Longitudinal fissure Longitudinal fissure The longitudinal fissure (or cerebral fissure, median longitudinal fissure, or interhemispheric fissure) is the deep groove that separates the two hemispheres of the vertebrate brain. The medial surfaces of the two hemispheres are as similarly convoluted by gyri and sulci as is the outer surface of the brain. It is thought that a majority of existing animals, including Homo sapiens, have evolved from a common wormlike ancestor that lived around 600 million years ago, called the urbilaterian. A bilaterian animal is one that has symmetrical left and right body halves. While it is still debated whether this species
David Sylvian David Sylvian David Sylvian (born David Alan Batt, 23 February 1958) is an English singer-songwriter and musician who came to prominence in the late 1970s as frontman of the band Japan. The band's androgynous look and increasingly electronic sound made them an important influence on the UK's early-1980s New Romantic scene. Following their breakup, Sylvian embarked on a solo career with his debut album "Brilliant Trees" (1984). His solo work has been described by AllMusic as "far-ranging and esoteric," and has included collaborations with artists such as Ryuichi Sakamoto, Robert Fripp, Holger Czukay, and Fennesz. The band Japan, whose other