What is the middle eminence?
It is located on the base of the brain structure called hypothalamus, medium eminence normally excludes substances that control the pituitary that releases many hormones of the body. Medium eminence is usually placed behind a place where optical nerves cross and are also close to the nervous connection between the hypothalamus and pituitary. Nervous extension called axons extend into the inside of the structure from other parts of the brain. The outer part usually contains a network of nerve endings and small portal blood vessels that carry substances to the pituitary gland.
neurons that release substances such as dopamine, hormone releasing growth hormones (GHRH), somatostatin, and hormone releasing corticotrophin (CRH), usually end in medium eminence. Compounds released from these cells may enter the blood if necessary. The internal portal system usually includes three cellular layers that control secretion based on the sent signals and. Nerve terminals and neurological components called gli cells are located in the area, although the synapor communication ends of nerve cells are generally not found here.
Medium eminence usually acts as a connection between the control of the neurological hormone and the endocrine system. Reproduction, growth, stress and metabolism can be regulated by activity in this part of the brain. The blood barrier in the structure is generally porous, so it can respond to chemical signals in the circulatory system as other parts of the brain called peripheral organs. It is also part of the pituitary portal system, where nerve signals are usually sent to the endocrine glands of the body.
Under the microscope, medium eminence usually has four different zones that are differentiated according to cell types placed in each. The areas include a chamber, myelinated axon, nervous profile and capillary zones. Nerve cell terminals in the capillary zone are usually connected to holes in small blood vessels where secretions can pass into the blood.
The overall function of medium eminence can change with age. The region, which is also able to secrete the hormone releasing gonadotropin (GNRH), may slow down the release of this substance; It usually does so when the mammal is not produced; The formula in which this occurs often depends on age and type. Damage to medium eminence, which may disrupt communication between different cells, sometimes affects the function of the pituitary. Abnormal hormone production can then cause various symptoms, including extreme thirst or frequent urination.