How does light therapy improve cognitive function?
Written by
David Nelson
Reviewed by
Prof. Graham Pierce, Ph.D.Cognitive function is enhanced with light therapy mainly due to increased blood flow to the prefrontal cortex, which is responsible for the executive functions like decision-making and focus. Specific wavelengths stimulate mitochondrial energy production in your neurons, and I've seen measurable improvements in cognitive function, like memory tests, in my clients after consistent use.
Blood Flow Optimization
- Process: Near-infrared light dilates cerebral blood vessels
- Benefit: 20-30% increased oxygen to prefrontal cortex
- Effect: Enhanced neural processing speed
Mitochondrial Stimulation
- Process: Light energy boosts ATP production in neurons
- Benefit: Improved cellular energy for cognitive tasks
- Effect: Reduced mental fatigue during demanding work
Neuroplasticity Support
- Process: Activates BDNF (brain-derived neurotrophic factor)
- Benefit: Strengthens neural connections
- Effect: Better learning retention and recall
Transcranial and Intranasal Illuminators are the most effective way to deliver light. Headgear directly targets the prefrontal cortex. Probes inserted intranasally can reach deeper brain structures through the nasal passages. I recommend morning sessions before any mentally demanding work. This has the advantage of shifting the mind into an optimal state of functioning.
Clinical studies reveal these cognitive benefits. Research shows significant improvements in the Stroop and digit span memory tests after four weeks, and participants reported clearer thinking and less mental fatigue. I recommend using FDA-cleared devices with multiple wavelengths of light for precise control of wavelength. Maintaining effective doses is crucial when seeking lasting neural changes.
Light therapy effectively complements other strategies for brain health. Exercise regularly and get good sleep. Mediterranean-style nutrition is beneficial for cellular health. Always consult with a neurologist regarding cognitive issues. I collaborate with specialists in memory care to create integrated protocols.
For cognitive support related to age, start with short intervention periods. Slowly increase duration over time as the individual can tolerate it. Use simple memory tests to assess performance over time. I assist clients in developing measurable benchmarks for progress and growth. It has produced meaningful results over time.
Light therapy is a non-invasive way to improve brain function. It's not a cure, but it's a great adjunct to support brain function. With consistent use, many benefit from improved cognitive function. I've seen a significant improvement in focus among clients from various occupational groups.
Read the full article: 8 Light Therapy Benefits Explained Simply
