Category: H

A funnel-shaped stem which attaches the pituitary gland to the hypothalamus.  

A lack of sodium in the body. A serum concentration of sodium below the normal range. It may be produced by dilution of blood (from giving large volumes of salt-poor solutions intravenously), excessive water retention (inappropriate secretion of antidiuretic hormone), excessive sodium loss and, rarely, by inadequate salt intake. When severe, it may result in…

The production of too little blood at menstruation.  

A condition in which the body does not have enough insulin, often because of a problem with the pancreas. A deficiency of insulin due either to inadequate secretion of the hormone by the pancreas or to inadequate treatment of diabetes mellitus.  

A condition in which someone produces too little sweat. An abnormal condition characterized by inadequate perspiration. Hypohidrosis leads to heat intolerance and extreme discomfort after physical exertion or after eating hot or spicy foods. It is often accompanied by other abnormalities in the growth of body structures or cells. Hypohidrosis refers to decreased activity of…

The twelfth cranial nerve which governs the muscles of the tongue. One of a pair of motor nerves, the twelfth cranial nerves, involved in swallowing and in movements of the tongue. The twelfth cranial nerve (XII), which supplies the muscles of the tongue and is therefore responsible for the movements of talking and swallowing. The…

Underneath or on the lower side of the tongue. Relating to the hypoglossal nerve. A canal just inside the foramen magnum in the occipital bone that transmits the hypoglossal nerve and a branch of the posterior meningeal artery.  

The part of the abdomen beneath the stomach. That part of the central abdomen situated below the region of the stomach. The region below the umbilicus or navel, between the right and left inguinal regions. The central area of the abdomen situated below the belly button.  

An unusually low concentration of gamma globulin in the blood that causes an immune deficiency. It may be present from birth or acquired later in life. A lower-than-normal amount of the protein gamma-globulin in the blood. The origin may be genetic several types are inherited or an acquired defect (for instance, some lymphomas cause the…

A condition in which there is not enough fibrinogen in the blood, e.g. because of several blood transfusions or as an inherited condition.