Primary we can see, when there is no menstruation in a girl of fourteen, while other signs of puberty are not observed, and when sixteen years did not come menstruation, but there are signs of maturity. Both cases have different causes, and therefore there is such a division. Amenorrhea can also be physiological - menopausal women after forty-five years, and in girls up to the age of fourteen. Physiological amenorrhea also observed in pregnant women during lactation, when the amount of prolactin in the blood increases, which prevents an increase in endometrial and maturation of the egg.
Eastern poison ivy is the scientific name of ivy tox (lat. Toxicodendron radicans). This plant has no relation to a simple harmless ivy. They look very similar, so it is so called. It is often confused ivy and sumac. But sumac - it's lacquer tox in the form of a bush or tree. Those. they are very similar, but still different.
What is poison ivy?Ivy belongs to the poisonous plants, touching the leaves that you can burn yourself or get other consequences - for example, as a general poisoning. It is poisonous all - and the stem and leaves, and flowers, and fruits.
But, in spite of the high toxicity and danger to human life, this ivy is considered a plant that has medicinal properties, and it is often used in medicine. Therefore it is necessary to get acquainted with this interesting and controversial plant so close, to know what the threats and benefits it hides.
This plant is very different from neighbors kind Toxicodendron Mill, having the form of a tree. Poison ivy is more like a vine, sometimes - a small shrub. He let his long, flexible stems on the ground or trees envelops them, using the additional roots.
Back in the 19th century, cases of inability to recognize faces were recorded. Studies of this phenomenon involved Hyulings John Jackson and Jean-Martin Charcot.
However, a systematic description of this phenomenon for the first time gave the German neurologist Joachim Bodamer (Joachim Bodamer). In 1947, he first used the term prosopagnosia, which literally means "misrecognition person" and systematically described three cases of this disorder.