Are Alzheimer’s and Dementia the Same Thing?
If you have ever heard about brain disorders like Alzheimer’s disease or dementia, you would definitely have doubts concerning their connection to each other.
Alzheimer’s disease and dementia are not the same thing. Dementia is a general term for problems with memory, thinking, reasoning, and everyday functioning, while Alzheimer’s disease is a specific brain disease and the most common cause of dementia. (Alzheimer’s Association)
Alzheimer’s disease cannot currently be cured, but treatment and support can help manage some symptoms and make daily life easier. This is why it is important to get a proper medical evaluation when you notice significant changes in memory, thinking, or behavior.
Both Alzheimer’s and dementia are related to memory and thinking problems, but there are several other diseases and medical conditions that can cause these changes.
So how do you tell if the symptoms point to Alzheimer’s disease or something else?
Dementia is a collection of symptoms caused by different diseases or conditions that affect the brain. It is an umbrella term, and Alzheimer’s disease falls under it along with conditions such as vascular dementia and dementia with Lewy bodies. (Alzheimer’s Association)
A lot of conditions can cause dementia, giving an appearance that may look like Alzheimer’s disease.
Your loved one might act like they have Alzheimer’s disease, but don’t jump to any conclusions until they have been properly evaluated and diagnosed.
The confusion arises due to the fact that symptoms of dementia can be a lot similar to those seen in Alzheimer’s disease—memory problems, difficulty concentrating, depression, changes in social behavior, and difficulty completing familiar tasks.
A proper medical evaluation is the best way to determine what may be causing these changes.
Let’s Look At A Few Conditions That Can Cause Dementia Or Similar Cognitive Symptoms
Huntington’s Disease
Huntington’s disease is a genetic neurodegenerative disorder that affects movement, thinking, behavior, and mental health.
It is caused by a disease-causing expansion in the HTT gene and is inherited in an autosomal dominant pattern. If a parent has a full-penetrance disease-causing HTT expansion, each child has a 50% chance of inheriting that expansion. (GeneReviews: Huntington Disease)
I would make one correction to the way this was explained in the original article.
A person who inherits a disease-causing Huntington’s disease expansion does not necessarily start showing symptoms immediately. Huntington’s disease usually begins in adulthood, and the average age of onset is around 40 to 50 years, although symptoms can begin earlier or later. (GeneReviews: Huntington Disease)
Genetic testing can determine whether a person carries an HTT expansion, but it cannot tell exactly when symptoms will begin.
Early symptoms can include clumsiness, changes in coordination, difficulty with planning, irritability, depression, anxiety, apathy, and subtle involuntary movements. As the disease progresses, problems with movement, speech, swallowing, thinking, and everyday activities can become more pronounced. (GeneReviews: Huntington Disease)
Huntington’s disease can also affect a person’s ability to organize and complete everyday tasks.
A person may have trouble planning the steps involved in cooking a meal, getting dressed, managing finances, or completing other familiar activities.
This can sometimes look like dementia, especially when cognitive symptoms become more noticeable.
But Huntington’s disease has its own pattern of motor, cognitive, and psychiatric symptoms, which is why a proper neurological evaluation is important.
Pick’s Disease And Frontotemporal Dementia
This section needs some updating because the term “Pick’s disease” is no longer used as broadly as it once was.
Arnold Pick was a neurologist who described a form of progressive language and behavioral decline in the late 19th century. Today, many of the conditions that were historically called Pick’s disease are discussed under the broader group of frontotemporal disorders or frontotemporal dementia (FTD). (National Institute on Aging)
Frontotemporal dementia is different from Alzheimer’s disease because it often begins with changes in behavior, personality, judgment, or language rather than memory loss being the first major problem.
For example, a person may suddenly behave in socially inappropriate ways, lose interest in things they previously cared about, become unusually impulsive, or have difficulty finding and using words.
Some people with FTD develop changes in eating behavior, poor judgment, reduced empathy, or problems with personal hygiene.
As the condition progresses, memory and other thinking abilities can also become affected, which is one reason why it can sometimes be confused with Alzheimer’s disease.
FTD can be difficult to diagnose because its symptoms can resemble other neurological or psychiatric conditions. Doctors may use medical history, neurological examination, cognitive testing, brain imaging, laboratory tests, and sometimes genetic testing to help determine the cause. (National Institute on Aging)
Vascular Dementia
Vascular dementia is another major cause of dementia.
It happens when problems with blood vessels reduce blood flow to the brain and damage brain tissue.
Strokes are one possible cause, but vascular cognitive impairment can also develop from smaller blood vessel disease and other types of damage to the brain’s blood supply. (National Institute on Aging)
The symptoms can vary depending on which parts of the brain have been damaged.
A person may experience problems with planning, attention, reasoning, memory, walking, or other abilities.
Unlike Alzheimer’s disease, where memory problems are often a major early feature, vascular dementia may show more noticeable problems with thinking speed, planning, attention, and organization.
However, the two conditions can occur together.
In fact, Alzheimer’s disease and vascular brain changes are commonly found together in older adults. This is why it is not always useful to think of dementia as one disease versus another.
High blood pressure, diabetes, high cholesterol, smoking, and other cardiovascular risk factors can increase the risk of vascular cognitive impairment and dementia. Managing these conditions can therefore be an important part of reducing the risk of further vascular brain injury. (National Institute on Aging)
Alzheimer’s Disease Is The Most Common Cause Of Dementia
Now that we have looked at some other conditions, let’s come back to Alzheimer’s disease.
Alzheimer’s disease is a specific progressive brain disease.
It is the most common cause of dementia, but it is not the same thing as dementia. (Alzheimer’s Association)
In Alzheimer’s disease, changes in the brain gradually damage nerve cells and their connections.
Memory problems are often one of the earliest noticeable symptoms, especially difficulty remembering recently learned information. As the disease progresses, problems with language, reasoning, judgment, orientation, and everyday activities can become more pronounced.
This is why the words “Alzheimer’s” and “dementia” are sometimes used as if they mean the same thing.
They don’t.
Think of dementia as a broad category of symptoms, while Alzheimer’s disease is one specific disease that can cause those symptoms.
Can A Doctor Tell If It Is Alzheimer’s Disease Or Another Type Of Dementia?
A doctor can often narrow down the likely cause, but there is not always one simple test that immediately gives the answer.
The evaluation may include a medical history, physical and neurological examination, cognitive testing, medication review, laboratory tests, and brain imaging.
Depending on the situation, doctors may also use specialized testing, including biomarkers or genetic testing, to help determine the underlying disease.
This is especially important because some conditions can cause memory and thinking problems that are potentially treatable or reversible.
For example, certain medications, vitamin deficiencies, thyroid problems, depression, sleep problems, infections, and other medical conditions can contribute to cognitive problems.
That is why I would not assume that every person experiencing memory loss has Alzheimer’s disease.
Conclusion
Don’t go on wondering if Alzheimer’s disease and dementia are the same things or not.
They are not.
Dementia is a general term describing problems with memory, thinking, reasoning, and everyday functioning. Alzheimer’s disease is one specific brain disease and the most common cause of dementia.
Other conditions, including vascular dementia, frontotemporal dementia, dementia with Lewy bodies, and some neurological diseases such as Huntington’s disease, can cause cognitive problems that may look similar to Alzheimer’s disease.
So if your loved one is experiencing memory loss or changes in thinking or behavior, don’t try to diagnose the condition yourself.
Get a proper medical evaluation.
Finding the actual cause is the first step toward getting the right treatment, support, and care.
