The amount of a dual specificity mitogen-activated protein kinase kinase 4 (human) when measured in cerebrospinal fluid. The trait is level of dual specificity mitogen-activated protein kinase kinase 4 (human) in cerebrospinal fluid (Ontology of Biological Attributes id OBA_2057881). Also known as: cerebrospinal fluid dual specificity mitogen-activated protein kinase kinase 4 (human) amount.