However, what I'm concerned about is the effect on the developing brain, because the endocannabinoid system—that is the system that exists naturally in the nervous system and throughout the body, in which substances similar in actions to the plant cannabinoids are the actual transmitter substances that modify nerve function—during the in utero development of the fetus has been shown to increase the generation of nerve cells in their mobility to their final site but to impair their ability to establish connections with each other to set up the nerve circuits that are required for laying down memories, for learning skills, and for carrying ...[+++] out higher functions.