Sleep Apnoea Is Bad For Brain Health

Treating Obstructive Sleep Apnoea(OSA) Now Will Reduce Long Term Harm

I have always found it interesting that when I suggest a sleep study and OSA treatment, and then compare it to the results expected from blood pressure medication or diabetic medication, there is often only a passing interest from the patient.

However, mention the brain or cognitive decline and suddenly, there is a keen interest to hear more.

What many patients do not realise is that OSA can have dramatic effects on your health in both the short and long term. Airway collapse during sleep cuts off critical oxygen flow, causing a cascade of systemic issues.

OSA Facts

• Inflammation and congestion, especially related to OSA, are harmful. Repetitive airway closures trigger widespread inflammation and damage delicate cerebral blood vessels.
• OSA can lead to cognitive decline, but there is good news: it can be treated in advance. Early intervention helps protect your neural pathways before permanent damage takes root.
• Oxygenation during sleep is essential for surgical candidates, but also addressed correctly, avoids weight regain. Proper nighttime oxygen levels protect the heart during operations and stabilize metabolic hormones.
• Ignoring these alerts is not helpful. Chronic snoring and unrefreshing sleep are warnings that your brain is actively struggling for air.

How Sleep Apnoea Quietly Damages the Brain

Relatively recent breakthrough neuroimaging research, published in the medical journal Neurology, sheds light on exactly what happens to the brain when OSA is left untreated.

The study reveals that low oxygen levels, known as hypoxemia, can damage the brain's microcirculation, leading to Cerebral Small Vessel Disease (CSVD). This vascular stress manifests clearly on brain scans which show areas of tissue scarring and diminished structural integrity in the brain.

The Danger of Rapid Eye Movement (REM) Related Hypoxemia

The brain is highly active during REM sleep, a time when a stable oxygen supply is crucial. Oxygen deficit during this period can cause more severe damage, according to the research:

1. Frontal and Parietal Lesions: Severe oxygen drops strongly correlate with a increased damage in the front and sides of the brain.
2. Temporal Lobe Degeneration: This lack of oxygen triggers thinning in the medial temporal lobe, an area of the brain vital for memory and one of the very first regions affected by Alzheimer's disease.
3. Impaired Memory Retention: Patients experiencing REM-related hypoxemia have a reduced ability to retain memories overnight, linking sleep hypoxia to day-to-day cognitive loss.

Even "Mild" Sleep Apnoea Carries Risk

The most surprising finding of this study is that many patients who are only "mildly" affected by OSA, still experience considerable drops in oxygen during REM sleep. So it's possible you could be accumulating vascular brain damage and accelerating dementia risk without realizing your breathing is compromised.

If you think this could be you, please check in with us.

How Can Dr Lockie Help?

We can easily address this.

Effective interventions like Continuous Positive Airway Pressure (CPAP) and targeted lifestyle adjustments can restore quality sleep and safeguard your long-term cognitive health.

Contact us now for an evaluation.

Reference

Association of Hypoxemia Due to Obstructive Sleep Apnea With White Matter Hyperintensities and Temporal Lobe Changes in Older Adults