What PBM Is

Photobiomodulation (PBM) is non-invasive. No heat, no radiation, no electrical current. The light itself does the work.

Here is what happens at the cellular level:

• Near-infrared light at a specific wavelength (810 nm) passes through tissue and is absorbed by mitochondria, the energy-producing structures inside every cell.

• When mitochondria absorb this light, they increase their production of ATP, the cell's primary energy source.

• With more energy available, the cell can do more: repair damaged structures, reduce oxidative stress, clear inflammatory compounds, and improve communication with neighbouring cells.

• In the brain specifically, this process supports cerebral blood flow, reduces neuroinflammation, promotes the growth of new neural connections (via the BDNF pathway), and helps the brain's own waste-clearance systems work more efficiently.

Nothing is added to the body. The light activates what is already there.

Who It Is For

PBM is appropriate for a wide range of neurological and psychiatric presentations, and for people who want to support healthy brain function without any of those diagnoses.

Conditions we address with PBM at Gray Matter:

• Alzheimer's disease and mild cognitive impairment (MCI)

• Traumatic brain injury (TBI) and post-concussion syndrome

• Parkinson's disease

• Depression and treatment-resistant depression

• Anxiety and PTSD

• ADHD and cognitive fatigue

• OCD

• Autism spectrum disorder (ASD)

• Chronic pain and fibromyalgia

• Sleep difficulties

• Tinnitus

• Cognitive performance and brain health maintenance

PBM is also used by athletes for recovery and performance. The cellular mechanisms are the same. ATP production, reduced oxidative stress, improved circulation. The goal is just different.

What Makes Our Delivery Different

Most PBM devices deliver light from a single direction: outward through the scalp. The skull attenuates a significant portion of that light before it reaches brain tissue. Devices that rely only on this pathway face a hard physical limit on how much light actually arrives where it is needed.

The system used at Gray Matter delivers near-infrared light through two simultaneous pathways:

• Transcranial. Multiple LED clusters positioned across the scalp deliver light directly through the skull to targeted cortical regions. Placement follows the clinical protocol for the condition being treated.

• Intranasal. A second applicator delivers light through the nasal cavity. The nasal mucosa is richly vascularised. Light absorbed here enters the bloodstream and is carried throughout the cerebral circulation, reaching deep brain structures that transcranial light alone cannot penetrate.

Both pathways are active simultaneously, in the same session. No other widely available clinical PBM system combines these two routes at this power level with published clinical research supporting the approach.

What to Expect

Sessions are 20 to 25 minutes. They are quiet and require no effort on your part.

• You sit in a comfortable chair.

• The transcranial clusters are positioned on your scalp at the protocol sites.

• The intranasal applicator is placed gently at the entrance to the nasal cavity.

• The device is switched on. You may see a faint red glow through closed eyelids.

• Most people feel nothing beyond mild warmth. Some report a gentle relaxation during the session.

• There is no recovery time. You leave immediately after.

Sessions are typically combined with neurofeedback in the same appointment. The two work well together: PBM increases cellular readiness and cerebral blood flow, which supports the brain's capacity to learn from the feedback training that follows.