While the presence of Islam in West Africa dates back to eighth century, the spread of the faith in regions that are now the modern states of Senegal, Gambia, Guinea, Burkina Faso, Niger, Mali and Nigeria, was in actuality, a gradual and complex process.
Hypoventilation is a condition that arises when air entering the alveoli, small air sacs in the lungs that are the site of respiratory gas exchange, is reduced. This causes levels of oxygen to decrease and the levels of carbon dioxide to increase.
Hypoventilation is usually secondary to other conditions, meaning other conditions lead to it. Some of these include COPD, chest wall deformities, central respiratory drive depression, obesity, neuromuscular disorders, myxedema, and trauma.