Dementia and Cognitive Decline -- Evaluation and Support

What Is Dementia?

Dementia is not a single disease -- it's an umbrella term for a decline in cognitive function severe enough to interfere with daily life. It affects memory, thinking, orientation, judgment, language, and the ability to perform everyday tasks. While some cognitive slowing is a normal part of aging, dementia goes far beyond occasional forgetfulness. When your father can't remember how to drive home from the store he's visited for 20 years, or when your mother starts confusing her children's names with their grandchildren's -- that's not normal aging. That's a signal that something in the brain has changed.

Dementia is caused by damage to brain cells that interferes with their ability to communicate. Different types of dementia affect different brain regions, which is why symptoms vary depending on the specific diagnosis. Alzheimer's disease is the most common cause, accounting for 60-80% of cases, but vascular dementia, Lewy body dementia, and frontotemporal dementia each have distinct presentations and treatment considerations.

A daughter from San Diego called our office asking for help with her 72-year-old mother, a retired schoolteacher who lived alone in Tijuana. Over the past year, the mother had been forgetting to pay bills, leaving the stove on, and getting disoriented on familiar streets. Her primary care doctor attributed it to "normal aging" and prescribed vitamins. When I evaluated her, cognitive testing revealed moderate Alzheimer's disease -- a diagnosis that, while difficult to hear, allowed us to start appropriate medication, involve the family in safety planning, and connect them with caregiver resources. The daughter later told me, "We lost a year thinking this was just old age. I wish we'd come sooner."

Worldwide, over 55 million people live with dementia, and nearly 10 million new cases are diagnosed every year. In the United States alone, 6.9 million Americans aged 65 and older have Alzheimer's disease. Early diagnosis doesn't cure dementia, but it does change everything: it allows families to plan, access treatments that can slow progression, and maximize quality of life in the years ahead.

Signs and Symptoms of Dementia

The early signs of dementia are often subtle and easy to dismiss. Families frequently look back and recognize warning signs that they attributed to stress, depression, or just "getting older." Here are the key domains affected:

A critical distinction: normal aging might mean occasionally forgetting where you put your glasses. Dementia means forgetting what glasses are for. If you're noticing a pattern of cognitive changes in a loved one that goes beyond occasional forgetfulness -- especially if it's getting worse over time -- a professional evaluation is the responsible next step.

Understanding Different Forms of Dementia

Identifying the specific type of dementia is essential because each has different progression patterns, treatment responses, and care needs. Click any card to learn more:

Causes and Risk Factors

Dementia results from damage to or loss of nerve cells and their connections in the brain. The specific cause depends on the type of dementia:

Alzheimer's Disease

Caused by abnormal accumulation of proteins in the brain -- amyloid plaques outside cells and tau tangles inside cells. These deposits interfere with cell communication and eventually cause cell death. The process begins years or even decades before symptoms appear.

Vascular Factors

Strokes, chronic hypertension, diabetes, and cardiovascular disease can all reduce blood flow to the brain, causing vascular dementia. This is particularly relevant in our patient population -- Hispanics and Latinos have higher rates of diabetes and hypertension, both major risk factors for vascular cognitive decline.

Modifiable Risk Factors

Research has identified several risk factors that can be addressed to reduce dementia risk or slow progression: uncontrolled hypertension, diabetes, obesity, physical inactivity, smoking, excessive alcohol use, social isolation, untreated depression, and hearing loss. Addressing these won't prevent all dementia, but it can delay onset by years and slow progression significantly.

Non-Modifiable Risk Factors

Age is the strongest risk factor -- the risk doubles every five years after age 65. Genetics play a role, particularly the APOE-e4 gene variant which increases Alzheimer's risk. Family history of dementia also increases risk, though having a relative with dementia doesn't mean you'll develop it.

Diagnosis and Evaluation

Diagnosing dementia requires more than a brief office visit. It's essential to determine not just whether dementia is present, but which type -- because the treatment, prognosis, and care planning differ for each.

What to Expect in the First Visit

Comprehensive clinical interview (60 minutes). I'll speak with both the patient and a family member who knows them well. I'll ask about the timeline of changes, which cognitive domains are affected, how daily functioning has been impacted, and what medications and medical conditions are present.

Cognitive screening. I use validated tools such as the Montreal Cognitive Assessment (MoCA) and the Mini-Mental State Examination (MMSE) to assess memory, attention, language, visuospatial function, and executive function. These give us an objective baseline and help track changes over time.

Ruling out reversible causes. This is critical. Several treatable conditions can mimic dementia: vitamin B12 deficiency, thyroid disease, depression (pseudodementia), medication side effects, normal pressure hydrocephalus, and urinary tract infections in the elderly. If these haven't been evaluated, I'll recommend appropriate testing.

Behavioral and psychiatric assessment. Many dementia patients develop behavioral symptoms -- agitation, paranoia, depression, sleep disturbance, hallucinations -- that cause more distress to families than the memory loss itself. Identifying and treating these is a core part of psychiatric dementia care.

I'm honest with families about what a psychiatric evaluation provides and what it doesn't. I offer clinical diagnosis, cognitive screening, medication management, and behavioral symptom treatment. For formal neuropsychological testing or brain imaging, I coordinate with neurologists and neuroimaging centers as needed.

Treatment and Management

There is currently no cure for most forms of dementia. But that doesn't mean nothing can be done. Treatment focuses on slowing progression, managing symptoms, maximizing quality of life, and supporting caregivers.

Cognitive Medications

Cholinesterase inhibitors (donepezil, rivastigmine, galantamine) are the mainstay of treatment for mild to moderate Alzheimer's disease. They work by boosting acetylcholine -- a brain chemical involved in memory and learning -- and can modestly slow cognitive decline and improve daily functioning for months to years.

Memantine works on a different brain system (glutamate) and is used for moderate to severe Alzheimer's, often in combination with a cholinesterase inhibitor. The combination has shown better outcomes than either medication alone.

Behavioral Symptom Management

This is where psychiatric expertise becomes essential. Agitation, aggression, paranoia, depression, sleep disturbance, and wandering are among the most challenging aspects of dementia for families. I use a careful, stepwise approach: first, identifying and addressing environmental triggers and medical causes (pain, infection, medication side effects). When medication is needed, I choose agents with the best evidence and lowest risk profile for elderly patients.

My Approach: The Patient and the Family

Dementia care isn't just about the patient -- it's about the entire family system. Adult children making difficult decisions about a parent's independence. Spouses watching their partner change. Grandchildren trying to understand why abuela doesn't remember their name. My approach includes clear psychoeducation about the diagnosis and what to expect, practical guidance on safety planning, advance directives, and caregiving resources, and ongoing medication management with close attention to side effects in elderly patients. I also pay special attention to caregiver burnout -- because a caregiver who collapses from exhaustion can't help anyone.

Why Are Families from San Diego Seeking Dementia Evaluations in Tijuana?

Many cross-border families face a unique challenge: an elderly parent living in Tijuana whose cognitive decline has been noticed by adult children living in San Diego or California. Getting a thorough evaluation in Tijuana means the parent doesn't have to navigate an unfamiliar healthcare system across the border -- and the family gets answers in days rather than months.

We also see American families who bring elderly parents from San Diego for evaluation -- the cost savings are significant and the wait times are dramatically shorter. Dementia medications are available at Mexican pharmacies, often at a fraction of the U.S. cost.

We accept cash, credit/debit cards, Zelle, and Venmo. Family members are welcome and encouraged to accompany the patient. Telepsychiatry follow-ups are available for established patients when clinically appropriate and where legally permitted.

Our patients come from San Diego, Chula Vista, National City, San Ysidro, Oceanside, Imperial Beach, and Los Angeles. Learn more about cross-border care -->

New City Medical Plaza, Paseo del Centenario 9580, Floor 25, Suite 24 -- Zona Rio, Tijuana

Frequently Asked Questions About Dementia

Related Conditions

Dementia frequently coexists with other psychiatric conditions that require separate attention: