(Greek: above, over; excessive; more than normal; abnormal excess [in medicine]; abnormally great or powerful sensation [in physical or pathological terms]; highest [in chemical compounds])
2. Abduction (movement of the limbs toward the lateral plane or away from the body) of a limb beyond the normal limit.
"Some medical specialists suggest that a hyperactive adult might have brain damage and psychosis, but not necessarily."
There is evidence that cathelicidin peptides (which are chemotactic, angiogenic, and bactericidal, and are important for innate immune responses in the skin) are involved in the pathogenesis of rosacea.
2. A higher than normal level of activity.
A body organ can be described as hyperactive if it is more active than normal and a person's behavior can also be considered as hyperactive.
People who are hyperactive always seem to be in motion. They can't sit still; they may dash around or talk incessantly. Sitting still through a lesson can be an impossible task. They may roam around the room, squirm in their seats, wiggle their feet, touch everything, or noisily tap a pencil. They may also feel intensely restless.
"Deafness is not the only danger of noise exposure of hyperacusia; in fact, the stress causes some 45,000 fatal heart attacks a year in the developing world, according to researcher Dieter Schwela of the Stockholm Environment Institute."2. Increased sharpness of hearing or a condition that exists when sounds are perceived as abnormally loud: "Although Caroline always wanted to attend a live concert with her favorite band, she was advised not to do so because of the hyperacusia in her ears which would make going to the concert a terribly painful experience."
Epinephrine is a substance produced by the medulla (inside) of the adrenal gland.
The name epinephrine was coined in 1898 by the American pharmacologist and physiologic chemist (biochemist) John Jacob Abel who isolated it from the adrenal gland which is located above (epi-) the kidney (Greek nephros).
Epinephrine causes increased rapidness of the heart beat, strengthens the force of the heart's contraction, opens up the airways (bronchioles) in the lungs, and has numerous other effects.