Inability to control temps, Tachy Brady, aspiration, reflux. Geneticist suggested peripheral or central nervous system disorder. Like what?

Brainstem problem? Speculating: Cardioacceleratory-cardioinhibitory nucleus is in the medulla oblongata. So is the nucleus ambiguus (control of pharyngeal muscles). The thermoregulatory center is distant, in the preoptic anterior hypothalamus, BUT descending fibers pass through the medulla because everything must. So it could be a multisystem CNS problem or localized to the medulla. Call in a pediatric neurologist.