In neurally mediated syncope, prognosis depends on the course of the underlying medical condition. Another example can be seen in the neurally controlled animat. This is the world's first in production neurally controlled wheelchair. Neurally mediated syncope occurs when blood vessels expand and heart rate decreases inappropriately. Neurally adjusted ventilatory assist (NAVA) is a mode of mechanical ventilation. The risks are higher for young adolescents because their brains are not neurally mature.