The relationship between facial directional asymmetry, handedness, chewing side preference, and eyedness

We aimed to describe facial directional asymmetry (DA) in individuals with different manifestations of laterality. Due to the overlap between brain and face development, a relationship between the manifestation of brain laterality and DA is hypothesised. These findings could clarify the relationship...

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Bibliographic Details
Published in:Scientific reports 2024-10, Vol.14 (1), p.23131-15, Article 23131
Main Authors: Harnádková, Katarína, Měšťák, Jan, Dupej, Ján, Jaklová, Lenka Kožejová, Kočandrlová, Karolina, Morávek, Alexander, Velemínská, Jana
Format: Article
Language:English
Subjects:
631/114/2400
631/136
692/698/1671
Adolescent
Adult
Asymmetry
Brain mapping
Chewing
Face - physiology
Facial Asymmetry - physiopathology
Female
Functional Laterality - physiology
Handedness
Hemispheric laterality
Humanities and Social Sciences
Humans
Jaw
Male
Males
Mastication - physiology
Middle Aged
multidisciplinary
Phenotypes
Science
Science (multidisciplinary)
Young Adult
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Summary:We aimed to describe facial directional asymmetry (DA) in individuals with different manifestations of laterality. Due to the overlap between brain and face development, a relationship between the manifestation of brain laterality and DA is hypothesised. These findings could clarify the relationship between the brain and facial phenotype and help to plan facial or oral motor rehabilitation. The DA of 163 healthy individuals was assessed by two complementary 3D methods: landmark and polygonal surface analysis using colour-coded maps. Handedness was assessed using the Edinburgh Handedness Inventory, while chewing side and eye preferences were self-reported. The results showed a similar DA pattern regardless of sex and laterality (the right-sided protrusion of the forehead, nose, lips, and chin) and a slightly curved C-shape of the midline in landmark analysis. A relationship between lateralized behaviours and DA was found only in males, in females the DA pattern was more homogenous. Right-handed individuals and right-side chewers showed a protrusion of the right hemiface. Males, left-handed and left-side chewers, manifested a protrusion of the left lateral hemiface. We suggest that these specific differences in males may be due to their typically higher level of brain asymmetry. No apparent relationship was found between eyedness and DA.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-73077-5