Disease : Alzheimer 's And Parkinson 's Disease Essay

Alzheimer disease (AD) is the most common cause of dementia in the elderly, accounting for 65–70% of all cases (Jellinger, Janetzky, Attems, & Kienzl, 2008). The other dementias are of the Parkinson 's group, the fronto-temporal group and the vascular group. The total worldwide yearly costs for the treatment and care of patients suffering from dementia are estimated to be around 250 billion US dollars. The lifetime risk for AD between the ages of 65 and 100 is 33% for men and 45% for women with an annual increase of 1–2% in the seventh decade to almost 60% in the 10th decade with doubling every 5 years (Jellinger et al., 2008). AD is incurable, and thus represents a major public health problem. AD represents a challenge to humanity due to its relatively recent discovery, progressive nature of the illness, and complex diagnosis.

James Parkinson first discovered Parkinson's Disease in 1817. Parkinson's Disease is a common neurologic disorder for the elderly. It is a disorder of the brain characterized by shaking and difficulty with walking, movement, and coordination. This disease is associated with damage to a part of the brain that controls muscle movement. Parkinson's Disease is a chronic illness that is still being extensively studied.

Parkinson disease (PD) is one of the most common neurologic disorders. and it affects approximately 1% of individuals older than 60 years old. Parkinson’s disease is a condition that progresses slowly by treatment. In addition, loss of pigmented dopaminergic neurons of the substantianigra pars compacta and the presence of Lewy bodies and Lewyneurites are the two major neuropathologic findings in Parkinson disease (Hauser, 2016).

Alzheimer’s Disease is a disease of the future. With the growing aged population, this disease, which affects primarily the elderly, will become of increasing relevance to the medical profession. Also, the high frequency of Alzheimer’s, and the high cost in labor, money, and material of caring for its victims shall put considerable burden on the society as a whole. Here, however, these issues are not going to be debated. Instead the pathology of Alzheimer’s will be reviewed to the extent it is known today.

Due to the inability of the brain to replace nerve cells, some brain function is lost. The key question in Alzheimer’s disease is, what causes the neuron degeneration (Johnson, 1989)? The focus for finding the cause is on abnormal structures found in the brain of people with Alzheimer’s. Unfortunately, the abnormal structures the brain undergoes still has researchers uncertain as to how they are involved in Alzheimer’s and exactly how the disease occurs.

The call came at 9:05 p.m. on January 20, 2004. Mom had just finished telling the news about the girl's grandfather. He had Alzheimer's Disease and was not doing well at all. The ruling was that he probably would not make it through the night. She knew exactly what the news was the moment her mom said, "No." After the news came, the decision was made they would leave the next day to attend the funeral.

Even today, after so much study, Alzheimer’s is not fully understood. However, researchers do agree that this degenerative disease is caused by the gradual buildup of fibrous protein compounds in the brain, which are known in the scientific world as amyloids. These amyloids in the brain area act like plaque and as a result of their presence, the normal brain functioning is disrupted.

According to aggregation kinetics, the rate of aggregation formation is dependent upon the amount of polyglutamine polypeptides. Aggregates in Huntington’s disease are formed from the mutant huntingtin fragments when the protein is cleaved at the N-terminal. This occurs after a conformation change into a β-sheet conformation. Huntingtin is cleaved by caspase, known for apoptosis, and calpain. Cleavage at caspase-3 sites and inhibited cleavage caspase-6 sites did not produce Huntington’s disease characteristics. Mutant huntingtin proteins contain more active calpains because of the increase in neurotransmitter – glutamate – release, enhancing NMDA-receptor activity. An increased glutamate level on spiny neurons was found to increase apoptosis in nerve cells. There are currently no treatment or cures for Huntington’s disease. However, new therapy ideas are centered on the inhibition of proteolytic cleavage.

Parkinson disease (PD), also referred to as Parkinson’s disease and paralysis agitans, is a progressive neurodegenerative disease that is the third most common neurologic disorder of older adults. It is a debilitating disease affecting motor ability and is characterized by four cardinal symptoms: tremor rigidity, bradykinesia or kinesis (slow movement/no movement), and postural instability. Most people have primary, or idiopathic, disease. A few patients have secondary parkinsonian symptoms from conditions such as brain tumors and certain anti-psychotic drugs.

Alzheimer’s disease is a degenerative brain disease that is seen in the elderly. It is the most common form of dementia, which is a general term for memory loss and other intellectual abilities serious enough to interfere with daily life (Alzheimer’s Disease & Dementia). Alzheimer’s is one of the leading causes of death in America. Dementia and Alzheimer’s have been around for centuries, but Alzheimer’s disease wasn’t first described until 1906 by Dr. Aloysius Alzheimer. In the past, there was a stigma for elderly people with the disease and people with dementia and Alzheimer’s were seen as a burden on society. Society has only recently accepted and cared for people with the disorder. There are now treatments and research being done for dementia and Alzheimer’s, but no cure remains and many individuals still suffer from the disease. Future treatments for the disease include taking aim at significant aspects of the disease like fighting beta-amyloid plaques, recruiting the immune system, reducing brain cell inflammation, and studying the heart-head connection (Alzheimer’s Treatments: What’s on the Horizon?). There are other ways to possibly treat the disease in the future as well. Hopefully from looking at the history of the disease, how the disease affects the brain and body, and future treatments, Alzheimer’s disease and dementia will be a thing of the past.

The causes of Alzheimer’s are not yet fully understood; however, its effect on the brain can be understood. Alzheimer’s disease - insidious, attacking and terrifying - stalks and then murders brain cells. A brain afflicted with Alzheimer’s disease has a decreased count in cells and connections among cells. The more brain cells die, the smaller the brain of a person with Alzheimer’s gets. When doctors examine a brain with Alzheimer’s tissue, they see two types of deformities that are known to be trademarks of the disease. The first trademark is known as plaque, which is a cluster of a beta-amyloid protein that may damage and kill brain cells in a number of ways, including blocking with cell-to-cell communication. Whereas the final cause of brain-cell death in Alzheimer’s remains a mystery, the groups of beta-amyloids that cover the brain cells are a sure sign of the disease. The second trademark of Alzheimer’s is the tangle. Brain cells are reliant on internal support and a transport system to bring nutrients and other essentials to their distant regions. This system needs a protein called tau. In Alzheimer’s, strings of tau protein roll into abnormal tangles inside brain cells, concluding in failure of the cell's transport system. This breakdown of the system is powerfully involved in the decline and death of brain

Parkinson’s Disease is a long-term progressive neurodegenerative disease consisting of motor system impairment, neuropsychiatric, and nonmotor features. The disease is characterized by the following key clinical features: bradykinesia, resting tremor, postural instability, and rigidity. These symptoms are due to the diminishing of dopamine in the nigrostriatal pathway and substantia nigra, which causes inhibition of the thalamus decreasing excitatory input to the motor cortex.1 Along with the key manifestations an individual with Parkinson’s Disease will experience problems associated with the disease or the antiparkinson medications. These co-occurring problems are hallucinations, dementia, daytime sleepiness, fatigue, depression, and pyschosis.2 Psychosis is a common problem in Parkinson’s Disease, and is characterized by paranoid delusions and hallucinations that are visual in nature.2 Risk factors for psychosis consists of advancing age, dementia, sleep disorders, and high doses of antiparkinson drugs.1

Nowadays, one of the most prevalent diseases is considered to be the neurodegenerative disorders because of increased life expectancy and population’s growth. With the term neurodegeneration is characterized the process of the nervous system, in which there is a progressive loss of structure and functions of neuronal cells. Neurodegenerative disorders are, also, defined as hereditary, incurable and debilitating conditions. The most common neurodegenerative diseases are Alzheimer and Parkinson. Both of these diseases are late-onset and many individuals believe that there is a relationship between them. The present essay emphasizes on the description of Alzheimer’s and Parkinson’s disease as well as the comparison and the contrast of the biological

Parkinson’s Disease is known as one of the most common progressive and chronic neurodegenerative disorders. It belongs to a group of conditions known as movement disorders. Parkinson disease is a component of hypokinetic disorder because it causes a decreased in bodily movement. It affects people who are usually over the age of 50. It can impair an individual motor as well as non-motor function. Some of the primary symptoms of Parkinson’s disease are characterized by tremors or trembling in hands, legs and arms. In early symptoms the tremor can be unilateral, appearing in one side of body but progression in the disease can cause it to spread to both sides; rigidity or a resistant to movement affects most people with Parkinson’s disease,

Alzheimer is a disease that affects the elderly most. The disease was discovered by Dr. Alois Alzheimer in the year 1906 when he was examining a female’s brain. He found out that the woman displayed memory loss, language problems and some inexplicable changes in behavior. The disease was named after the doctor who was a German psychiatrist and a neuropathologist. Alzheimer’s disease is a degenerative brain disorder that leads to memory loss, personality changes, and language problems (Gilbert & Julie 2). The disease is mostly diagnosed in people over the age of 65 years, though there is a small minority of people under the age of 50 who get the disease. Studies show that 1% of a whole population aged between the ages 65-75 have severe