Glucocerebroside (also called glucosylceramide) is any of the cerebrosides in which the monosaccharide head group is glucose. Glucocerebroside (also called glucosylceramide) is any of the cerebrosides in which the monosaccharide head group is glucose. They occur mostly in non neuronal tissue and accumulate abnormally in Gaucher disease, where glucocerebrosidase is absent or nonfunctional.