Causes+of+Alzheimer's+Disease

=**Causes of Alzheimer's Disease**=
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Alzheimer's Disease is caused in the brain and it affects the brain as well. The cause is when our brain cells (called neurons) stop working. Unlike other cells in the body, neurons cannot replicate, that means when we lose neurons, they dont grow back. Our brain cells are essential to everyday life and in Alzheimer's Disease, the neurons die and we easily forget how to do everyday tasks such as talking, eating, going to the toilet.

The hippocampus and the cerebral cortex (parts of the brain that control memory) have the highest amount of acetylcholine (a neurotransmitter that allows the neuron to send impulses or messages. They are found on the tips of the axon, and people with AD have extremely low levels of acetylcholine. Faster rate of brain deterioration and neurons dying are caused by the buildup of beta-amyloid deposits (or plaques, like sticky glue that stops neurons from working properly), this disrupts normal brain function. People with AD have as much as 90% lower acetylcholine levels in areas of the brain critical to memory. Neurofibrillary tangles (like a tangle of yarn, except it is microtubules) and beta-amyloid plaques also cause the brain to malfunction and cells to die. Overall, AD is caused by no one thing but a combination: lower levels of acetylcholine, beta-amyloid plaques, and neurofibrillary tangles. All of these cause the irreplaceable brain cells to die.

Here is a simplified diagram of what goes on inside the brain of someone with Alzheimer's and someone without Alzheimers.

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What is the exact one cause that causes Alzeimer's Disease?
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