Between Africa and South America, the Atlantic is its narrowest at 2848 km or 1765.76 miles in width. Its maximum width is in the mid-Atlantic (New York to Spain) or between â¦ southern South America and the tip of Africa. This is about 4000 miles (6400 km).
As mentioned above, allergies account for the most common cause of chronic sneezing. This is often seen in allergic rhinitis, which may either be perennial (present all year) or seasonal (occurs intermittently, usually during certain seasons like spring).
So neurology steps in: Most experts now agree that crossed wires in the brain are probably responsible for the photic sneeze reflex. A sneeze is usually triggered by an irritation in the nose, which is sensed by the trigeminal nerve, a cranial nerve responsible for facial sensation and motor control. This nerve is in close proximity to the optic nerve, which senses, for example, a sudden flood of light entering the retina.