PSY 350 - Week 2 - Assignment - Movement Disorders

Mar 30th, 2015
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Running head: HUNTINGTONS DISEASEMovement Disorder: Huntingtons DiseasePSY 3501HUNTINGTONS DISEASE2Huntingtons DiseaseHuntingtons Chorea is a progressive and degenerative disease that destroys neurons inthe areas of the brain involved in emotions, intellect, and movement (Zeef, et al., 2012). Thefunctioning of the basal-ganglia becomes disrupted in Huntington's disease, producing tics anduncontrollable muscle contractions early in the disease and culminating in dementia andpsychosis in the end stages of the illness (Zeef, et al., 2012). The symptoms generally begin toappear in individuals between thirty to fifty years of age (Zeef, et al., 2012). However, thedevelopment can begin at an earlier age (Brooks, et al., 2012). Death usually occurs within tento twenty years from the onset of the disease (Brooks, et al., 2012).Research has shown that Huntington's Disease is caused by a single-dominant, abnormalgene that is linked to the chromosome number-four that increases the dopamine activity in thebasal-ganglia (Brooks, et al., 2012). This defect causes a part of DNA called a CAG repeat, tooccur many more times than it is supposed to (Brooks, et al., 2012). This gene, which producesa protein called Huntington, was discovered in 1993 (Brooks, et al., 2012). If one parent has thedisease, there is a fifty-percent chance that the offspring may inherit the disease (Brooks, et al.,2012). There is a rare case, however, where one can develop the d

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