FMRP is involved in the dendritic and neurite transfer of mRNA molecules and a deficiency of FMRP function can lead to altered neurite levels and synaptic cleft levels of mRNA molecules under the effect of a stimuli, for example in neurodevelopmental disorders (Darnell et al., 2011) or under the effects of drugs of abuse (Smith et al., 2014). Here, FMR1 is linked to neurodevelopmental disorder.