dogs’ brains – A new Misryoum-reviewed study suggests domestication-related brain changes in dogs began at least 5,000 years ago.
A timeline of domestication may be getting an important update: research featured by Misryoum indicates that dogs’ brains began to shrink at least 5,000 years ago.
For years. scientists have known that domesticated dogs tend to have smaller brains than wolves. but pinning down when that shift happened has remained controversial.. Misryoum reports that the new study links the reduction to a period in the Late Neolithic. offering fresh context for how early human–dog relationships evolved over time.
The findings come from analyses of skull CT scans covering both ancient and modern canines.. Misryoum notes that researchers compared prehistoric wolves and dogs spanning roughly 35. 000 to 5. 000 years ago with a large set of modern specimens. including wolves. multiple dog breeds. and animals described as village dogs and dingoes.. By using the scans to track brain-size changes across evolutionary history. the team concluded that modern dog groups collectively show substantially smaller brains than wolves.
One of the most striking details is when the shift becomes clearer.. Misryoum reports that Late Neolithic dogs. dated to about 5. 000 to 4. 500 years ago. had brains markedly smaller than wolves living in the same timeframe. and their brain sizes were described as comparable to those of pugs today.. The researchers also found that the pattern held even when accounting for body size. an important step because smaller animals often have smaller brains.
Meanwhile, the study suggests this trend was not uniform across early domestication.. Misryoum highlights that two canines living alongside humans much earlier. often discussed as “protodogs. ” did not show the expected brain-size reduction relative to wolves; in one case. the brain was even relatively larger.. That raises the possibility that brain size may have increased at the earliest stages. before later domestication processes were associated with smaller brains.
This matters because brain size alone does not determine personality or capability.. Misryoum emphasizes that the researchers argue reductions in brain size should not be read as “stupidity. ” and everyday dog behavior is shaped by more than anatomy.. Still. the work points to how evolutionary pressures. changing diets. and different roles in human communities could leave measurable traces in the brain over long periods.
Misryoum also notes that the study discusses possible explanations for why both bodies and brains might have trended smaller in the Late Neolithic.. The team points to ideas ranging from how brain reorganization can affect trainability and wariness to the simple energetic logic of survival in environments where food may have been more limited.
In this context. Misryoum says the broader takeaway is about timing: the study implies that the full set of domestication-related traits may have emerged later than genetic evidence sometimes suggests.. As researchers continue to refine the chronology of early dog history. the brain-size record may become a key piece of the domestication puzzle. helping explain how a loose early relationship could gradually transform into something far more tightly connected.