InsightsSeptember 21, 2026

Dementia, agitation and the environment: what do we know about multisensory stimulation?

Agitation in a person living with dementia is not simply a problem to suppress; it is a signal to interpret. A multisensory environment may help in some situations, but only after possible causes have been assessed and care has been tailored to the individual.

Close-up of an older person’s eye, with wrinkled skin lit by sunlight.

Pacing, shouting, resisting care or trying to leave may all be labelled agitation. The behaviour itself does not explain why it is happening. It may communicate pain, fear, an unmet need, care that feels incomprehensible or an environment the person can no longer make sense of.

The first question should therefore be “what might this behaviour be expressing?”, not “what stimulus can we add?”. Multisensory stimulation may offer moments of calm, pleasure or connection to some people living with dementia. It is not a universal answer or a substitute for clinical assessment.

Understand the cause before adding stimulation

NICE dementia guidance recommends a structured assessment before intervening. Teams should consider pain, hunger, thirst, constipation, urinary retention, infection, hypoxia, medication effects, fatigue, hearing or vision problems, disrupted routines, inappropriate care and an environment with too much noise or movement.

A sudden or fluctuating change over hours or days—particularly with inattention, drowsiness, confusion, hallucinations, withdrawal or agitation—may be delirium. It should not be attributed automatically to dementia or managed only by changing the room. When the distinction is unclear, NICE advises assessing and managing delirium first.

What does multisensory stimulation actually mean?

It may involve visual, auditory, tactile, olfactory, proprioceptive or movement-based input. In a Snoezelen environment, selected elements are offered in a controlled space with a facilitator. It does not mean turning on coloured lights, music and scent diffusers all at once.

Nor is every sensory activity Snoezelen or music therapy. A conversation, folding familiar fabrics or listening to a personally meaningful song may be valuable without a dedicated room. Some observed benefit may come from individual attention, predictability, biographical meaning and fewer environmental demands rather than the equipment itself.

What has research found?

A 2025 meta-analysis of 16 studies and 974 participants found a pooled reduction in agitation with multisensory stimulation. The estimated effect was large, but results were significantly heterogeneous, and there was no clear benefit for anxiety. This is promising evidence, not a guarantee for an individual.

A 2023 review of Snoezelen shows why uncertainty remains. Protocols, doses, facilitators and outcome measures varied widely, and average methodological quality was low. Most effects were measured during or immediately after a session. Seven of eight follow-up studies found no sustained benefit, and Snoezelen often did not outperform personalised recreational activity.

Music requires similar nuance. A 2025 Cochrane review covering 30 studies and 1,720 participants concluded that music-based interventions probably produce a small improvement in depressive symptoms, but probably have little or no effect on agitation or aggression at the end of treatment. Convincing evidence of benefits lasting four weeks or more is lacking.

This does not erase the value of a moment of connection or short-term de-escalation. It shows that calm during a session, change at the end of a programme and sustained benefit are different outcomes.

Music, light and scent do not carry equal evidence

A pragmatic trial of personalised music in 54 care homes found less verbal agitation and more observed pleasure, but no reduction in physical agitation. That distinction matters because “agitation” covers different behaviours.

Light may influence sleep and circadian timing, but studies use different intensities, schedules and durations. They do not justify “more light” without considering glare, vision, migraine, sleep and time of day.

Aromatherapy reviews disagree. Some report improvement on behavioural scales, while the Cochrane review found no convincing evidence and noted poor adverse-event reporting. In shared spaces, scent also reaches people who have not chosen it.

An evidence-based consensus published in 2026 judged tailored activities, individualised music and some touch or multicomponent approaches more consistently supported, while describing evidence for aromatherapy and Snoezelen as inconsistent or low quality. Consensus can guide decisions; it does not make any option universally effective.

The answer is not more stimulation

Safe use starts with a concrete aim: making care less distressing, reducing verbal agitation during a defined period or supporting engagement. Then:

begin with biography, preferences and aversions;
introduce few, low-intensity and reversible inputs;
observe verbal and non-verbal assent and refusal;
stop if tension, grimacing, avoidance, increased agitation or physical symptoms appear;
preserve audible alarms, falls prevention, infection control and clinical observation;
document the response during and after the intervention.

Music, touch, bright light or scent should never be forced. Difficulty speaking does not remove the right to refuse. If behaviour worsens, reassess clinical causes and unmet needs.

What can a care provider do today?

Before investing in a sensory room, check whether pain is treated, glasses and hearing aids are available, care is explained, avoidable noise and glare are reduced, and activities hold personal meaning. NICE recommends psychosocial and environmental approaches and personalised activities as part of the initial and ongoing response to distress.

Success is not “keeping the person quiet”. It may mean less fear during personal care, more pleasure, clearer communication or a shared activity. Measuring it requires a defined target behaviour, time window and set of possible adverse effects.

NeumaCare is exploring adaptable care environments through a gradual, supervised approach. If your organisation wants to design a cautious, person-centred pilot that fits its clinical protocols, get in touch.

Frequently asked questions

Does Snoezelen reduce agitation in dementia?

It may help during or immediately after some sessions, but studies are heterogeneous and sustained effects are not well established. It never replaces assessment of the causes of agitation.

Does music always calm a person living with dementia?

No. Response depends on preference, biography, volume, timing and clinical state. A meaningful song may help, but it can also irritate or evoke distressing memories.

Can aromatherapy be used in a shared room?

Only after a clinical and environmental assessment that includes everyone exposed. Asthma, allergy, migraine, nausea, aversion and whether people can realistically avoid the scent all matter.

How can we distinguish dementia-related agitation from delirium?

Delirium usually develops acutely and fluctuates, with altered attention or alertness. Any new or uncertain change warrants clinical assessment; it is unsafe to assume it is “just the dementia”.