The amount of a serine/threonine-protein kinase PAK 3 (human) when measured in cerebrospinal fluid. The trait is level of serine/threonine-protein kinase PAK 3 (human) in cerebrospinal fluid (Ontology of Biological Attributes identifier OBA_2056411). Also known as: cerebrospinal fluid serine/threonine-protein kinase PAK 3 (human) amount.