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Alzheimer's Disease - Journal of Neurology and Clinical Neuroscience

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Alzheimer's Disease - Journal of Neurology and Clinical Neuroscience

Overview


Alzheimer's disease is a neurologic degenerative disorder that causes the brain to shrink and brain cells to die. Alzheimer's disease is the most common form of dementia, which is defined by a continuous decline in mental, behavioral, and social abilities and reduces a person's ability to operate independently.


5.8 million Americans over the age of 65 suffer from Alzheimer's disease. They range in age from 75 and older by 80%. It is believed that Alzheimer's disease affects between 60% and 70% of the estimated 50 million dementia sufferers worldwide.


As Alzheimer's disease progresses, a person will have severe memory loss and lose their ability to perform fundamental tasks. With medicine, symptoms may temporarily improve or develop more slowly. These treatments can occasionally help people with Alzheimer's disease preserve their independence and perform at their best. The people who have Alzheimer's disease and those who care for them can access a wide range of services and programmes. As of right now, there is no drug for Alzheimer's that can halt the disease's progression in the brain. Extremely advanced stages of the condition might result in mortality from major loss of brain function-related issues like dehydration, hunger, or infection.


Symptoms of Alzheimer's


Memory Loss


A person may have trouble recalling things and absorbing new information.


  • Losing things
  • Not remembering appointments or events
  • Wandering or being disoriented


Deficits in Cognition


A person could have trouble using logic, finishing challenging tasks, or coming to decisions. This could lead to:


  • A decreased awareness of risks and dangers
  • Experiencing money or payment problems
  • Difficulties in making decisions
  • Difficulty completing tasks that require several steps, like getting dressed


Recognition Issues


A person may lose the ability to utilize simple tools or recognize faces or objects. These problems are not the result of vision issues.


Spatial Awareness Issues


It might cause a person to lose their balance, trip over items more frequently, spill things or have trouble dressing by aligning garments to their body.


Speaking, Reading, or Writing Issues


One can have problems recalling familiar words, or they might make more blunders when speaking, spelling, or writing.


Changes in Personality or Behavior


Some examples of personality and behavior changes. 


  • Becoming more likely than previously to get irritated, furious, or worried.
  • A decline in drive or interest in activities they often find enjoyable.
  • A decline in empathy.
  • Compulsions, obsessions, or inappropriate social behavior.


Causes


Proteins no longer function normally. This obstructs the injured brain cells' ability to function and starts a toxic cascade that ultimately leads to cell death and later brain shrinkage.


Current ideas propose that amyloid beta (A) abnormally accumulates in the brain, either extracellularly as tau and amyloid plaques or intracellularly as neurofibrillary tangles, interfering with neuronal communication and function. This decreased ability to remove proteins is impacted by aging, regulated by brain cholesterol, and connected to other neurodegenerative diseases. Thanks to breakthroughs in brain imaging technology, researchers can now monitor changes in brain structure and function as well as the formation and spread of abnormal tau and amyloid proteins in the living brain. 


These fragments have a harmful effect on neurons when they join together, affecting cell-to-cell communication. As a result, amyloid plaques—larger deposits—continue to grow. As part of their internal support and transport system, proteins are responsible for transporting nutrients and other essential components inside neurons. Tau proteins, which take on aberrant forms as a result of Alzheimer's disease, make up neurofibrillary tangles. The tangles damage the transport system and poison cells. The cause of the bulk of Alzheimer's cases is still completely unknown, with the exception of 1% to 2% of cases where deterministic genetic changes have been found. The cholinergic hypothesis and the amyloid beta (A) hypothesis, which both attempt to explain the underlying etiology, are the two most widely accepted hypotheses.


The oldest idea and the basis for most pharmacological treatments is the cholinergic hypothesis, which claims that the neurotransmitter acetylcholine's decreased production is what causes Alzheimer's disease. Loss of cholinergic neurons, seen in the limbic system and cerebral cortex, is one of the primary features of Alzheimer's disease progression. In the 1991 amyloid hypothesis, the extracellular amyloid beta (A) deposits were recommended as the disease's main cause. This concept is supported by the location of the amyloid precursor protein (APP) gene on chromosome 21 and the fact that people with trisomy 21 (Down syndrome), who have an extra gene copy, nearly always exhibit at least the initial symptoms of Alzheimer's disease by the age of 40. Apolipoprotein isoform APOE4 in particular is a substantial hereditary risk factor for Alzheimer's disease. While apolipoproteins promote the breakdown of beta-amyloid, some isoforms (such as APOE4) are less efficient at this process, resulting in an excessive buildup of amyloid in the brain.


Prevention


Since there are no medications that can be used to treat Alzheimer's disease, research has focused on ways to inhibit the illness's onset and progression. There is no proof to support any one treatment in avoiding the disease, and studies on ways to block the onset or progression of Alzheimer's have had inconsistent results. Epidemiological studies have found a connection between changeable factors including medications, lifestyle choices, and nutrition, and a person's risk of developing AD. Evaluation of whether Alzheimer's disease therapies are effective as a primary prevention technique, preventing the disease itself, or a secondary prevention method, identifying the disease in its early stages, presents certain challenges.


Journal of Neurology and Clinical Neuroscience is a peer-reviewed, academic International journal that provides a platform for academics, laypeople, medical professionals, and students who are eager to contribute their results in this area. The current diagnosis and management of neurological illnesses are welcome contributions to this journal from neurologists.


Submission link: https://www.pulsus.com/submissions/neurology-clinical-neuroscience.html



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