World Alzheimer’s Month: Separating Alzheimer’s Disease From Other Forms of Dementia

Alzheimer’s disease is the most common cause of dementia, yet it is frequently misunderstood, misidentified, and sometimes confused with other neurological conditions that affect memory and cognition. For families in Westchester, NY, and the greater New York City area navigating a new or suspected diagnosis, understanding what Alzheimer’s disease is, how it differs from other forms of dementia, and when to seek a specialist can make a meaningful difference in care planning and quality of life.

September is World Alzheimer’s Month, making this an especially timely moment to address those distinctions with clarity and compassion. To speak with a board-certified neurologist, contact Chester Neurology today.

What Is Alzheimer’s Disease and How Does It Differ from Other Dementias?

Alzheimer’s disease is a progressive neurodegenerative condition characterized by the accumulation of amyloid plaques and tau tangles in the brain, leading to the gradual loss of neurons and synaptic connections. It accounts for an estimated 60 to 80 percent of all dementia cases, according to the Alzheimer’s Association, yet dementia itself is an umbrella term, not a single disease.

Several other conditions can produce dementia-like symptoms, and distinguishing between them requires careful clinical evaluation:

Vascular Dementia

Caused by reduced blood flow to the brain, often following strokes or small vessel disease. Cognitive decline may appear more stepwise rather than gradual, and symptoms may include slowed thinking and difficulty with planning rather than the memory-first pattern more typical of Alzheimer’s disease.

Lewy Body Dementia

Associated with abnormal deposits of a protein called alpha-synuclein, Lewy body dementia may present with visual hallucinations, fluctuating alertness, and movement changes that overlap with Parkinson’s disease care in NYC. Its early symptom profile can look quite different from Alzheimer’s.

Normal Pressure Hydrocephalus

A treatable condition involving excess cerebrospinal fluid, normal pressure hydrocephalus is notable because it can mimic dementia but may respond well to intervention. The classic triad includes gait disturbance, urinary incontinence, and cognitive changes.

Accurate differentiation matters because each condition may have a distinct trajectory, prognosis, and care approach. In our practice, we find that families often arrive having heard only the word “dementia” without clarity on the underlying cause, which can delay appropriate planning and support.

Recognizing the Early Signs of Alzheimer’s Disease in Westchester, NY

Early identification of Alzheimer’s disease is one of the most valuable steps a patient or family can take. Research suggests that engaging with a specialist during the earlier stages of cognitive change may support better care coordination and access to emerging treatment options.

Common early indicators that warrant a neurological evaluation include:

Memory Changes Beyond Normal Aging

Forgetting recently learned information, asking the same questions repeatedly, or increasingly relying on memory aids in ways that represent a clear change from prior function. Normal aging may involve slower recall; Alzheimer’s disease may involve forgetting the information entirely.

Difficulty with Complex Tasks

Struggling to follow familiar recipes, manage finances, or plan multi-step activities can reflect changes in executive function associated with Alzheimer’s disease progression.

Language and Orientation Changes

Word-finding difficulties, confusion about dates or locations, and misidentifying familiar people are symptoms that should be evaluated by a neurologist rather than attributed to stress or aging alone.

It is equally important to consider conditions that can mimic Alzheimer’s disease: thyroid dysfunction, vitamin deficiencies, medication interactions, depression, and sleep disorders may all affect cognition. Comprehensive neurological diagnostics, which may include detailed clinical history, cognitive testing, and imaging, can help clarify the picture. Patients concerned about memory changes in Westchester, NY, are encouraged to consult an Alzheimer’s specialist in NYC at Chester Neurology for a thorough evaluation. If headache or sleep symptoms are also present, our practice offers integrated care including migraine treatment in NYC and related neurological concerns.

Alzheimer’s Disease Diagnosis and the Role of the Neurologist

Diagnosing Alzheimer’s disease is not a single-test process. It is a clinical determination made after ruling out other causes and synthesizing information from multiple sources. A neurologist with expertise in cognitive and memory disorders plays a central role in this process.

At Chester Neurology, the diagnostic process may include a detailed neurological examination, cognitive assessments, laboratory work to exclude reversible causes, and referral for neuroimaging when indicated. For patients whose presentations are more complex, additional diagnostic tools may be considered.

The Importance of Specialist-Led Care

A neurologist with a specific background in dementia and Alzheimer’s disease is positioned to identify subtle distinctions between conditions, interpret diagnostic findings in context, and guide families through the stages of care with informed, compassionate support. This is particularly important in cases where symptoms overlap with other neurological conditions seen in our practice, including other forms of dementia or movement disorders in NYC.

What to Bring to Your First Consultation

Families preparing for an initial neurology visit can strengthen the evaluation by documenting the timeline of changes observed, bringing a list of all current medications, and, when possible, having a family member or caregiver present who can share observations the patient may not recall accurately. These details meaningfully inform the diagnostic process.

Our team understands that the period between noticing a concern and receiving a clear diagnosis can be one of the most stressful phases for families. We approach every consultation with the intent to provide clarity, not just clinical findings.

Why Choose Chester Neurology for Alzheimer’s Disease Care in Westchester, NY?

Dr. Roshni Karnani is a neurologist board-certified by the American Board of Psychiatry and Neurology, with deep clinical expertise in Alzheimer’s disease, dementia, and the full spectrum of cognitive and neurological conditions. She completed her neurology residency at Westchester Medical Center and her undergraduate studies at Barnard College, Columbia University, bringing both rigorous academic training and meaningful regional ties to her patients in Westchester, NY, and New York City.

Recognized as a Castle Connolly Top Doctor, Dr. Karnani serves patients across three convenient locations: Rye Brook, Yonkers, and New York City. She is also recognized by New York Magazine. Her practice reflects a commitment to expert neurological care delivered with genuine compassion, and she sees patients in both English and Spanish, an important distinction for the diverse communities of Westchester and the greater metropolitan area.

Chester Neurology offers neurology consultations and diagnostics, TMS Therapy, and SPRAVATO REMS-certified treatment for eligible patients, providing a clinically comprehensive environment for complex neurological and mental health needs. Families facing an Alzheimer’s diagnosis deserve a neurologist who combines extensive experience in the field with the kind of patient warmth that makes difficult conversations possible.

Frequently Asked Questions

Is Alzheimer’s disease the same as dementia?

Alzheimer’s disease is the most common cause of dementia, but the two terms are not interchangeable. Dementia is a clinical syndrome describing a decline in memory and other cognitive functions that interferes with daily life. Alzheimer’s disease is one specific disease that produces dementia. Other causes include vascular dementia, Lewy body dementia, and normal pressure hydrocephalus, each with distinct features and implications for care.

At what age should someone be evaluated for Alzheimer’s disease?

While Alzheimer’s disease most commonly affects people over age 65, early-onset Alzheimer’s can occur in people in their 40s and 50s. Any age group experiencing meaningful, progressive cognitive changes that differ from their prior baseline should consider a neurological consultation. Early evaluation may support better care planning and access to appropriate resources. Contact Chester Neurology to schedule an assessment.

Can Alzheimer’s disease be confused with other conditions?

Yes. Depression, thyroid disorders, vitamin B12 deficiency, medication side effects, and sleep disorders can all produce cognitive symptoms that resemble early Alzheimer’s disease. A thorough neurological evaluation, including laboratory testing and detailed history, can help distinguish Alzheimer’s from potentially reversible causes. This is one reason specialist-led diagnosis is valuable rather than relying on general assessments alone.

Does Chester Neurology see patients from outside Westchester NY?

Yes. Chester Neurology serves patients from across the greater New York metropolitan area, with offices in Rye Brook, Yonkers, and New York City. Dr. Karnani’s background and board certification attract patients seeking specialist-level neurological care for complex conditions including Alzheimer’s disease, dementia, and related memory concerns. Prospective patients are welcome to call to discuss the best location for their needs. Individual results may vary.

What happens during a neurology consultation for memory concerns?

A first consultation for memory or cognitive concerns at Chester Neurology typically involves a detailed clinical history, a neurological examination, and cognitive screening. Dr. Karnani may recommend additional testing, such as laboratory work or imaging, based on initial findings. The goal is to provide a clear, informed picture of what may be contributing to symptoms and to outline a thoughtful path forward for the patient and family.

Schedule a Consultation for Alzheimer’s Disease Care in Westchester, NY

If you or a loved one are experiencing cognitive changes and are seeking answers from a board-certified specialist, Chester Neurology is here to help. Dr. Karnani brings extensive experience in Alzheimer’s disease and dementia care to patients throughout Westchester, NY, and New York City. Contact us to schedule your consultation at a location convenient to you.