the mammalian brain subfornical organ ovlt and area postrema advances in anatomy embryology and cell biology repository id 5f9431c2badb5 page 1 4 1038392. The brains three sensory circumventricular organs the subfornical organ organum vasculosum of the lamina terminalis and the area postrema lack a blood brain barrier and are the only regions in the brain in which neurons are exposed to the chemical environment of the systemic circulation therefore they are ideally placed to monitor the changes in osmotic ionic and hormonal composition of the blood this book. The brains three sensory circumventricular organs the subfornical organ organum vasculosum of the lamina terminalis and the area postrema lack a blood brain barrier and are the only regions in the brain in which neurons are exposed to the chemical environment of the systemic circulation therefore they are ideally placed to monitor the changes in osmotic ionic and hormonal composition of the blood this book describes their