Outline some indicators of neurologic impairment due to ventilatory and oxygenation failure?

What will be an ideal response?

When neurologic functions are impaired due to ventilatory and oxygenation failure, the patient may experience headache, mental status changes, motor disturbances, and ocular abnormalities. The patient usually describes the headache as "pressure in the head" having a higher intensity during night and early morning hours. Hypoxia, hypercapnia, and acidosis are responsible for the changes in a patient's mental status. Early mental disturbances include drowsiness, forgetfulness, and irritability. In severe or chronic cases of hypoxia and hypercapnia, stupor and coma may occur. Hypercapnia may also cause muscle tremor and ocular abnormalities.