World Alzheimer’s Day 2025: What Is Alzheimer’s Disease And How Does It Affect The Brain

World Alzheimer’s Day 2025 raises awareness about Alzheimer’s disease, a brain disorder that affects memory, thinking, and daily life. Learn its causes, symptoms, impact, and why early detection is important.

World Alzheimer’s Day is celebrated on September 21 every year, whereby the critical challenges of Alzheimer’s disease, which is a phenomenon that slowly kills memory, the ability to think, and even the most essential daily skills, are brought to light.The most prevalent type of dementia is Alzheimer which is being experienced by millions of individuals living all over the world.It is important to know what it is and the impact it has on the brain is not only essential to patients, but also to families and others who visibly support them.

What Is Alzheimer’s Disease?

Alzheimer’s disease is a brain disease, which is a progressive one and wastes away as time goes by. It typically begins with less severe memory loss, as the person loses conversation since he or she had just been talking with someone or even misses some common objects of his or her daily routine. With disease progression, an individual can experience some difficulty in recognising familiar faces and decision-making or other basic functions such as dressing or eating.

It is not an ordinary experience through ageing, yet age is the most considerable risk factor. The majority of individuals who are diagnosed with Alzheimer’s in the patients are aged above 65. But younger individuals are not deprived of developing it, or so-called early-onset Alzheimer’s disease.

How Does Alzheimer’s Affect the Brain?

The brain is a complicated organ that has billions of nerve cells, or neurones, that interact with each other. These brain cells are damaged and die in cases of Alzheimer’s disease, leading to a shrinking of the brains of the patients.

The brains of individuals affected with Alzheimer’s go through two key changes:

Plaques These are irregular piles of a protein known as beta-amyloid accumulated between the cells of the brain. They are anti-communicatory and interfere with the functions of the brain.
Tangles Within the brain cells, tau is another protein which twists itself in irregular shapes, which form tangles. These entanglements destroy the transport network within these cells, also indicating that it becomes hard when nutrients and signals need to pass.

In time, the disease results in other parts of the brain being affected: language, reasoning and behaviour. As the disease advances, the brain decreases considerably in size, and the sufferer may not be in a position to walk, speak, or identify others that he or she loves.

Symptoms of Alzheimer’s Disease

These symptoms pervade individuals, although some of the most prevalent symptoms are:

Losing knowledge of things that occurred recently or discussions.
hesitancy in word locution or direction in conversation
Difficulty solving problems or making decisions.
Losing directions on the day of familiarity.
Change in mood, e.g., confusion, anxiety or aggression.
He has trouble performing day-to-day activities, such as cooking, paying bills or dressing.

Why Awareness Matters?

Alzheimer’s disease not only impacts the patient, but it also has profound effects on both families and the people taking care of the patient. Being a carer to an individual with Alzheimer’s may be a hectic task physiologically, emotionally, and economically. That is why World Alzheimer’s Day serves to remind us of the significant role of systems of support, diagnosis, and awareness of the issue.

The symptoms can be dealt with through treatments, lifestyle changes, and proper care that is known to be effective with the help of early detection. There is no cure so far; however, research is proceeding, and scientists are struggling to discover a new treatment so that they can slow down the disease or even prevent it.