“…A few investigators, mainly from Japan, have reported that prominent psychiatric symptoms, as well as sleep disturbance, are associated with this condition. We found 11 such patients (including ours) from the literature (Ishino et al ., 1971; Ikeda, 1987; Fukutani et al ., 1993; Kushida et al ., 1995; Inui et al ., 2000; Mizoguchi et al ., 2000; Takama et al ., 2000). MJD was diagnosed clinicopathologically for six and for five by molecular genetics.…”