Four Types of Actuators. An actuator is a kind of motor that controls or moves mechanisms or systems. It takes hydraulic fluid, electric current or other sources of power and converts the energy to facilitate the motion.
Dercumâs disease, also known as adiposis dolorosa, is a rare disorder characterized by multiple, painful growths consisting of fatty tissue, called lipomas. They mainly occur on the trunk, the upper arms and upper legs and are found just below the skin.
The initial presentation of celiac disease in patients in their 20s and 30s may be dermatitis herpetiformis. This condition usually appears as clear or blood-tinged vesicles symmetrically distributed over the extensor areas of the elbows, knees, buttocks, shoulders and scalp (Figure 8).