Neonatal hypotonia Generalized neonatal hypotonia Muscular hypotonia (abnormally low muscle tone) manifesting in the neonatal period and affecting the entire musculature. Generalised neonatal hypotonia Generalised low muscle tone in neonate Generalized low muscle tone in neonate Hypotonia, neonatal, generalized Hypotonia, neonatal, generalised UMLS:C1845123 HP:0008935