Summary: Can a hobby such as birdwatching physically reshape the brain? A new study suggests it can. Researchers who compared expert birders with beginners found that experts show measurable structural changes in brain regions involved in attention and visual perception. These changes—appearing as greater microstructural compactness—correlated with superior accuracy in identifying birds and persisted into older age, implying that sustained, complex practice may build a lasting cognitive reserve.
The study links long-term, domain-specific practice to durable neuroplastic changes. Because birding demands acute visual discrimination, focused attention, and strong memory for species and field marks, it provides a useful model for understanding how intertwined perceptual and mnemonic skills reshape the adult brain.
Key Findings
- Microstructural compactness: Expert birdwatchers showed lower mean diffusivity (MD) in attention- and perception-related cortical areas, indicating denser, more constrained tissue microstructure in these regions.
- Performance link: Lower MD in those regions predicted higher identification accuracy for both familiar local birds and less familiar nonlocal species.
- Longevity of change: Structural advantages were maintained in older experts compared with age-matched novices, suggesting potential attenuation of age-related decline in those areas.
- Transferable memory effects: Older experts were better able to remember arbitrary items (for example, faces) when those items were linked to their birding knowledge, pointing to domain-linked scaffolding that aids broader memory performance.
- Skill complexity matters: The results imply that learning complex skills that combine perception, attention, and memory fosters a form of neuroplasticity that can benefit general cognition.
Source: SfN
Study background
Published in the Journal of Neuroscience, the study was led by Erik Wing at Baycrest Hospital. The research compared 29 expert birders with 29 age- and sex-matched novices. Participants ranged broadly in age, enabling the investigators to assess brain structure and function across the adult lifespan.
To capture microstructural differences, the team used diffusion-weighted MRI, which measures the diffusion of water molecules through tissue. Wing explains the intuition behind the measure: “The metric we used reflects how water moves through brain tissue. In experts, there appears to be more constraint on that movement, consistent with more compact or highly organized tissue microstructure.”
Areas showing lower mean diffusivity included frontoparietal regions (like the superior frontal gyrus and intraparietal sulcus) and posterior cortical regions (including angular gyrus, precuneus, lateral occipital cortex, and fusiform gyrus). Across these regions, lower MD was associated with better performance at identifying birds, and task-related functional responses in several frontoparietal areas tracked accuracy, especially when experts identified less familiar, nonlocal species.
Implications for aging and cognition
Crucially, the structural differences did not vanish with age. Older experts retained microstructural advantages compared with age-matched novices, and the authors observed a trend suggesting a more gradual increase in MD with age among experts. While the study does not claim to prevent neurodegenerative disease, it supports the idea that complex, sustained training builds cognitive reserve—an anatomical and functional resource that can help preserve performance as the brain ages.
The team also tested whether domain expertise supports other cognitive tasks. Their behavioral results showed that older birders more successfully encoded and recalled arbitrary faces when those faces were paired with bird stimuli, suggesting that well-established domain knowledge can serve as a scaffold to improve memory for unrelated items when they are associated with that knowledge.
Frequently Asked Questions
A: The study compared individuals who had already achieved high levels of expertise, but its broader message is that learning and practicing complex, layered skills begins to reorganize the brain. Benefits start during the learning process and continue to accumulate with sustained practice.
A: Lower mean diffusivity indicates that water movement within tissue is more constrained, which can reflect greater cellular complexity, denser packing, or reorganization of tissue. Functionally, this appears to allow faster, more precise processing with less neural noise.
A: This study does not prove disease prevention. It shows that sustained, complex skill acquisition builds structural and functional brain advantages that contribute to cognitive reserve. That reserve can help maintain cognitive function longer, but it is not a guaranteed prevention against neurodegenerative disorders.
Editorial Notes
- This article was edited by a Neuroscience News editor.
- The cited journal paper was reviewed in full for accuracy.
- Additional context and clarification were added by editorial staff.
About this cognition and aging research news
Author: SfN Media
Source: SfN
Contact: SfN Media – SfN
Image: The image is credited to Neuroscience News
Original Research: Closed access. “The Tuned Cortex: Convergent Expertise-Related Structural and Functional Remodeling Across the Adult Lifespan” by Erik A. Wing, Jordan A. Chad, Geneva Mariotti, Jennifer D. Ryan, and Asaf Gilboa. Journal of Neuroscience. DOI: 10.1523/JNEUROSCI.1307-25.2026
Abstract (summary)
Neuroplasticity allows the brain to change structurally and functionally with experience. While much prior work isolates single learning measures, this study examines convergent remodeling in a domain that combines high-level perception, attention, and memory: expert bird identification. Using diffusion-weighted MRI, task-based fMRI, and behavioral testing across adults ages 22–79, the study identifies regional microstructural and functional differences linked to expertise and performance. The findings point to experience-dependent cortical tuning that supports expert behavior and suggests potential resilience of those adaptations across the adult lifespan.