#HandEDness

@kill-bait.bsky.social

1 week ago

Research Reveals How Zebrafish Larval Behavior Sheds Light on Human Handedness Handedness, whether right or left, is a familiar aspect of daily life that shapes how humans perform countless tasks, from writing to eating. Surprisingly, this behavioral asymmetry is not unique to humans; many animals, including primates, birds, and even blue whales, exhibit similar lateralized behaviors. Researchers have long sought to understand why such asymmetries exist and whether they confer survival advantages. Recent studies using larval zebrafish have provided valuable insights. These fish display motor asymmetry, consistently turning left or right when exposed to certain stimuli, such as the loss of light. Scientists discovered that approximately 60 neurons in the thalamus, a brain region conserved across vertebrates, are linked to this directional preference. Removing these neurons eliminated the asymmetry, suggesting a clear neural basis. Experiments with multiple fish species confirmed that motor asymmetry is widespread, except in blind cavefish, highlighting the role of environmental factors like light in shaping behavior. Beyond motor patterns, handedness correlates with broader brain asymmetries influencing language and memory. In zebrafish, motor asymmetry appears to enhance the efficiency of finding light sources, crucial for survival. Overall, studying behavioral asymmetries in fish offers a window into the evolution of lateralized brain functions in humans, revealing how genetics, development, and environmental pressures interact to shape behavior.

Research Reveals How Zebrafish Larval Behavior Sheds Light on Human Handedness

🤖 IA: It's not clickbait ✅
👥 Usuarios: It's not clickbait ✅

#zebrafish #handedness #behavioralasymmetry

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Flipboard Science Desk

@sciencedesk.flipboard.social.ap.brid.gy

1 week ago

Original post on flipboard.social

To understand left- and right-handedness, Professor Eric Horstick looks at zebrafish, which have transparent bodies, develop into adults in a few days, and their genetics and brain structure are highly similar to humans'. Here's his story for @conversationus@newsie.social […]

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Francis Mangion (M) (VR/AR/*)

@franciswashere.arvr.social.ap.brid.gy

1 month ago

r/virtualreality u/Plus_Look3149 :

u/sidney_ingrim : "You got it..." #setup #play_space #peripherals #motionsicknews #handedness #performance #comfort #catalogue

https://www.reddit.com/r/virtualreality/s/d07GcGN3HG

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@herrtimsimon.bsky.social

2 months ago

Left-handers excel in some sports — but not all.
They shine in interactive (head-to-head) sports but are rare in track-and-field.
Context matters. New research shows only ~2–5% left-handers among elite athletes in javelin, discus, & shot put.
👉 royalsocietypublishing.org/rsos/article...

#Handedness

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LaurenGuillette.bsky.social

@laurenguillette.bsky.social

4 months ago

Sex differences in giant panda paw preferences during bamboo feeding Learning & Behavior - We examined giant panda paw use while feeding on bamboo to determine if this species exhibits manual lateralization. Video recordings of 21 captive giant pandas (15...

New #paper in #psynomLB Sex differences in giant panda paw preferences during bamboo feeding https://bit.ly/47pnzv6 by Snyder et al.

@zooatlanta.bsky.social @sandiegozoo.bsky.social @compcogsoc.bsky.social

#handedness #lateralization #bear

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Bangor Imaging Unit

@bangorimagingunit.bsky.social

5 months ago

#4 of our BIU Research Highlights, 2024 Series. This one is from @dpcarey123.bsky.social (@psychbangor.bsky.social) and colleagues. #handedness #lateralization #perception #language #neuroscience #research | @bangoruniversity.bsky.social

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💪🏼🫎🛶🦫🌲💨🪨🌊

@grannycanuck.bsky.social

7 months ago

Left Handers Day Official Site #lefthandersday Celebrate being left-handed on August 13th

Hey #LEFTIES ✍🏼
#LeftHanders 🗓️ Day is Aug13
Seeking global
#LeftHanded Experiences - (family) Practices…🔚 #LefTHander #LEFT-HandeR #LEFT-Handed #LEFT-HandEdNESS #HandEDness #Lefty #leftIE #SouthPaw • lefthandersday.com

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💪🏼🫎🛶🦫🌲💨🪨🌊

@grannycanuck.bsky.social

7 months ago

Hey #🇨🇦LEFTIES✍🏼
#LeftHanders Day is Aug13🗓️
Seeking YOUR
#LeftHanded Experiences - (family)Practices SVP
Did.You.Know❓Until the 1930s-1940s #LEFT-Handed #Ontario kids were (denied) #LeftHandEDness 🔚 #LEFtHandeR #HandEdNESS #Lefty #leftIE #LeftieS #SouthPaw #Canada #CanadIAN #CanadianS #cdn #cdnPoli

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Stuart Whyte

@realstuartwhyte.bsky.social

8 months ago

Watching #BBCSports #Wimbledon mens doubles live.
Rather taking exception to commentator's description of Pavic as the 'Croatian Leftie' due to his #handedness, which just sounds derogatory.
I think you may describe an object, eg guitar, golf club, bread knife etc as a leftie but not people.

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Geekoo

@handle.invalid

10 months ago

Left-Handedness Linked to Early-Onset Neurological Disorders A comprehensive study highlights a notable correlation between non-right-handedness and early-onset neurological disorders involving language impairments, offering new insights into brain development.

Left- or mixed-handed? New research links non-right-handedness to early-onset neurological disorders like autism and dyslexia. #Handedness #NeurologicalResearch #BrainDevelopment

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Dr Elsje van Bergen

@drelsje.bsky.social

11 months ago

Our top-cited study examined #handedness in over 6,800 children and adolescents across 10 cohorts. We found that those with language or reading impairments are slightly more likely to be left- or mixed-handed. doi.org/10.1111/cdev... led by Silvia Paracchini & Filippo Abbondanza
#dyslexia #DLD

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Anne Delong

@anne-delong.musician.social.ap.brid.gy

1 year ago

Original post on musician.social

@DavidM_yeg @futurebird

I started playing the violin after retirement. As a lefty, I struggled for a long time to maintain the correct bow hold while keeping a relaxed wrist. Then one day I happened to pick up the bow with my left hand, and automatically held it correctly, even though I had […]

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CureCoin_Team

@curecoin.bsky.social

1 year ago

Scientists Warn Against Creation of Mirror Life That May Cause an Extinction YouTube video by Anton Petrov

#mirrorlife could make for a great scary #scifi plot😱... This research is probably best left in the #insilico realm (except for VERY narrowly-focused applications). #foldingathome HT
@WhatDaMath #chirality #handedness #biology
youtu.be/FJcS4WTBWaA?...

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@cosmos4u.bsky.social

1 year ago

Prebiotic chiral transfer from self-aminoacylating ribozymes may favor either handedness - Nature Communications Life is homochiral, and prior work posited that D-RNA may interact preferentially with L-amino acids. Here, the authors show that self-aminoacylating D-RNAs do not have an intrinsic preference for L-a...

Prebiotic chiral transfer from self-aminoacylating ribozymes may favor either handedness: www.nature.com/articles/s41... -> Mystery of Life’s #Handedness Deepens: www.nasa.gov/science-rese...

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News Medical

@newsmedical.bsky.social

1 year ago

Clues from the Mary Rose: Bone chemistry reveals age and handedness of Tudor sailors Researchers used Raman spectroscopy to study bone chemistry in sailors from the Mary Rose, revealing aging patterns and potential handedness impacts on clavicles.

Clues from the Mary Rose: Bone chemistry reveals age and handedness of Tudor sailors ⚓📜🧬 www.news-medical.net/news/2024110... #MaryRose #History #RamanSpectroscopy #Bone #Chemistry #HenryVIII #Aging #Handedness #Archaeology #SkeletalAnalysis #Science @plos.bsky.social

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Dorothy Bishop

@deevybee.bsky.social

1 year ago

Just make it stop! When will we say that further research isn I have a lifelong interest in laterality, which is a passion that few people share. Accordingly, I am grateful to René Westerhausen who ...

A small rant about zombie ideas and the tendency to keep looking for modifications of study methods to avoid concluding that a null result is really null. deevybee.blogspot.com/2024/03/just...
#research #nullresults #laterality #handedness #publicationbias

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Jonathan Bernard

@jybernard.bsky.social

4 years ago

Is Handedness at Five Associated with Prenatal Factors? The goal of the study was to investigate some of the factors suspected to be related to children’s handedness: presentation during the last weeks of gestation and at birth (cephalic or breech), side of presentation (right or left), number of weeks of gestation, season of birth, parents’ handedness and sex. We analyzed the relationships between these factors and the child’s handedness at five years. Children (n = 1897) from the EDEN cohort participated in the study, among which 1129 were tested for handedness at five. The father’s handedness, but not the mother’s, was significantly related to the child’s hand preference. The percentage of left-handed children was significantly larger when the father was non-right-handed compared to right-handed, and tended to be larger among children in non-left-cephalic presentation compared to left-cephalic presentation. Girls, but not boys, were significantly less lateralized when they were born before 37 weeks of pregnancy than after. Finally, children born in winter or spring were slightly but significantly less lateralized than children born in summer or autumn. All six children who were not lateralized at 5 presented one or several of these factors. These results are discussed in light of the mixed model of handedness.

Is child handedness at age 5 years associated with prenatal factors?
Examination of parental #handedness, gestational age, side of presentation at birth, season of birth and child sex in the #EDENcohort

Here:via @MDPIOpenAccess

mdpi.com/1051874

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Ben Engel

@cellarchlab.com

5 years ago

Lockdown #TeamTomo Adventures, Day 328: Did you mirror the volume or flip it over? You can't tell by looking at a 2D slice through the volume. #CryoET #Handedness🖐️

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