What Changes About Executive Function After 40 with Dr. Brandy Callahan

In this episode of Taking Control: The ADHD Podcast, host Pete Wright and co-host Nikki Kinzer welcome Dr. Brandi Callahan, a clinical neuropsychologist and Canada Research Chair in adult clinical neuropsychology, to explore how executive function evolves in adults with ADHD after age 40. Dr. Callahan, founder of the Libra Lab at the University of Calgary, shares insights from her research on ADHD across the lifespan, particularly focusing on aging, brain health, and the increased risk of dementia in adults with ADHD. She explains that while neuropsychological tests often show no measurable deficits in executive function among adults with ADHD—due to optimal testing conditions—real-world challenges like multitasking, planning, and emotional regulation remain significant. The episode highlights the concept of 'allostatic burden,' the biological cost of chronic stress from navigating a neurotypical world, which may make ADHD brains more vulnerable to age-related decline. Dr. Callahan emphasizes that ADHD symptoms don’t necessarily worsen with age, but environmental shifts like retirement or perimenopause can make coping strategies less effective, requiring adaptation. She offers hope by underscoring that brain health is deeply tied to heart health, lifelong learning, and a positive mindset toward aging, with research showing that vocabulary and wisdom often improve with age. The conversation closes with practical advice: seek medical evaluation if cognitive concerns arise, prioritize self-compassion, and embrace growth through new experiences. Key takeaways include: 1) Executive function doesn’t inherently decline with age in ADHD; real-world performance is more impacted by environment and stress than lab tests suggest. 2) The 'squishy brain' metaphor, while playful, reflects the lived experience of ADHD—dynamic, resilient, and shaped by lifelong adaptation. 3) Hormonal changes during perimenopause can exacerbate ADHD symptoms due to the interplay between estrogen and dopamine. 4) Chronic stress from masking and neurodivergent navigation accumulates as 'allostatic burden,' potentially increasing vulnerability to brain aging. 5) Brain health is proactive: heart-healthy habits, mental stimulation, and positive aging attitudes are powerful protective factors. 6) Neuropsychological testing is not diagnostic for ADHD but can help rule out other conditions. 7) Research is urgently needed for adults with ADHD over 40, especially women, to understand long-term outcomes. 8) The ADHD HER study offers a chance to contribute to science across the lifespan.