Alzheimer vs epilepsy

Alzheimer’s disease and epilepsy are two different neurological conditions. Alzheimer’s is a progressive disease that gradually damages brain cells, causing memory loss and declining thinking skills. Epilepsy is a tendency to have repeated, unprovoked seizures, which are sudden bursts of abnormal electrical activity in the brain. One is defined by a slow decline; the other by episodes that start and stop.

Yet the two are more connected than many people realize. People with Alzheimer’s have a higher risk of seizures than people of the same age without it, and some types of seizures in older adults can cause memory lapses that look a lot like dementia. Understanding where these conditions meet can help families notice problems that might otherwise be missed.

The Basics of Each Condition

Alzheimer’s disease involves the buildup of beta-amyloid plaques and tau tangles in the brain, leading to the loss of connections between nerve cells and eventually to cell death. Symptoms typically start with trouble remembering new information and progress over years to affect language, judgment, behavior and physical abilities.

Epilepsy is diagnosed when a person has had two or more unprovoked seizures, or one seizure with a high risk of more. Seizures vary widely. Some cause the whole body to stiffen and jerk. Others are subtle, causing a person to stare, stop responding, smack their lips or fiddle with objects for a minute or two, with little or no memory of the event afterward. According to the CDC, epilepsy is common, and it can start at any age, including later in life.

How the Two Conditions Differ

Why Seizures Are More Common in Alzheimer’s

Researchers have found that the brain changes of Alzheimer’s can make networks of nerve cells overly excitable. Amyloid and tau appear to disrupt the balance between signals that stimulate brain activity and signals that calm it. The result can be abnormal electrical activity, sometimes visible only on specialized EEG recordings, and in some people, outright seizures.

Seizures can occur at any stage of Alzheimer’s, but they are more frequently recognized in later stages and in people with early-onset forms of the disease. Scientists are actively studying whether this hidden electrical activity could contribute to faster cognitive decline, and whether treating it could help. That research is ongoing, and it is one reason doctors pay attention to unexplained spells in people with dementia.

When Seizures Look Like Memory Loss

Not every episode of confusion in an older adult is dementia. Focal seizures, which affect only part of the brain, can cause brief periods of unresponsiveness or confusion that may be mistaken for “senior moments” or worsening dementia. Afterward, people may feel tired or foggy for a while.

A specific condition called transient epileptic amnesia illustrates this well. It typically affects older adults and causes recurrent, brief episodes of memory loss, often noticed on waking, during which the person may repeat questions but otherwise seem fairly normal. Between episodes, people may also report patchy gaps in memories of past events. The good news is that it often responds well to anti-seizure medication, which is why recognizing it is so valuable.

On the other side, epilepsy itself, especially when it involves the temporal lobes, can cause long-term memory difficulties. Some anti-seizure medications can also affect concentration or memory, so it is worth discussing side effects with a doctor rather than assuming dementia.

Diagnosis and Treatment When Both Are Present

When a person with Alzheimer’s or memory concerns has unexplained spells, a doctor may order an EEG, sometimes a prolonged or overnight recording, to look for seizure activity. A detailed description of the episodes from a family member or caregiver is often the most useful piece of information, and a short video taken on a phone can help greatly. Note the time of day, what the person was doing beforehand, how long the spell lasted and how they seemed afterward.

If seizures are confirmed, anti-seizure medications are usually effective, and doctors often choose options with fewer cognitive side effects for older adults. Treatment of seizures does not treat Alzheimer’s itself, but it can reduce dangerous episodes and falls and may help a person feel clearer. Meanwhile, Alzheimer’s care continues as usual, with attention to safety, routine and caregiver support.

Frequently Asked Questions

Can epilepsy cause dementia?

Epilepsy does not cause Alzheimer’s, but long-standing or poorly controlled seizures can affect memory. Research continues on the two-way relationship between these conditions.

What do seizures look like in someone with Alzheimer’s?

They may be obvious convulsions or subtle spells of staring, unresponsiveness or unusual movements, followed by sleepiness or extra confusion.

Where can I learn more?

The CDC offers seizure first aid guidance, and the National Institute on Aging and the Alzheimer’s Association explain Alzheimer’s symptoms and care.

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