Generalized muscular hypotonia (abnormally low muscle tone). The phenotype is Human Phenotype Ontology term HP_0001290 (Generalized hypotonia). Also known as: Generalised decreased muscle tone, Generalised hypotonia, Generalised muscular hypotonia, Generalized decreased muscle tone, Generalized muscular hypotonia, Hypotonia, generalised, Hypotonia, generalized.