If youâre concerned about disc protrusions, a general list of symptoms to watch for include: 1  Discomfort, numbness and tingling in the affected area and associated limbs. 2  Localized neck and back pain. 3  General stiffness and soreness, especially in the morning or after periods of inactivity. 4  Sciatica. 5  Muscle weakness.
Definition of ETIOLOGY. 1. : cause, origin; specifically: the cause of a disease or abnormal condition. 2. : a branch of knowledge concerned with causes; specifically: a branch of medical science concerned with the causes and origins of diseases.
If the disease is not treated, however, it may progress to the stage where it causes subjective symptoms and abnormal physical findings. Therefore, the distinction be-tween asymptomatic and symptomatic disease is one of degree, depending primarily on the extent of the disease. The term etiology means cause. A disease of unknown etiology is one for which the cause is not yet known. Unfortunately, many diseases fall into this category. If the cause of a disease is known, the agent responsible is called the etiologic agent. The term pathogenesis refers to the manner by which a disease develops, and a pathogen is any microorganism, such as a bacterium or virus, that can cause disease. Classifications of Disease Diseases tend to fall into several large categories, although the diseases in a specific