The midbrain is located between the old and new brain and controls the old smooth muscle. The conflict content is the MORSEL and right in and left out (see embryonic development). In the active phase, cell proliferation and functional enhancement are also the biological sense. In the healing phase, this cell increase remains or is not degraded by microbes. The handedness has no significance. The left midbrain controls the left organ side. The right midbrain controls the right organ side (no crossing from the brain to organ, see embryonic graphic development).