Physiological atrophy
Introduction
Introduction Under physiological conditions, certain tissues and organs of the body undergo atrophy with age, such as thymus, gonads, and bursa. The volume of cells and interstitial cells constituting organs and tissues is reduced, and the number of cells is reduced. There are no obvious other changes in the cells other than the small form, but the consumption of pigments often occurs in the cytosol. Many structures, tissues and organs gradually shrink when the body develops to a certain stage, usually due to the shrinkage of the parenchymal cells of various tissues and organs, and sometimes due to the decrease in the number of cells.
Cause
Cause
Many structures, tissues and organs gradually shrink when the body develops to a certain stage, usually due to the shrinkage of the parenchymal cells of various tissues and organs, and sometimes due to the decrease in the number of cells. After any part of the motor neurons is damaged, the acetylcholine released from the distal part is reduced, and the sympathetic nutrient function is weakened and the muscle is atrophied. Myogenic muscle atrophy is caused by the disease of the muscle itself.
Examine
an examination
Related inspection
General radiography examination CT examination
For example, in the early childhood, the atrophy of the arterial catheter and umbilical cord blood vessels, the gradual degeneration of the thymus after puberty, the uterine involution after the gestation period, and the rejuvenation of the breast tissue after the lactation period. In the presence of organ function or endocrine and metabolic disorders, or the external environment of the wind, the role of physical conditions of sunlight, or the influence of genetic factors, in addition, almost all organs and tissues in the old age have atrophy to varying degrees, the so-called senile atrophy, especially The brain, heart, liver, skin, bones, etc. are obvious.
Diagnosis
Differential diagnosis
Pathological atrophy generally has:
1. Malnutrition atrophy: caused by insufficient protein intake or excessive consumption of blood.
2, oppressive atrophy: tissue or organ caused by prolonged oppression. For example, when the hydronephrosis occurs, the renal cortex medulla is atrophied.
3. Disuse atrophy: caused by long-term function and metabolism of organs. For example, patients who have been bedridden for a long time have muscle atrophy.
4, denervation atrophy: due to motor neurons or axonal damage caused by effector atrophy. For example, muscle atrophy in polio.
5, endocrine atrophy: due to decreased endocrine gland function caused by target organ cell atrophy. For example, after menopause, the uterus shrinks.
