The Fetal Origin of the Human Chin
@article{Coquerelle2017TheFO, title={The Fetal Origin of the Human Chin}, author={Michael Coquerelle and Juan Carlos Prados-Frutos and Rosa Rojo and Abby Grace Drake and Jorge Alfonso Murillo-Gonz{\'a}lez and Philipp Mitteroecker}, journal={Evolutionary Biology}, year={2017}, volume={44}, pages={295-311} }
The chin prominence is a hallmark of the modern human face and bears on its labial surface an inverted-T bony relief. Evolutionarily, whether the human chin is an adaptation for mastication or speech is debated but there is little compelling data supporting either claim. Furthermore, some suggest that the inverted-T relief is more important for phylogenetic inference than the chin prominence. However, there is no evidence for the developmental independence of the inverted-T relief and chin…
4 Citations
A 3D analysis of growth trajectory and integration during early human prenatal facial growth
- MedicineScientific reports
- 2021
This work applied quantitative geometric morphometrics to high-resolution magnetic resonance images of human embryo and fetuses to assess integrated epigenetic growth between masticatory muscles and associated bones and showed that the growth trajectory of the human face in the early prenatal period follows a curved line with three flexion points.
Oblique human symphyseal angle is associated with an evolutionary rate-shift early in the hominin clade.
- BiologyJournal of human evolution
- 2018
Application of geometric morphometrics for facial congenital anomaly studies
- MedicineCongenital anomalies
- 2022
Geometric morphometrics (GM) uses shape configurations, including anatomical landmarks, which can retain geometric information throughout analysis and can help visualize the results, making it tremendously advantageous compared to conventional methods.
A cadaveric analysis of anatomical variations of the anterior belly of the digastric muscle.
- Medicine, BiologyFolia morphologica
- 2020
The frequency of ABDM and AB accessory muscle variations in cadavers donated to the UC Davis Body Donation Program was determined and three previously unreported types of variations were identified.
References
SHOWING 1-10 OF 98 REFERENCES
Short Faces, Big Tongues: Developmental Origin of the Human Chin
- BiologyPloS one
- 2013
It is demonstrated that in both humans and chimpanzees, the forward displacement of the mental region derives from the arrangement of the tongue and hyoid bone, in order to cope with the relative horizontal narrowing of the oral cavity.
Functional morphology of the human chin
- Biology
- 2005
When the morphology of the chin is considered in light of experimental data on mastication, its evolution can be interpreted as a consequence of recent changes in mandibular proportions that have altered the relative importance of different masticatory stresses.
Tongue contractions during speech may have led to the development of the bony geometry of the chin following the evolution of human language: a mechanobiological hypothesis for the development of the human chin.
- BiologyMedical hypotheses
- 2007
Fetal and infant growth patterns of the mandibular symphysis in modern humans and chimpanzees (Pan troglodytes)
- BiologyJournal of anatomy
- 2010
The results reveal that the symphysis is anteriorly inclined in the youngest chimpanzee fetuses but develops an increasingly vertical orientation up until birth, which could be a key event for emergence of the deciduous canine.
Infant growth patterns of the mandible in modern humans: a closer exploration of the developmental interactions between the symphyseal bone, the teeth, and the suprahyoid and tongue muscle insertion sites
- MedicineJournal of anatomy
- 2013
The results suggest that the presence of a prominent mental region responds to the space restriction at the back of the vocal tract, and to the packaging of the tongue and suprahyoid muscles in order to preserve the functionality of the laryngopharynx during respiration, feeding and speech.
The Human Mandible and the Origins of Speech
- Biology
- 2012
The potential covariation between the expression of the chin and bone hypertrophy is explored in an attempt to clarify their respective biomechanical roles.
The human chin revisited: what is it and who has it?
- GeographyJournal of human evolution
- 2000
The essential features of symphyseal morphology in H. sapiens are pointed out, which are present and well-defined in the fetus at least as early as the fifth gestational month and serve to emphasize the importance of studying this region in juveniles whenever possible.
The enduring puzzle of the human chin
- BiologyEvolutionary anthropology
- 2016
A century's worth of chin hypotheses are reviewed and future research avenues that may provide greater insight into this human peculiarity are discussed.
Development of human craniofacial morphology during the late embryonic and early fetal periods.
- MedicineAmerican journal of orthodontics
- 1985
Why do humans have chins? Testing the mechanical significance of modern human symphyseal morphology with finite element analysis.
- BiologyAmerican journal of physical anthropology
- 2011
The results of this study corroborate prior hypotheses about the mechanical effects of the human chin and vertical symphysis orientation and support the idea that the relative importance of wishboning and vertical bending in the coronal plane might have played a role in the evolution of modern human symphyseal morphology.