Eating disorder portion of the vulnerability to develop eating disorders can be inherited, and there is evidence to show that there is a genetic locus that shows susceptibility for developing anorexia nervosa. About 60% of eating disorder cases are attributable to biological and genetic components. Other cases are due to external reasons or developmental problems. There are also other neurobiological factors at play tied to emotional reactivity and impulsivity that could lead to binging and purging behaviors. Epigenetics: Epigenetic mechanisms are means by which environmental effects alter gene expression via methods such as DNA methylation; these are independent of and do not
Nocturnal sleep-related eating disorder patients had problematic eating in the evening between dinner and bedtime; sleep onset insomnia was not present; and sleep latency was usually brief, apart from several patients with RLS." After realizing what was wrong with them, many of Schenck and Mahowald's patients with NSRED restricted their day eating and over exercised. This table summary identifies the first initial findings concerning NSRED, and it shows how NSRED is a random malady that affects many different types of people in individual ways. Nocturnal sleep-related eating disorder Nocturnal sleep-related eating disorder (NSRED), also known as sleep-related eating disorder (SRED), sleep eating, or somnambulistic