Every dementia behavior is a message the brain can't say in words

Most "difficult" dementia behaviors are the brain's best attempt to communicate something it can no longer say in words.

Someone you care for becomes agitated, screams, or cries for reasons you cannot identify. These moments feel chaotic, personal, and sometimes frightening.

The instinct is to manage the behavior, to redirect, contain, or correct. And while redirection has its place, it often fails because it treats the behavior as the problem, but the behavior is the signal.

Understanding what the brain is actually doing during these episodes changes everything, because it transforms how you interpret and respond to it.

The brain is not malfunctioning randomly

Dementia damages specific brain regions in a roughly predictable sequence, and the behaviors that emerge correspond to which systems are affected.

This follows patterns that neuroscience can map.

The frontal lobes (responsible for impulse control, social behavior, and emotional regulation) are among the areas affected early in several forms of dementia.

When these regions lose function, the person doesn't choose to be aggressive or inappropriate, but the neural brake system that would normally suppress those impulses is weakened or offline.

What you're seeing is an unfiltered response, to something the person is experiencing internally.

The temporal lobes (which support memory, language comprehension, and emotional processing) degrade progressively. As they do, the person loses the ability to name what they're feeling, to remember where they are or why, and to connect the current moment to a coherent narrative.

Imagine waking up in an unfamiliar room, surrounded by people who expect something from you that you don't understand, with no memory of how you got there.

The anxiety and agitation that would produce in anyone, is exactly what many people with dementia experience on a recurring basis.

The parietal lobes (which integrate sensory information and spatial awareness) also change. This can make familiar environments feel disorienting.

Mirrors become strangers, shadows become threats, a patterned floor can look like a hole.

These are not hallucinations in the psychiatric sense, but the result of a brain that can no longer accurately assemble sensory input, into a reliable picture of the world.

Sundowning is neurological and not behavioral

One of the most common and distressing patterns is sundowning: increased agitation, confusion, and distress in the late afternoon and evening.

Families often interpret this as tiredness or stubbornness, but it's neither. The suprachiasmatic nucleus (the brain's circadian pacemaker) degenerates in Alzheimer's disease and several other dementias.

As this structure loses function, the brain's ability to track time of day deteriorates. The normal dip in alertness that occurs in the late afternoon becomes amplified in a brain that can no longer regulate its own arousal cycle.

Light levels drop, visual processing (already compromised) becomes less reliable, and the accumulation of the day's cognitive fatigue overwhelms a system with diminishing reserves.

This means sundowning is not a choice, a habit, or a reaction to something you did; but a predictable consequence of circadian disruption in a damaged brain.

Knowing this doesn't eliminate the behavior, but it does eliminate the question "Why are they doing this to me?" The answer is: their brain is doing it to them.

"Difficult" behaviors as unmet needs

Research in dementia care increasingly supports a need-driven model of behavior.

The premise is straightforward: when a person can no longer express their needs through language or organized action, the need doesn't disappear.

It gets expressed through whatever channel is still available, which often looks like agitation, aggression, repetitive vocalizations, wandering, or refusal.

A person who pulls at their clothes may be too warm, uncomfortable in a fabric texture, or in pain they cannot localize or describe.

Someone who wanders may be looking for something familiar, trying to fulfill a routine from decades ago, or simply responding to restlessness they can't articulate.

A person who becomes agitated during personal care may be experiencing the interaction as intrusive or threatening, because they no longer understand who is touching them or why.

The interpretive shift here is significant. Instead of asking "How do I stop this behavior?" the more useful question becomes "What is this person trying to tell me?"

This reframing requires a willingness to treat the behavior as meaningful communication rather than as a symptom to suppress.

Practical strategies that follow from the neuroscience

Look for the trigger, not just the behavior. Keep a simple log: what happened before the episode, what time it occurred, who was present, what the environment was like. Patterns emerge quickly and they often point to a specific sensory, physical, or emotional trigger that can be modified.

Reduce environmental complexity. A brain struggling to integrate sensory input is easily overwhelmed by noise, visual clutter, competing conversations, and unfamiliar spaces. Simplifying the environment reduces the processing demands on a system that is already running at capacity.

Validate the emotion, even when the content doesn't make sense. If someone with dementia insists they need to pick up their children from school (children who are now adults), correcting the factual error is less important than addressing the underlying feeling: responsibility, purpose, worry. Responding to the emotion rather than the content, reduces conflict and builds trust.

Approach personal care slowly and with narration. Explain what you're doing as you do it, even if you're not sure how much is understood. The tone of voice, the pacing, and the predictability of your movements, matter as much as the words. Sudden or unexplained touch activates threat responses in a brain that can no longer contextualize the interaction.

Work with the circadian rhythm, not against it. For sundowning, increase light exposure during the day (especially morning light), reduce stimulation in the late afternoon, and create a predictable wind-down routine. These interventions won't eliminate the pattern, but they can reduce its intensity.

Where to go deeper

These principles are at the core of Decoding the Dementia Brain, an applied workshop led by cognitive neuroscientist Amelia Enginco-Figueroa. The workshop turns complex brain science into clear, usable guidance for everyday caregiving. You'll learn to decode the biological changes behind what you're seeing so that "difficult behaviors" start to look less like chaos and more like meaningful signals.

Amelia Enginco-Figueroa is a Swiss-educated Cognitive Neuroscientist specializing in attention, memory, and learning. She works with individuals, families, and organizations to apply brain science to real-world challenges. Learn more at aef-cnp.com.