Prænatal eksponering af rotteunger for phenylacetat (den aktive metabolit af phenylbutyrat) medførte læsioner i de kortikale pyramideceller; de dendritiske udløbere var længere og tyndere end normalt og reduceret i antal.
Prenatal exposure of rat pups to phenylacetate (the active metabolite of phenylbutyrate) produced lesions in cortical pyramidal cells; dendritic spines were longer and thinner than normal and reduced in number.