Bore atrophy is one of many types of atrophy that affects the skin, often only on the face and neck rather than the entire body. It is characterized by the appearance of brown spots on the skin, which become darker over time and may increase in size. Typically, atrophy occurs at the site of damaged areas of the skin, such as
Brown atrophy (lat. homoeojectio) is a type of muscle paralysis in various diseases of the motor neuron centers, including hypo-, para- and tetraparesis. As is known, damage to motor neurons leads to muscle weakness due to a decrease in muscle contractility. But in addition to this, during the course of the disease, the innervation of myocytes, the most important cells of muscle tissue, is disrupted. The result is a significant lack of bionaminans within muscle fibers, 31 which is commonly referred to as myocyte atrophy or, more precisely, myotonic degeneration.
The cause of brown atrophy is the deep destruction of the motor neuron, accompanied by significant disturbances in muscle-joint activity. Nerve inflammation is often found in patients with the atrophic type of the disease. There are progressive and chronic types of atrophy. The severity of the lesion may vary. The following main variants of pathology are noted. Let us describe the most typical phenomena characteristic of the initial phase of the disease. The first stage is accompanied by a decrease in weight, as the intoxication of muscle cells decreases. The contractility of the muscle remains the same. In the severe type, atrophy is noted immediately. Since the fibers have received little damage, the connective tissue that lies between the cells has not yet been completely destroyed. At the age of 65 years, the incidence of atrophy reaches 2%. At a young age, this type develops only in people 15–40 years old. It happens that atrophy is recorded in a younger or older age range. As the disease progresses, changes are noted in muscle fibers, atrophic cells are replaced by hyaline deposits. Pronounced sclerotic tissue is formed. The fiber density also changes. Cells lose their ability to fragment, which leads to sclerosis, that is, the proliferation of fibrous tissue