Many psychiatric disorders have heightened impulsivity

The study analyzed data from studies across eight different psychiatric disorders, including major depressive disorder, bipolar disorder, borderline personality disorder, schizophrenia, eating disorders, and others. The largest delay discounting effects were found to be associated with bipolar disorder, borderline personality disorder, and schizophrenia.

Gene linked to needing less sleep identified

The genetics of circadian rhythms have been well studied in recent years, but much less is known about other types of genes that play a role in sleep. Now, by studying a family with several members who require significantly less sleep than average, a team of researchers has identified a new gene that they believe has a direct impact on how much someone sleeps.