journal
https://read.qxmd.com/read/37139692/the-sinister-story-of-a-gauche-deliverer-and-his-corrie-fisted-tribesmen-ehud-and-the-left-handed-artillery
#21
JOURNAL ARTICLE
Alex G Stewart, Alan R Millard
Bias against left-handers is well-documented and seen in the etymology of "left" and "right" in most languages. The subject of this study, Ehud, lived between the exodus of the Hebrew slaves from Egypt and the establishment of the Israelite kingdom (c1200-1000 BC), at the transition between the Late Bronze Age and Iron Age 1. His left-handedness was crucial to his deliverance of the proto-nation from tyranny, recorded in Judges in the Hebrew Bible. The description of Ehud as left-handed ( 'iṭṭēr yaḏ-yεmînô ) is used once more in the Hebrew Bible, also in Judges, to describe the artillery of Ehud's tribe...
May 4, 2023: Laterality
https://read.qxmd.com/read/37099727/stress-exposure-hand-preference-and-hand-skill-a-deep-phenotyping-approach
#22
JOURNAL ARTICLE
Annakarina Mundorf, Stephan Getzmann, Patrick D Gajewski, Mauro F Larra, Edmund Wascher, Sebastian Ocklenburg
ABSTRACT Stress exposure and reactivity may show differential associations with handedness, but shallow phenotyping may influence the current knowledge. Importantly, different handedness measures do not necessarily show high correlations with each other and should not be used interchangeably as they may reflect different dimensions of laterality. Here, data on handedness from 599 participants in the population-based, longitudinal Dortmund Vital Study was used to determine various asymmetry indices. Hand preference was assessed with the Edinburgh Handedness Inventory (EHI) and the lateral preference inventory (LPI) measuring handedness, footedness, earedness, and eyedness...
April 26, 2023: Laterality
https://read.qxmd.com/read/36856607/compromised-bilaterality-in-the-small-african-pangolin-phataginus-tricuspis-an-expression-of-or-compensation-for-developmental-errors-asymmetry-elliptical-fourier-analyses-and-modularity
#23
JOURNAL ARTICLE
O Michael Samuel, O Mayowa Igado, A Joan Adekanmbi
We present a postnatal evaluation of skull developmental signaling in small African pangolin emphasizing structural, and cognitive trend in ontogeny for assessment of developmental instability, proper identification and classification, forty digitally processed skulls and foramen magnum from different geo-locations were assessed for asymmetry, foramen magnum shape and modularity using geometric and Elliptical Fourier analyses. Multivariate analysis of regression demonstrated low (p < 0.5) but directional fluctuating asymmetry (F1539 = 3...
March 1, 2023: Laterality
https://read.qxmd.com/read/36803667/dual-task-decrements-in-mono-bi-and-multilingual-participants-evidence-for-multilingual-advantage
#24
JOURNAL ARTICLE
Sameera M Sidat, Anastasia Giannakopoulou, Christopher J Hand, Joanne Ingram
Evidence suggests that language processing in bilinguals is less left-lateralized than in monolinguals. We explored dual-task decrement (DTD) for mono-, bi- and multilinguals in a verbal-motor dual-task paradigm. We expected monolinguals to show greater DTD than bilingual participants, who would show greater DTD than multilingual participants. Fifty right-handed participants (18 monolingual, 16 bilingual, 16 multilingual) completed verbal fluency and manual motor tasks in isolation and concurrently. Tasks were completed twice in isolation (left-handed, right-handed) and twice as dual-tasks (left-handed, right-handed); participants' motor-executing hands served proxy for hemispheric activation...
February 19, 2023: Laterality
https://read.qxmd.com/read/36859828/consistency-of-limb-preference-across-unimanual-feeding-bipedal-locomotion-and-social-grooming-in-golden-snub-nosed-monkeys-rhinopithecus-roxellana
#25
JOURNAL ARTICLE
Weiwei Fu, Jianghui Xu, Xiaowei Wang, Yongbo Li, Shujun He, Chengliang Wang, Yi Ren, Bin Yang, Tong Wu, Yan Wang, Baoguo Li
The golden snub-nosed monkey ( Rhinopithecus roxellana ) is a typical arboreal group-living Old World primate. While limb preference has been extensively studied in this species, limb preference consistency has not yet been explored. Here, based on 26 R. roxellana adults, we investigated whether individuals exhibit consistent motor biases in manual- (e.g., unimanual feeding and social grooming) and foot-related (e.g., bipedal locomotion) tasks and whether limb preference consistency is influenced by increased social interactions during social grooming...
January 2023: Laterality
https://read.qxmd.com/read/36448725/righteous-adam-sinister-eve
#26
JOURNAL ARTICLE
Sergio Della Sala, Robert D McIntosh
The symbolism of laterality in images implies that the virtuous figure is represented on the right of the scene whereas the sinful character is depicted on the left. In portraits of male and female characters this has reflected and reinforced stereotypes and inequalities down the ages. Given these premises, we hypothesized that the prototypical representations of Adam and Eve, as a man and a woman conflated with notions of virtue and vice, would show a non-random arrangement. We tested this hypothesis, sampling artistic depictions of the Garden of Eden, from the twelth century to the present day in three separately-collected series of 100, 99, and 142 images respectively...
November 30, 2022: Laterality
https://read.qxmd.com/read/36416485/a-meta-analysis-of-the-line-bisection-task-in-children
#27
JOURNAL ARTICLE
Danishta Kaul, Marietta Papadatou-Pastou, Gemma Learmonth
Meta-analyses have shown subtle, group-level asymmetries of spatial attention in adults favouring the left hemispace (pseudoneglect). However, no meta-analysis has synthesized data on children. We performed a random-effects meta-analysis of spatial biases in children aged ≤16 years. Databases (PsycINFO, Web of Science & Scopus) and pre-print servers (bioRxiv, medRxiv & PsyArXiv) were searched for studies involving typically developing children with a mean age of ≤16, who were tested using line bisection...
November 23, 2022: Laterality
https://read.qxmd.com/read/36744679/announcement
#28
JOURNAL ARTICLE
(no author information available yet)
No abstract text is available yet for this article.
November 2022: Laterality
https://read.qxmd.com/read/36205529/testing-the-relationship-between-lateralization-on-sequence-based-motor-tasks-and-language-laterality-using-an-online-battery
#29
JOURNAL ARTICLE
Jack H Grant, Adam J Parker, Jessica C Hodgson, John M Hudson, Dorothy V M Bishop
ABSTRACT Studies have highlighted an association between motor laterality and speech production laterality. It is thought that common demands for sequential processing may underlie this association. However, most studies in this area have relied on relatively small samples and have infrequently explored the reliability of the tools used to assess lateralization. We, therefore, established the validity and reliability of an online battery measuring sequence-based motor laterality and language laterality before exploring the associations between laterality indices on language and motor tasks...
October 7, 2022: Laterality
https://read.qxmd.com/read/36065480/relationships-between-footedness-and-aging-on-postural-control-evidence-from-the-yakumo-study
#30
JOURNAL ARTICLE
Takeshi Hatta, Kazumi Fujiwara, Yukiharu Hasegawa
ABSTRACT The effects of footedness and aging on postural maintenance function were examined in this study. Using the postural maintenance task, the trajectories of the centre of pressure (COP) were measured with a stabilometer in the lateral and posterior/anterior directions. One hundred and ninety-three right-footers (112 middle-aged: 40-64 years old and 81 old-aged: 65-80 years old) and thirty-two left-footers (14 middle-aged and 18 old-aged) among healthy community members participated in this study. Using the ratio of the COP deviation area sizes for the open- vs...
September 5, 2022: Laterality
https://read.qxmd.com/read/35974663/reduction-in-manual-asymmetry-and-decline-in-fine-manual-dexterity-in-right-handed-older-adults-with-mild-cognitive-impairment
#31
JOURNAL ARTICLE
Olena Vasylenko, Marta M Gorecka, Knut Waterloo, Claudia Rodríguez-Aranda
Research in Parkinson's or Alzheimer's disease suggests that hand function is affected by neurodegenerative diseases. However, little is known about the relationship between hand function and mild cognitive impairment (MCI). Therefore, we conducted a kinematic analysis of unimanual hand movements in MCI patients to answer whether manual asymmetries and manual dexterity are affected or preserved in this condition. Forty-one MCI patients and fifty healthy controls were tested with the Purdue Pegboard test. All participants were right-handed...
August 16, 2022: Laterality
https://read.qxmd.com/read/35948519/homotopicli-rationale-characteristics-and-implications-of-a-new-threshold-free-lateralization-index-of-functional-magnetic-resonance-imaging
#32
JOURNAL ARTICLE
Kayako Matsuo, Kenta Kono, Norio Yasui-Furukori, Kazutaka Shimoda, Yasushi Kaji, Kazufumi Akiyama
The reliable preoperative estimation of brain hemispheric asymmetry may be achieved through multiple lateralization indices using functional magnetic resonance imaging. Adding to our previously developed AveLI, we devised a novel threshold-free lateralization index, HomotopicLI, which computes a basic formula, (Left - Right) / (Left + Right), using voxel values of pairs located symmetrically in relation to the midsagittal line as the terms Left and Right, and averages them within the regions-of-interest...
August 10, 2022: Laterality
https://read.qxmd.com/read/35940957/on-line-bisection-validity-and-reliability-of-online-measures-of-pseudoneglect
#33
JOURNAL ARTICLE
Alexandra G Mitchell, Paulina O Kandt, Robert D McIntosh
This study assessed pseudoneglect using line bisection and perceptual landmark tasks in two matched online sessions. Line bisection bias was characterized by the traditional measure of Directional Bisection Error (DBE), and by Endpoint Weightings Bias (EWB), derived from an "endpoint weightings" analysis, made possible by the independent manipulation of left and right endpoints. EWB is proposed to index the relative attentional allocation to the two ends of the line. The expected leftward bias (pseudoneglect) was found, with larger effect sizes for EWB ( d  = -0...
August 8, 2022: Laterality
https://read.qxmd.com/read/35938410/a-longitudinal-examination-of-perinatal-testosterone-estradiol-and-vitamin-d-as-predictors-of-handedness-outcomes-in-childhood-and-adolescence
#34
JOURNAL ARTICLE
Gareth Richards, Diana Weiting Tan, Andrew J O Whitehouse, I Chris McManus, Alan A Beaton, Martha Hickey, Murray T Maybery, Melissa K Licari, Lauren Lawson
The developmental origins of handedness remain elusive, though very early emergence suggests individual differences manifesting in utero could play an important role. Prenatal testosterone and Vitamin D exposure are considered, yet findings and interpretations remain equivocal. We examined n = 767 offspring from a population-based pregnancy cohort (The Raine Study) for whom early biological data and childhood/adolescent handedness data were available. We tested whether 18-week maternal circulatory Vitamin D (25[OH]D), and testosterone and estradiol from umbilical cord blood sampled at birth predicted variance in direction of hand preference (right/left), along with right- and left-hand speed, and the strength and direction of relative hand skill as measured by a finger-tapping task completed at 10 (Y10) and/or 16 (Y16) years...
August 6, 2022: Laterality
https://read.qxmd.com/read/35859522/the-examination-of-the-visual-perceptual-locus-in-hemispheric-laterality-of-the-word-length-effect-using-korean-visual-word
#35
JOURNAL ARTICLE
Sangyub Kim, Changhwan Lee, Kichun Nam
Greater word length effects have been reported when a word was presented in the left visual field (LVF) than when presented in the right visual field (RVF). The current study employed 2 experiments to examine the visual-perceptual loci of asymmetric word length effect while testing the physical and linguistic length effects and the effect of visual angle increase at the RVF. Experiment 1 showed significant effects on the number of strokes in both VHFs (visual half fields) with the added significance of the number of syllables in the LVF, suggesting both parafoveal fields were affected by the physical length factors in contrast with the linguistic length factors, inducing asymmetric word length effects in the symmetrically presented word recognition in parafoveal vision...
July 20, 2022: Laterality
https://read.qxmd.com/read/35833319/modulation-of-behavioural-laterality-in-wild-new-caledonian-crows-corvus-moneduloides-vocalization-age-and-function
#36
JOURNAL ARTICLE
Cyrielle Mack, Natalie Uomini
The New Caledonian crow ( Corvus moneduloides ) is known for displaying a unique set of tool-related behaviours, with the bird's bill acting as an individually consistently lateralized effector. However, we still fail to understand how such laterality develops, is modulated or even if its expression is consistent across other behavioural categories. Creating the first ethogram for this species allowed us to examine laterality and vocalisations in a population of wild, free-flying New Caledonian crows using detailed analyses of close-up video footage...
July 14, 2022: Laterality
https://read.qxmd.com/read/35729774/who-goes-where-in-couples-and-pairs-effects-of-sex-and-handedness-on-side-preferences-in-human-dyads
#37
JOURNAL ARTICLE
Paul Rodway, Astrid Schepman
There is increasing evidence that inter-individual interaction among conspecifics can cause population-level lateralization. Male-female and mother-infant dyads of several non-human species show lateralised position preferences, but such preferences have rarely been examined in humans. We observed 430 male-female human pairs and found a significant bias for males to walk on the right side of the pair. A survey measured side preferences in 93 left-handed and 92 right-handed women, and 96 left-handed and 99 right-handed men...
June 21, 2022: Laterality
https://read.qxmd.com/read/35688604/investigating-the-influence-of-neuter-status-on-paw-preference-in-dogs-and-cats
#38
JOURNAL ARTICLE
Amelia Duncan, Tim Simon, Elisa Frasnelli
Motor lateralization is commonly observed through preferential paw use in dogs and cats. Previous studies have uncovered sex-related differences in paw preference, hypothesizing that these differences may be related to sex hormones. The current study aimed to compare neutered and entire individuals to further investigate whether paw preference is influenced by sex hormones. Dog and cat owners were required to fill in a questionnaire with demographic information such as sex and neuter status of their pets. They then carried out two simple paw preference tasks within their homes: a "reaching for food" task and a "reaching for a toy" task...
June 10, 2022: Laterality
https://read.qxmd.com/read/35588260/putting-your-best-face-forward-posing-biases-in-psychologists-online-portraits
#39
JOURNAL ARTICLE
Ven Yi Hew, Annukka K Lindell
When posing for portraits the position you adopt influences perceptions. As the left hemiface (controlled by the emotion-dominant right hemisphere) expresses emotion more intensely, left cheek portraits communicate stronger emotion than right cheek portraits. This phenomenon influences perceptions of both emotional expressivity and professional specialisation: while left cheek portraits emphasise emotion, right cheek portraits appear more scientific. When professionals upload photographs online to promote their services, the cheek shown consequently influences perceptions...
May 19, 2022: Laterality
https://read.qxmd.com/read/34836486/the-effects-of-sex-and-handedness-on-masturbation-laterality-and-other-lateralized-motor-behaviours
#40
JOURNAL ARTICLE
Paul Rodway, Volker Thoma, Astrid Schepman
Masturbation is a common human behaviour. Compared to other unimanual behaviours it has unique properties, including increased sexual and emotional arousal, and privacy. Self-reported hand preference for masturbation was examined in 104 left-handed and 103 right-handed women, and 100 left-handed and 99 right-handed men. Handedness (modified Edinburgh Handedness Inventory, EHI), footedness, eyedness, and cheek kissing preferences were also measured. Seventy nine percent used their dominant hand (always/usually) for masturbation, but left-handers (71...
May 2022: Laterality
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