Highlights
- Home-based PBM improved cognition and behavior in patients with dementia.
- Cerebral perfusion and functional connectivity increased.
- The protocol combined transcranial and intranasal PBM.
- Treatments were well tolerated with no adverse effects.
- PBM may be a practical adjunct for dementia management.
Background
Accessible, non-invasive therapies are increasingly needed to support cognitive and behavioral function in dementia. Home-based PBM offers a practical approach for long-term care settings.
Intervention Protocol
Participants received PBM at home:
- Wavelength: 810 nm
- Pulse frequency: 40 Hz
- Session duration: 20 minutes
- Frequency: 3 sessions per week
- Duration: 12 weeks
- Total energy per session: 240 J
Applications combined transcranial and intranasal light delivery.
Key Findings
- Cognitive scores (ADAS-cog) improved in the PBM group, while declining in usual-care controls.
- Behavioral symptoms (NPI) improved significantly.
- Enhanced connectivity within default mode network regions was observed.
- No adverse effects were reported.
Takeaway
Home-based transcranial and intranasal photobiomodulation may provide a safe, feasible, and supportive intervention for cognitive and behavioral symptoms in dementia. Further controlled trials are needed to confirm these findings.
Reference: Chao LL. Effects of Home Photobiomodulation Treatments on Cognitive and Behavioral Function, Cerebral Perfusion, and Resting-State Functional Connectivity in Patients with Dementia: A Pilot Trial. Photobiomodul Photomed Laser Surg. 2019; 37(3):133-141. doi: 10.1089/photob.2018.4555