Amnesia:
Amnesia refers to the loss of memory. Memory loss result from two-sided (bilateral) damage to parts of the : rain vital for memory storage, processing, or recall (the limbic system, including the hippo campus in the medial temporal lobe). Amnesia can be a symptom of several neurodegenerative nseases; however, people whose primary symptom is memory less (amnesiacs), typically remain lucid and retain their sense : £ self. They may even be aware that they suffer from a memory Lsirder. People who experience amnesia have been instrumental in helping brain researchers determine how the brain processes memory. Until the early 1970s, researchers viewed me mory as a single entity. Memory of new experiences, motor skills, past events, and previous conditioning were grouped -seether in one system that relied on a specific area of the ----in If all memory were stored in the same way, it would be reasonable to deduce that damage to the specific brain Area would cause complete memory loss. However, studies of amnesiacs counter that theory. Such research demonstrates lint the brain has multiple systems for processing, storing,' drawing on memory.
ocentesis:
Amniocentesis is a procedure used to diagnose fe¬tal defects in the early second trimester of pregnancy. A sample of the amniotic fluid, which surrounds a fetus in the womb, is co Aected through a pregnant woman’s abdomen using a needle --1 svringe. Tests performed on fetal cells found in the sample ---- reveal the presence of many types of genetic disorders, thus allowing doctors and prospective parents to make important t - is ions about early treatment and intervention.Amputation: Amputation is the intentional surgical removal of ■ nmb or body part. It is performed to remove diseased tissue or relieve pain.
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