¶ … Huntington's disease affects families
What is Huntington's disease, and how does it affect the patient and his family? How does one deal with the patient? Is there any cure for the disease, and what is it? When was the disease discovered? Who discovered it, and how was it discovered? What way is support offered from external sources for the disease, and how can one avail of the support? What, exactly is Huntington's disease? It is a genetic disease that affects the central nervous system, in individuals who are thirty years and above, though it does occur sometimes in people younger than this. When the disease occurs, it occurs as an inherited autosomal dominant condition, and it affects all or most of the family members within the same family. The onset of symptoms and of the rate of the progression of the disease may differ between the different family members, and this is an important fact to remember. The symptoms of Huntington's disease are those of involuntary movements, and a loss in motor control. A change may occur in the very personality of the patient, and some other symptoms may include memory loss, and a decreased mental capacity. The various symptoms in individuals are generally used to properly diagnose the other family members, and then this is used to determine what the diagnosis must be. Genetics of Huntington's disease)
The human body contains about 100 trillion cells, and within each cell is a nucleus. Each nucleus contains 46 chromosomes that are arranged in 23 pairs, and one chromosome of every pair is from one parent, and the other from the other parent. These chromosomes carry the DNA that are tightly coiled within the nucleus, and within this DNA are the genes, literally segments of the DNA, that contain the various instructions that the human body needs in order to make proteins and the various other building blocks of life. Every human being has 23 chromosomes from the mother, and another 23 from the father, and chromosomes are of two types, which are 22 pairs of autosomal chromosomes, and 1 single pair of sex chromosomes, two X chromosomes in the female and an X and a Y in the male. Since Huntington's disease is autosomal dominant, this means that the gene involved is that of an autosomal chromosome and not that of the 23rd pair, that is, the sex chromosome.
Recent research has further revealed the fact that the fourth pair of autosomal chromosomes is in fact responsible for the disease. In the affected person, therefore, one gene of the pair of genes of the fourth autosomal chromosome does not function properly, and this means that it will automatically start to dominate over the properly functioning gene, and since it has nothing to do with the sex chromosome, it can affect both men and women equally, and the affected man would have the same chances of spreading the disease to his children as a female. Therefore, a parent, whether male or female, can pass on the unaffected gene form the pair of affected genes on to his children, and can also pass on the affected one; there is a fifty percent chance of the child inheriting the affected gene from his parent of either sex. However, the age of the onset of the disease, the variation of the symptoms, and the progression of the disease are different from individual to individual. (Genetics of Huntington's disease)
Analysis:
Huntington's disease is the inevitable result of a genetically programmed degeneration of brain cells, also known as neurons, in some particular areas of the human brain. The degeneration causes certain symptoms, and these are uncontrollable movements, degeneration in memory as well as in mental faculties, and also a severe mental disturbance. Since it is through a gene that the disease is spread, the child ahs a fifty percent chance of inheriting it from his parents, of either sex. However, if the child has not inherited the disease, then it means that he will not pass it on to his children, and also to further subsequent generations. If he does inherit it, however, then he will sooner or later develop the dreaded symptoms of the disease, and when one child has inherited the disease, it does not mean that other children of the same parents would also have inherited it; it depends on the gene that has been passed on to all the children of the same family. (NINDS Huntington's Disease Information Page)
Some of the early symptoms of the Huntington's disease are a difficulty in remembering...
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