A lung scan is a type of nuclear scanning test. It is most often used to find a pulmonary embolism. This is a blood clot that prevents normal blood flow in the lung. Two types of lung scans are usually done together: Ventilation scan. During this scan, you inhale a radioactive tracer gas or mist. Pictures from this scan can show areas of the lungs that aren't getting enough air or that hold too much air.
One interesting theory on the cause of manic depression or bipolar disorder is that there is a super-fast biological clock located in the hypothalamus, in the center of the brain, which is actually a tiny cluster of nerves called the supra chiasmatic nucleus or SCN.
Manic Depression. Bipolar disorder, also known as manic depression, is a chronically recurring condition involving moods that swing between the highs of mania and the lows of depression.hile the depression of bipolar disorder can resist treatment, mood swings and recurrences can often be delayed or prevented with a mood stabilizer, on it's own or combined with other drugs.