Tag

Left Handedness

All articles tagged with #left handedness

science1 day ago•12 min saved

The Secret History of Left-Handedness: Genes, Spinal Cords, and Culture

Handedness begins in the spinal cord before brain lateralization, with tubulin gene variants shaping early asymmetry; left-handedness is partly genetic but not dictated by a single gene, and evolution likely favored right-handedness for efficiency and safety, though rare left-handers may have combat advantages. Cultural norms influence how left-handedness is perceived and taught, as seen in Ghana and historical contexts, yet the brain and hands remain plastic enough to retrain. The full origin mix—biology, evolution, and culture—remains unresolved.

via Quanta Magazine|

#culture #evolution #genetics

science4 months ago•6 min saved

Left-Handedness Linked to Competitive Edge in One-on-One Showdowns

Italian researchers find left-handed people, especially men, display greater competitiveness (including hypercompetitiveness) in one-on-one contexts, aligning with an evolutionarily stable strategy; dexterity tests didn’t predict competitiveness, and general personality traits were similar across handedness, with men more competitive and women more avoidance-prone.

via WIRED|

#competitiveness #evolutionary-psychology #gender-differences

science1 year ago•4 min saved

Myth Bust: Left-Handedness and Creativity Explored

A comprehensive review of over a century of research shows that left-handed people are not inherently more creative than right-handed people, and in fact, are underrepresented in highly creative professions, debunking the myth that lefties are more creative.

via Phys.org|

#creativity #left-handedness #meta-analysis

neuroscience2 years ago•4 min saved

"Uncovering the Genetic Basis of Left-Handedness and Neurological Disorders"

A study using UK Biobank data has identified rare variants in the TUBB4B gene significantly associated with left-handedness, shedding light on the genetic basis of this trait and its link to neurodevelopmental disorders. Despite the influence of these rare genetic variants, they account for less than 1% of the heritability of left-handedness, indicating a complex interplay of factors in determining this trait. The findings offer insights into the genetic intricacies of left-handedness and its connection to brain asymmetry and neurodevelopmental disorders, providing new avenues for investigating the developmental pathways leading to brain asymmetry.

via Neuroscience News|

#brain-asymmetry #genetics #left-handedness

science2 years ago•3 min saved

"Unraveling the Genetic Basis of Left-Handedness"

A new study sheds light on a genetic component of left-handedness, identifying rare variants of the TUBB4B gene that are 2.7 times more common in left-handed people. These variants may play a role in the development of brain asymmetry that determines dominant hand. The findings, based on genetic data from over 350,000 adults, suggest that microtubules controlled by TUBB4B are involved in setting up the brain's normal asymmetries. The prevalence of left-handedness varies globally, possibly reflecting cultural suppression. The study's findings may have relevance in psychiatry, as genes involved in brain asymmetry may also be linked to psychiatric traits.

via Reuters|

#brain-asymmetry #genetics #left-handedness

science-and-technology2 years ago•4 min saved

"Uncovering the Genetic Links to Left-Handedness: Insights from Rare Variants"

Researchers at the Max Planck Institute have identified rare protein-altering genetic variants associated with left-handedness, shedding light on the inheritable nature of this trait. Using data from the UK Biobank, they found that microtubule-related genes, such as TUBB4B, may play a role in setting up brain asymmetries. Additionally, genes associated with autism, DSCAM and FOXP1, were linked to left-handedness, providing potential insights into conditions like autism and schizophrenia. The study highlights the complexity of handedness as a polygenic trait and paves the way for further exploration of brain asymmetry in embryonic development.

via ZME Science|

#brain-asymmetry #genetics #left-handedness

science2 years ago•3 min saved

"Uncovering the Genetic Link to Left-Handedness"

A new study has identified rare genetic variants of the TUBB4B gene that are 2.7 times more common in left-handed individuals, shedding light on the genetic component of left-handedness. These variants may play a role in the development of brain asymmetry that determines dominant hand. The findings, based on genetic data from over 350,000 adults, suggest that microtubules controlled by TUBB4B are involved in setting up the brain's normal asymmetries. The study also suggests a potential link between genes involved in brain asymmetry and psychiatric traits, such as schizophrenia and autism.

via Newsmax|

#brain-asymmetry #genetics #left-handedness

science2 years ago•3 min saved

"Unraveling the Genetic Links to Left-Handedness Through Rare Variants"

A study has linked rare genetic variants to left-handedness, finding that people with these variants are more likely to be left-handed. The study also suggests potential connections between left-handedness and neurodevelopmental disorders, as well as genes associated with autism. Researchers identified a gene called TUBB4B, which codes for microtubules important for neuron development, as being linked to left-handedness. The findings provide further evidence for the involvement of specific genes in determining left-handedness and may lead to a better understanding of how genes contribute to brain development and disorders.

via ScienceAlert|

#brain-development #genetics #left-handedness

science2 years ago•3 min saved

"Uncovering the Genetic Link Between Cell Shape and Left-Handedness"

A new study sheds light on a genetic component of left-handedness, identifying rare variants of the TUBB4B gene that are 2.7 times more common in left-handed people, suggesting a role in brain asymmetry development. The gene controls a protein integrated into cells' microtubules, providing insight into the brain's normal asymmetries. The findings, based on genetic data from over 350,000 adults, may have relevance in psychiatry, as left-handedness is associated with conditions like schizophrenia and autism.

via AOL|

#brain-development #genetics #left-handedness