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Brain Evolution

All articles tagged with #brain evolution

A genome-first view of how the human brain evolved
neuroscience1 month ago

A genome-first view of how the human brain evolved

This Nature Neuroscience review outlines a 'genome-up' approach to decoding human brain evolution by leveraging thousands of genomes from mammals, non-human primates, ancient humans and modern humans to identify genomic regions under selection. It emphasizes integrating comparative experiments and functional dissection of human-evolved loci, and calls for expanding cohorts and applying diverse contexts to link genetic changes to cognitive and social traits across evolutionary timescales.

via Nature|
#ancient-dna#brain-evolution#genomics
Finger Clues Hint at Prenatal Hormones Behind Brain Growth
science3 months ago

Finger Clues Hint at Prenatal Hormones Behind Brain Growth

Newborns showed a link between higher prenatal estrogen exposure (indicated by a higher 2D:4D finger ratio) and larger head size in boys, suggesting hormones before birth may have helped drive brain growth during human evolution. Girls did not show the same pattern, and the findings contribute to the idea that brain expansion carried tradeoffs for male health, consistent with the estrogenized ape hypothesis.

via SciTechDaily|
#2d4d-ratio#brain-evolution#finger-length
Ancient Lead Exposure and Its Role in Human Brain Evolution
science7 months ago

Ancient Lead Exposure and Its Role in Human Brain Evolution

Lab-grown mini-brains with Neanderthal and modern human genes suggest that intermittent lead exposure may have influenced brain development and survival differences between the species, potentially impacting language and social cohesion. The study highlights how environmental factors like lead pollution, present in ancient times, could have played a role in human evolution.

via The Times|
#brain-evolution#genetics#lead-exposure
Gut Microbes: The Secret to Human Brain Evolution
science1 year ago

Gut Microbes: The Secret to Human Brain Evolution

A new study suggests that the gut microbiome may have played a crucial role in the evolution of larger brains in primates, including humans. Researchers found that gut microbes from larger-brained primates, such as humans and squirrel monkeys, helped convert food into energy for the brain more efficiently than those from smaller-brained primates. This process may have driven hosts to consume more food, channeling excess energy to the brain. However, the study, conducted on mice, requires further research to confirm these findings and understand the exact mechanisms involved.

via Livescience.com|
#brain-evolution#gut-microbiome#metabolism
Gut Microbes: The Secret to Human Brain Evolution
science1 year ago

Gut Microbes: The Secret to Human Brain Evolution

A study by Northwestern University suggests that gut microbes may have played a crucial role in the evolution of larger brains in primates by influencing energy production and usage. Researchers found that gut microbes from larger-brained primates like humans and squirrel monkeys enhanced energy production in mice, while those from smaller-brained primates like macaques favored fat storage. This indicates that gut microbiota differences evolved to meet the higher energy demands of larger brains, offering new insights into human evolution and the role of gut microbes in shaping metabolic traits.

via Neuroscience News|
#brain-evolution#energy-metabolism#gut-microbiota
"New Insights Reveal Why Humans Evolved Larger Brains"
science1 year ago

"New Insights Reveal Why Humans Evolved Larger Brains"

A new study in Nature Ecology and Evolution challenges the long-held assumption that brain and body mass in animals follow a simple power law relationship. Instead, researchers found a log-curvilinear relationship, best described by a second-order polynomial equation. This model better fits the data and explains variations across species, offering new insights into cerebral evolution and the rate at which different animals develop larger brains.

via ScienceAlert|
#animal-biology#brain-evolution#mammalian-studies
Big Brains in Primates: Not the Key to Superior Foraging
science2 years ago

Big Brains in Primates: Not the Key to Superior Foraging

A new study challenges the fruit-diet hypothesis for brain evolution in primates, finding that larger-brained primates like spider monkeys and capuchins do not have more efficient foraging routes compared to smaller-brained animals. This suggests that factors other than foraging efficiency, such as memory, tool use, or social complexity, may have driven the evolution of large brains in some species.

via ScienceAlert|
#brain-evolution#foraging#intelligence
"Primates' Big Brains Evolved for More Than Just Foraging, Study Finds"
science2 years ago

"Primates' Big Brains Evolved for More Than Just Foraging, Study Finds"

A new study challenges the leading hypothesis that primates evolved large brains to find food more efficiently. By tracking the foraging routes of large-brained primates and smaller-brained non-primates in Panama, researchers found no significant difference in foraging efficiency, suggesting that other factors like memory, tool use, or social complexities may have driven brain size evolution.

via The Conversation Indonesia|
#brain-evolution#foraging#intelligence