... because it allows the animal to restore the effectiveness of its core regula-tory systems. At the same time, the brain mind is off-line and free to reorganize its cognitive repertoire as well as ... prolonged use of a group of antidepressants known as the selective serotonin reuptake inhibitors (SSRIs) can lead to RBD. This suggests that serotonin, which is known to be a potent inhibitor of REM, ... dreams. The 88 6 Disorders of dreaming answer is the same, too. It is brain activation and, in particular, activation of an important and ancient area called the limbic brain. What kind of...