Atrophy can be categorized based on its cause and the tissue type affected:
Disuse Atrophy: Occurs when a muscle or tissue is not utilized, such as in a limb immobilized in a cast. Neurogenic Atrophy: Caused by nerve damage affecting muscle stimulation, leading to muscle wasting. Vascular Atrophy: Due to inadequate blood supply, as seen in conditions like ischemia. Endocrine Atrophy: Arises from a deficiency of trophic hormones, such as the shrinkage of the adrenal gland when there is decreased ACTH stimulation. Senile Atrophy: Associated with aging, such as the thinning of the skin.
