The Claim
In cognitively healthy adults aged 35–90, cortical thickness in speech motor regions such as the anterior and posterior insula declines at a rate of 0.05% per year or less, while hippocampal volume declines at a faster rate after age 60, demonstrating differential aging trajectories between these brain regions.
What the research says
Not yet evaluated
We are still looking at what the research says.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In healthy adults aged 35 to 90, the thickness of brain areas involved in speech control decreases very slowly—by 0.05% per year or less—while the hippocampus, a memory-related region, shrinks more rapidly after age 60. This shows that different brain regions age at different rates.
See the scientific wording
In cognitively healthy adults aged 35–90, cortical thickness in several speech motor regions (e.g., anterior and posterior insula) shows minimal age-related decline (0.05% per year or less), while hippocampal volume declines more steeply after age 60, indicating that not all speech motor regions follow the same aging trajectory and some may be relatively preserved.
The brain regions that control speech stay thicker longer because they have more energy support and stronger connections, while the memory center loses volume faster because it is more sensitive to damage from aging processes like reduced blood flow and protein buildup.
What the research says
1 studyThe study found that anterior and posterior insula regions had near-zero or slightly positive annualized thinning rates in late adulthood, contrasting with other speech motor regions and the hippocampus, indicating heterogeneity in aging patterns across speech-related areas.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.