American Society of Nephrology of the American Society of Nephrology" (JASN), the "Clinical Journal of the American Society of Nephrology" (CJASN), the "Nephrology Self-Assessment Program" (NephSAP), "ASN Kidney News and Kidney News Online", "In The Loop", and more recently the Kidney Self Assessment Program (KSAP). The ASN holds annual meetings (Kidney Week) and subsequent regional meetings (ASN Highlights) to discuss new developments in the field of nephrology. The ASN also provides an Annual Board Review Course & Update and other online learning opportunities for both established nephrologists and those in training. In 2012, nearly 1,200 instructional hours were offered by ASN to physicians, researchers,
Circumventricular organs Circumventricular organs Circumventricular organs (CVOs) are structures in the brain characterized by their extensive and highly permeable microvasculature, unlike those in the rest of the brain where there exists a blood brain barrier (BBB). The term "circumventricular organs" was originally proposed in 1958 by Austrian anatomist Helmut Hofer, in recognition of the distribution of the structures around the ventricular system of the brain. The circumventricular organs are midline structures around the third and fourth ventricles that are in contact with blood and cerebrospinal fluid, and allow for the linkage between the central nervous system and peripheral blood. Additionally, they are