Category: O

The curved segment of the ulna commonly referred to as the elbow. The large process of the ulna that projects behind the elbow joint. The large process on the ulnar bone that projects behind the joint of the elbow.  

Acute spasm and involuntary deviation or fixation of the eyes in an upward gaze; associated with dystonia from antipsychotic or antiemetic medications. An abnormal condition in which the eyes are held in a fixed position for several minutes or hours. Oculogyric crises may occur in cases of post-encephalitic parkinsonism or as a result of a…

Muscle that retracts and tenses scalp.    

Complete occlusion of a blood vessel by a clot or plaque.  

Condition that occurs when a blockage of the main bloodstream interferes with tissue perfusion; possible causes include compression vena cava, pericardial tamponade, and pulmonary embolism. Circulatory collapse caused by conditions that block the flow of blood into or out of the heart, such as cardiac tamponade, cardiac tumors, massive pulmonary embolism, or tension pneumothorax. Obstructive…

An acute or chronic inflammation of the bile ducts due to cirrhosis or gallstones.  

Severe, unrelieved constipation.  

Facial muscle that circles the mouth.  

Abnormal condition, occurring among persons exposed to ozone in high-altitude aircraft, characterized by sleepiness, headache, chest pains and itchiness.  

Condition of the nose, sometimes following chronic inflammation of the nasal mucosa, characterized by a nasal discharge, an offensive odor, and crusting of nasal secretions. A disorder of the nasal mucosa in which the sides of the nasal cavity become atrophied, with the production of an offensive discharge and crusts. A disease of the nose…