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Types of Alzheimer’s Disease

Ramin Ansari MD
Medically reviewed by Ramin Ansari
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Ramin Ansari MD
Medically reviewed by Ramin Ansari

Alzheimer’s illness is a progressive neurological condition. Because of it, a person loses his ability to work. The sickness primarily affects memory, cognitive abilities, and the ability to perform daily tasks. It is considered the most common cause of dementia among the elderly. This disorder is often associated with memory impairment, but it manifests itself in different forms and variations. These differences play a crucial role in helping the patient. This helps healthcare providers diagnose and manage illness more effectively. Ultimately, this makes individualized care more accessible for people who struggle with it.

We will delve into various manifestations of the sickness. We will help you learn the main types of Alzheimer’s disease, focusing on their distinctive attributes, manifestations, and potential risk factors.

What is Alzheimer’s Disease?

Alzheimer’s disease is a type of primary dementia of old age. Doctors characterize it as a gradual onset of memory impairment and higher cortical functions. A complex of neuropathological symptoms may also occur.

Unfortunately, this is an incurable sickness. It leads to the impossibility of mental activity and the destruction of the intellect. Most often, it develops in people over 65 years old. However, modern medicine makes it possible to slow down the speed of its development.

Currently, the question remains open: why does Alzheimer’s illness occur? Several theories try to explain the development of the disorder.

Causes of Alzheimer’s disease:

  • hereditary predisposition;
  • atherosclerosis;
  • oxygen deficiency;
  • deposition of beta-amyloid in brain cells;
  • decrease in the level of acetylcholine;
  • chromosomal disorders;
  • specific reactions of immunity;
  • exposure to toxic substances;
  • injuries (psychological, craniocerebral);
  • viruses.

There are different types of Alzheimer’s.

Many researchers include slow depression, high blood pressure, low intelligence, diabetes, etc., as risk factors for the illness.

The first manifestation of Alzheimer’s sickness is a decrease in memory, attention, mental capacity, the ability to form and implement motor skills, etc.

There are three main stages of Alzheimer’s illness – early (mild), middle (moderate), and late (severe). Sometimes, the preclinical stage and the stage of moderate-severe dementia are distinguished separately.

How Many Types of Alzheimer’s Are There?

Types of Alzheimer’s DiseaseWe can classify Alzheimer’s disorder into several main types. But there are two most common classifications. The first classification is divided into two types:

  • Early-onset Alzheimer’s sickness. This type of Alzheimer’s usually occurs in people under the age of 65. Some cases of early-onset Alzheimer’s illness have a genetic component.
  • Late-onset Alzheimer’s disease. It is the most common form and usually affects people over 65. It progresses slowly and is not always associated with a vital genetic component.

In addition to these main types, there are also variations within Alzheimer’s disease. They rely on clinical and pathological signs. They include:

  • Familial Alzheimer’s disorder. This is a rare early-onset form of Alzheimer’s disease. Specific genetic mutations pass it down in families. 
  • Unusual options. Some people with Alzheimer’s illness may show unusual symptoms or patterns of progression.
  • Mild cognitive impairment (MCI). It is a transitional stage in which people notice a decline in cognitive functions. But at the same time, people do not meet the criteria for a complete diagnosis of Alzheimer’s sickness.
  • Mixed dementia. Some people may experience a combination of Alzheimer’s disease and other types of dementia.

It’s important to note that these types and variations can sometimes blur the lines. Alzheimer’s research is ongoing, and how many types of Alzheimer’s are there often depends on them.

Different Types of Alzheimer’s Disease

Elderly person solving a puzzle at a table

Understanding the types of this illness is essential for its prevention. For example, people at risk for a specific type can take timely measures to prevent the sickness. As we have already mentioned, it is impossible to cure it entirely, but if you care for yourself, you can notice it quickly and stop its rapid progress. It is necessary to think about the preventive measures for Alzheimer’s disorder, even at a young age. For this, it is essential to understand the types of Alzheimer’s disease. Some of them occur earlier, some later. One species depends on genetics, and the other does not. Therefore, it is essential to consider all these nuances before taking appropriate measures. The main types of this illness are presented below.

Sporadic Alzheimer’s disease

This is the most common form of the sickness, which accounts for the majority of cases. As a rule, it occurs in people over 65 and has no clear genetic cause.

Scientists have yet to study the exact cause of the sporadic illness thoroughly.  Researchers believe that a complex interaction of genetic, environmental, and lifestyle factors results in it. This is one of the different types of Alzheimer’s, which is the most common.

Familial Alzheimer’s disease (FAD)

FAD is a rare form of the disorder.  Specific genetic mutations inherit it in the family. It usually appears earlier in life, often in the 30s, 40s, or 50s.  Mutations in specific genes cause FAD and lead to the accumulation of amyloid plaques in the brain. 

Alzheimer’s disease in the early stages

This type of illness appears before the age of 65. Early-onset Alzheimer’s sickness can be sporadic. But it is often associated with familial genetic mutations.

Late-onset Alzheimer’s disease

Late-onset Alzheimer’s disorder is the more common form. It usually occurs after 65 years. It is usually not associated with known familial mutations.

Mild Cognitive Impairment (MCI)

Cognitive changes characterize MCI, but they are not severe enough to classify it as Alzheimer’s illness.  Some people with MCI develop Alzheimer’s sickness, while others do not progress further.

Rapidly progressive Alzheimer’s disease

This is a rare and aggressive form of Alzheimer’s disease. It progresses faster than the typical form.  This is associated with a faster cognitive decline and more significant impairment. 

Posterior cortical atrophy (PCA)

PCA is a type of Alzheimer’s illness that mainly affects the back of the brain. This can lead to vision impairment, reading difficulties, and problems with spatial awareness.

Frontotemporal lobar degeneration (FTLD)

FTLD is a group of disorders that affect the frontal and temporal lobes of the brain. It is not classified as Alzheimer’s sickness. However, it has some similarities, including progressive cognitive decline.

It is important to note that the exact cause, progression, and symptoms of Alzheimer’s disorder can vary from person to person. The final diagnosis is often based on a combination of several factors.


In summary, there are many types of Alzheimer’s disease. This illness is a complex neurological disorder. These differences between types of disorder include:

  • forms with early and late onset,
  • family illness
  • atypical options,
  • mild cognitive impairment,
  • mixed dementia
  • rare variants.

They contribute to the diversity of experiences among those affected by the sickness.

Recognizing and distinguishing between these types is essential for healthcare professionals. This helps to establish an accurate diagnosis and correct treatment. For people, knowledge about this is also necessary. They will help prevent or reduce and slow down the disorder’s symptoms. The understanding of Alzheimer’s illness continues to evolve. New research is shedding light on new subtypes and potential treatments.

This disorder is complex and cannot be managed without the help of specialists. Contact Lone Star Neurology Clinic, and we will help you.


How many types of Alzheimer’s Disease are there?

There are several types and varieties of Alzheimer’s disease:

  • early start
  • late start
  • familial, atypical variants,
  • mild cognitive impairment,
  • mixed dementia.

Are the symptoms of all types of Alzheimer’s Disease the same?

Symptoms can vary in different types of Alzheimer’s disease. But some share common traits, such as memory loss and cognitive decline.

How is the specific form of Alzheimer’s Disease diagnosed?

Diagnosis of a specific form of Alzheimer’s disease usually includes:

  • clinical assessment,
  • cognitive testing,
  • medical history review,
  • sometimes brain imaging.

Is there a cure for any form of Alzheimer’s Disease?

There is no specific cure for Alzheimer’s disease. Treatment mainly focuses on managing symptoms and improving the person’s quality of life. Research into possible drugs and effective treatments continues.

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Edward Medina
Edward Medina
15:34 30 Jun 22
Just such an amazing staff that makes you feel like part of their family. I’ve been going there for over 5 years now... and each visit I get the very best care and treatments that I have ever received in the 20+ years that I’ve been dealing with severe debilitating migraines. Since i started seeing them the number of my migraines has dropped from 15-20 a month to 2-3 every 3 month. I highly recommend them …they will change your life!read more
Daneisha Johnson
Daneisha Johnson
22:20 19 May 22
Dr. Askari was very kind and explained everything so I could understand. The other staff were nice as well. I would... have gave 5 stars but I was a little taken aback when I checked in and had to pay 600.00 upfront. I think that should have been discussed in a appointment confirmation call or email just so I could have been more
Jean Cooper
Jean Cooper
16:54 29 Apr 22
I love the office staff they are friendly and very helpful. Dr. JODIE is very caring and understanding to your needs... and wants to help you. I will go back. would recommend Dr. Dr. Jodie to other Patients in a heart beat. The team works well more
Linda M
Linda M
19:40 02 Apr 22
I was obviously stressed, needing to see a neurologist. The staff was so patient and Dr. Ansari was so kind. At one... point he told me to relax, we have time, when I was relaying my history of my condition. That helped ease my stress. I have seen 3 other neurologists and he was the only one who performed any assessment tests on my cognitive and physical skills. At one point I couldn't complete two assessments and got upset and cried. I was told, it's OK. That's why you're here. I was truly impressed, and super pleased with the whole experience!read more
Leslie Durham
Leslie Durham
15:05 01 Apr 22
I've been coming here for about 5 years. The staff are ALWAYS friendly and knowledgeable. The Doctors are the absolute... best!! Jodie Moore is always in such a great mood which is a plus when you are already stressed. Highly recommendedread more
Monica Del Bosque
Monica Del Bosque
14:13 25 Mar 22
Since my first post my thoughts have changed here. It's unfortunate. My doctor and PA were great, but the office staff... is horrible. They never call you back when they say they will, they misinform you, they cause you too much stress wondering what's going on, they don't keep you posted. They never answer the phone. At this point I've left four messages in the last week, and I have sent three messages. Twice from their portal and one direct email. No response. My appointment is on Monday morning at 8:30am, no confirmation on my insurance and what's going on. What the heck is going on, this is ridiculous!I've given up... the stress her office staff has put me through is just not worth it. You can do so much better, please clean house, either change out your office staff, or find a way for them to be more efficient please. You have to do something. This is not how you want to run your practice. It leaves a very bad impression on your more
Ron Buckholz
Ron Buckholz
23:32 23 Mar 22
I was actually pleasantly surprised with this visit! It took me a long time to get the appointment scheduled because no... one answers your phones EVER! After a month, I finally got in, and your staff was warm, friendly, and I was totally impressed! I feel like you will take care of my needs!read more
Steve Nabavi
Steve Nabavi
16:28 16 Mar 22
It was a nice visit. Happy staff doing all they can do to comfort the patients in a very calming environment. You ask... me they are earned a big gold star on the fridge. My only complaint they didn't give me any more
Katie Lewis
Katie Lewis
16:10 10 Feb 22
Had very positive appointments with Jodie and Dr. Sheth for my migraine care. Jodie was so fast with the injections and... has so much valuable info. I started to feel light headed during checkout and the staff was SO helpful—giving me a chair, water, and taking me into a private room until I felt better. Highly recommend this practice for migraine patients, they know what they’re doing!!read more
Joshua Martinez
Joshua Martinez
16:02 10 Dec 21
I was scheduled to be checked and just want to say that the staff was fantastic. They were kind and helpful. I was... asked many questions related to what was going on and not once did I feel as though I was being brushed off. The front desk staff was especially great in assisting me. I'm scheduled to go back for a mri and am glad that I'll be going more
Isabel Ivy
Isabel Ivy
21:42 03 Nov 21
I had such a good experience with Lone Star Neurology, Brent my MRI Tech was so awesome and made sure I was very... comfortable during the appointment. He gave me ear plugs, a pillow, leg support and blanket, easiest MRI ever lol 🤣 My 72 hour EEG nurse Amanda was also so awesome. She made sure I was take care of over the 3 days and took her time with the electrodes to make sure it was comfortable for me! Paige was also a huge help in answering all my questions when it came to my test results, and letting me know her honest opinions about how I should go forth with my more
Leslie Luce
Leslie Luce
17:37 20 Oct 21
The professionalism and want to help attitude of this office was present from the moment I contacted them. The follow... up and follow through as well as their willingness to find a way to schedule my dad was above and beyond. We visited two offices in the same day with the same experience. I am appreciative of this—we spend a lot of time with doctors and this was top notch start to more
robert Parker
robert Parker
16:38 16 Apr 21
I love going to this office. The staff is friendly and helpful. The doctor is great. I am getting the best... neurological tests and treatment I have ever had. The only reason I did not give them a 5 star rating is because it is impossible to reach a live person at the office to reschedule appointments. Every time I have tried to get through to the office it says all people are busy and I am sent to a voicemail. If they could get their phone answering fixed, I would give them a strong 5 more
MaryAnn Hornbaker
MaryAnn Hornbaker
00:26 25 Feb 21
Dr. Harney is an excellent Dr. I found him friendly , personable and thorough. I evidently am an unusual case. ... Therefore he spent a Hugh amount of time educating me. He even gave me literature to further explain my condition and how to follow up. This is something you rarely get from your doctors. So I am more than please with my doctor and his more
Roger Arguello
Roger Arguello
03:05 29 Jan 21
Always courteous, professional. The staff is very friendly and always work with you to find the best appointment time.... The care team has been great. Always taking the time to listen to your concerns and to find the best more
Margaret Rowland
Margaret Rowland
01:12 27 Jan 21
I have been a patient at Lone Star Neurology for several years. Now both my adult daughters also are patients there. I... love Jodie. She is always so prompt whether it is a teleamed call are a visit in the office. She takes the time to explain everything to me and answers all my questions. I am so blessed to have Jodie as my more
Susan Miller
Susan Miller
03:01 13 Jan 21
My husband had an accident 5 years ago and Lone Star Neurology has been such a blessing to us with my husbands care.... Jodie Moore is his provider and she is amazing! Jodie is very knowledgeable, caring, and thorough. She takes her time with you, making sure your needs are met and she is happy to answer any questions you may have. Lone Star Neurology’s patients are very lucky to have Jodie providing their care. Thank you Lone Star Neurology and especially Jodie for everything you have done for us. Jodie, you are the best!read more
Windalyn C
Windalyn C
01:32 09 Jan 21
Jodie is wonderful. She is very caring and knowledgeable. I have been to over a dozen neurologists, and none were able... to help me as much as they have here. Thanks!read more
Katie Kordel
Katie Kordel
00:40 09 Jan 21
Jodi Moore, nurse practitioner, is amazing. I have suffered from frequent, debilitating headaches for almost 20 years.... She has provided the best proactive and responsive care I have ever received. My quality of life has been greatly improved by her caring approach and tenacity in finding more
Ellie Natsis
Ellie Natsis
15:41 07 Jan 21
I have had the best experience at this neurologist's office! For over a year I have been receiving iv treatments here... each month and my nurse, Bobbie is beyond wonderful!! She's so attentive, knowledgeable, caring, and detail oriented. She makes an otherwise uncomfortable experience much more pleasant and definitely puts me at ease! She also helps me with my insurance,ordering this specialty medication and dealing with the ordering process which is no easy feat.Needless to say, she goes above a beyond in every way and I'm so grateful to this office and to Bobbie for all they do for me!read more
Matt Morris
Matt Morris
15:39 07 Jan 21
Let me start by saying that I have been coming here for years. Due to my autoimmune disease, I am in this office... once every three weeks for multiple hours at a time. The office is very clean and the staff very friendly. My only complaint would be there communication via phone. They aren't the best at responding if you leave a voicemail and expect a call back. I understand that this is prob just due to the sheer number of alls they receive daily. What I can say I like the best about the office are the people. Bobby who handles my infusions is great. I never have any issues with her setting up my infusions. She is very quick to reply to messages sent via text and if she were to leave then my whole opinion of the office may change. I also enjoy people like Matt, Lauren, and Jodi. I appreciate all that they do for me and without this team I'm not sure I would be as happy as I am to visit the office as frequently as I have to. Please ensure that these folks are recognized as they are what makes my visit to this office so tolerable :).read more
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