<h4>Introduction</h4>Fragile X-associated tremor/ataxia syndrome (FXTAS) is a late-onset neurodegenerative disorder affecting carriers of premutation expansions (55-200 CGG repeats) in the fragile X messenger ribonucleoprotein 1 (<i>FMR1</i>) gene. Here, FMR1 is linked to fragile X-associated tremor/ataxia syndrome.