A relatively mild and uncommon disorder that occurs in elderly adults and is characterized by choreic movements.
Chorea refers to rapid complex body movements that look well coordinated and purposeful but are, in fact, involuntary. Chorea was thought suggestive of a grotesque dance. The term “chorea” is derived from the Greek word “choreia” for dancing (as is choreography).
Senile chorea is believed by some scientists to be caused by a different gene mutation than that responsible for Huntington chorea (Huntington disease).
- Senile lentigo
A benign pigmented flat spot on sun-exposed skin in older adults, especially on the back of the hands and on the forehead. Also called a liver spot.
1. Originally, old age. 2. The physical decline associated with old age. 3. The mental decline once associated with old age but now known to be due to dementia, as for instance Alzheimer’s disease and atherosclerosis. “The road to senility is paved with plaques.” (Paul F. Wehrle, MD [1921-2004] pediatrician and vaccine researcher who helped […]
In medicine and physiology, sensation refers to the registration of an incoming (afferent) nerve impulse in that part of the brain called the sensorium, which is capable of such perception. Therefore, the awareness of a stimulus as a result of its perception by sensory receptors. (Sensory is here synonymous with sensation.) The word “sensation” comes […]
In biology and medicine, the faculty of sensory reception. The ability to convey specific types of external or internal stimuli to the brain and perceive them. Sensory reception occurs through a process known as transduction in which stimuli are converted into nerve impulses which are relayed to the brain. This process may involve the special […]
- Sense, balance
The inner ears (also called the labyrinth) monitor the directions of motion, such as turning or forward-backward, side-to-side, and up-and-down motions. The eyes observe where the body is in space (i.e., upside down, right side up, etc.) and also the directions of motion. Skin pressure receptors such as those located in the feet and seat […]