Describe the anatomical position of the respiratory control centre and its role in regulation of ventilation.

Pneumotaxic centre – controls inspiratory time. Fourth ventricle – protects human brain from trauma via cushioning effect. Apneustic centre – leads to a gradual increase in the firing rate of the inspiratory muscles. Dorsal respiratory group (inspiration) – controls mostly inspiratorymovements and their timing. Ventral respiratory group (expiration and inspiration) – controls voluntary forced exhalation and acts toincrease the force of inspiration. Vagus and glossophraygeal – provides sensation, including taste, to the posterior third of the tongue, and also sensation to the back of the oral cavity and the oropharynx.