Louisa Nicola: Alzheimer’s prevalence projected to triple by 2050, the critical role of deep sleep in brain health, and how digital content consumption impacts cognitive decline | Shawn Ryan Show

Alzheimer's cases are set to triple by 2050, underscoring the urgent need for brain health innovations.

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Add us on Google by Editorial Team Apr. 30, 2026

Key takeaways

• Alzheimer’s disease prevalence is projected to triple by 2050, indicating a significant public health challenge.
• Currently, approximately sixty million people globally are affected by Alzheimer’s disease.
• Brainwaves are crucial for cognitive function and can be mapped using EEG technology.
• Gamma brainwaves are often the first to deteriorate in neurodegenerative diseases.
• Neurotechnology is anticipated to experience substantial growth and development in the next five years.
• Amyloid beta plaques are cleared from the brain during deep sleep, highlighting the importance of sleep for brain health.
• Amyloid plaques are a hallmark of Alzheimer’s disease, contributing to neurodegeneration.
• Consuming low-quality content can lead to cognitive decline, especially among younger generations.
• Excessive use of AI and social media is linked to cognitive decline and mild cognitive impairment.
• Technology can change brain functionality but does not alter genetic makeup.
• Deep sleep plays a critical role in clearing harmful substances from the brain.
• The impact of digital content consumption on cognitive abilities is a growing concern.
• Neurotechnology investments are increasing, indicating a promising future for brain health innovations.

Guest intro

Louisa Nicola is a neurophysiologist, head performance advisor, and founder of Neuro Athletics, which optimizes brain performance for elite athletes and executives through cognitive testing, EEG scans, and neurological training. A former professional triathlete who competed internationally for Australia, she transitioned to neuroscience after using brain training to recover from injury and place 13th at the Auckland World Championship series. She holds a Master of Medicine in Clinical Neurophysiology from the University of Sydney and hosts The Neuro Experience podcast focused on cognitive health and Alzheimer’s prevention.

The looming threat of Alzheimer’s disease

• The prevalence of Alzheimer’s is expected to triple by the year 2050

  — Louisa Nicola

• Around sixty million people worldwide currently have Alzheimer’s disease.
• The anticipated increase in Alzheimer’s cases highlights a major public health concern.
• Understanding current statistics and trends is crucial for addressing Alzheimer’s impact.

• Currently the statistics are around sixty million people worldwide have that disease

  — Louisa Nicola

• This prediction underscores the need for advancements in Alzheimer’s prevention and treatment.
• The growing prevalence of Alzheimer’s demands increased awareness and research efforts.
• Alzheimer’s disease represents a significant challenge for future healthcare systems.

Understanding brainwaves and their significance

• Brainwaves are oscillations produced by neurons firing together.
• These brainwaves can be mapped using EEG technology.

• When our neurons fire together… we can map those out using an EEG

  — Louisa Nicola

• Different types of brainwaves include alpha, beta, gamma, and delta waves.
• Gamma brainwaves are critical for cognitive function and are the first to deteriorate in neurodegenerative diseases.

• It is said that these are the first oscillations to deteriorate during neurodegenerative diseases

  — Louisa Nicola

• Understanding brainwaves is essential for exploring cognitive tasks and brain health.
• EEG mapping provides valuable insights into brain function and potential disorders.

The rise of neurotechnology

• Neurotechnology is poised to become a significant area of development in the coming years.

• Look it’s I think it’s going to be the next big thing in terms of neurotech over the next five years

  — Louisa Nicola

• Companies are investing millions in neurotechnology innovations.
• This trend reflects a growing interest in brain health and cognitive enhancement.
• The future of neurotechnology holds promise for addressing neurological disorders.
• Understanding the current landscape of neurotechnology is crucial for anticipating future advancements.
• Investment trends indicate a bright future for neurotechnology and brain health solutions.
• Neurotechnology development is driven by the demand for cognitive health improvements.

The role of sleep in brain health

• Amyloid beta plaques can be cleared from the brain during deep sleep.
• This clearance occurs through the perivascular space into the lymphatic system.

• When we accumulate these amyloid beta plaques… they get cleared out during deep sleep

  — Louisa Nicola

• Deep sleep is essential for maintaining brain health and preventing neurodegeneration.
• The biological process of plaque clearance highlights the importance of sleep.
• Understanding sleep’s role in brain health can inform therapeutic interventions.
• Amyloid plaque clearance during sleep is crucial for Alzheimer’s prevention.
• Sleep plays a vital role in maintaining cognitive function and brain health.

The impact of digital content on cognitive health

• Excessive consumption of low-quality content can lead to cognitive decline.
• Younger generations are particularly at risk due to modern content consumption habits.

• This brainrot era is basically what you’re doing is you’re looking and scrolling at dumb content

  — Louisa Nicola

• Providing adequate cognitive stimulus is essential for preventing cognitive decline.
• The impact of digital content on cognitive abilities is a growing concern in today’s society.
• Awareness of content consumption habits is crucial for maintaining cognitive health.
• The “brainrot era” highlights the need for mindful content consumption.
• Understanding the effects of digital content is essential for promoting cognitive well-being.

The effects of technology on brain functionality

• Excessive use of AI and social media can lead to cognitive decline.

• If we don’t use AI effectively… we’re leading ourselves towards mild cognitive impairment

  — Louisa Nicola

• Technology can change brain functionality but does not alter genetic makeup.

• I don’t think it can alter the genes I think it can just change the functionality

  — Louisa Nicola

• Understanding the distinction between genetic evolution and functional changes is crucial.
• The influence of technology on brain health requires careful consideration.
• Mindful use of technology is essential for maintaining cognitive health.
• The negative effects of technology on brain health are a growing concern.

The importance of amyloid plaques in Alzheimer’s disease

• Amyloid plaques are a significant factor in Alzheimer’s disease.
• These plaques lead to neurodegeneration and brain function impairment.

• The amyloid is it’s one of the hallmarks of Alzheimer’s disease

  — Louisa Nicola

• Understanding amyloid plaques is crucial for addressing Alzheimer’s disease.
• The accumulation of amyloid plaques contributes to cognitive decline.
• Research on amyloid plaques is essential for developing Alzheimer’s treatments.
• The role of amyloid plaques in neurodegeneration highlights the need for prevention.
• Addressing amyloid plaque accumulation is key to combating Alzheimer’s disease.

Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.