The above are the Pyramids area, crossing area where 80% of descending fibers. This determines the right movement of the body is controlled by the left hemisphere and vice versa. in the medulla oblongata controls the blood pressure, the diameter of blood vessels, the pause between expiration and inspiration, heart rate and force of the heartbeat. There are centers and dorsal respiratory groups (controlled breathing) and ventral (control inspiration and expiration is required only when high ventilation). These centers also receive signals from the lung (stretch receptors) via the vagus nerve, which stop inspiration (protective reflex Hering-Brewer).
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