The problem whether the blood circulation influences or determines the asymmetry of Nuclei habenulae was tested by removing the heart-anlage of the embryo ofTriturus alpestris. The resulting larvae without any blood circulation developed their normal asymmetry of habenulae.Isolates from the head region of neurulae ofTriturus alpestris, consisting of cephalic ecto and mesoderm, sometimes also of entoderm, under favorable conditions could develop brains with Nuclei habenulae. These were normal, asymmetric in spite of missing the blood circulation and other asymmetrical organs.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.