Breathing is mainly controlled by the brainstem , especially a part called the medulla oblongata, with help from the pons.

Core brain areas

  • The medulla oblongata in the brainstem contains key respiratory centers that generate the basic rhythm of breathing and adjust it automatically to keep you alive.
  • The pons, another brainstem region, helps fine‑tune the pattern of breathing, smoothing the transitions between inhaling and exhaling.

Automatic vs conscious control

  • Normal, automatic breathing (like when you sleep) is handled by these brainstem centers without you needing to think about it.
  • Higher brain regions in the forebrain, including parts of the cerebral cortex, can temporarily override this (for example, when you hold your breath or speak), but the brainstem will reassert control if oxygen or carbon dioxide levels become unsafe.

Why this matters clinically

  • Damage to the medulla or lower brainstem can severely disrupt or stop breathing, which is why injuries or strokes in this region are life‑threatening and often require ventilatory support.
  • Many life‑support machines in critical care are essentially substituting for the brainstem’s respiratory centers when they cannot maintain an adequate breathing rhythm.

Information gathered from public forums or data available on the internet and portrayed here.