Function and fusion at the mandibular symphysis
Bibliographic Data
| ID | 8316893 |
|---|---|
| Authors | Robert M Beecher (Duke University, corresponding author) |
| Year | 1977 |
| Volume | 47 |
| Issue | 2 |
| Pages | 325-335 |
| Publication date | 1977-09-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | American Journal of Physical Anthropology (JOURNAL) |
| Journal identifiers | ISSN: 0002-9483 • E-ISSN: 1096-8644 |
| Publisher | Wiley (PUBLISHER • GB) |
| DOI | 10.1002/ajpa.1330470213 |
| PMID | 410309 |
| OpenAlex | W1997354394 |
| Language | EN |
| Citations received | 53 |
| References cited | 20 |
The purpose of this investigation is to determine the functional significance of a fused mandibular symphysis, characteristic of all Anthropoidea. The trait may date to the origins of the suborder. A histological study of 11 prosimian species determined the anatomy of the symphysis. A cinefluorographic film of Galago crassicaudatus mastication was studied to identify movements at the symphysis. A similar pattern of fibrocartilage and ligaments characterizes all prosimians studied. These tissues are arranged to resist (a) movements seen during mastication in G. crassicaudatus , i.e., antero‐posterior shear and spreading of the inferior borders of the symphysis and (b) hypothesized dorso‐ventral shear resulting from the transfer of force from the balancing side muscles to the bite point. Partial fusion of the symphysis was found in the folivorous species Lemur fulvus, L. macaco, Propithecus verreauxi , and Hapalemur griseus. Only those tissues associated with resisting occlusally or dorso‐ventrally directed forces were calcifying or ossifying. This research suggests that the added occlusal force necessary for leaf‐eating has resulted in the evolution of varying degrees of symphyseal fusion in the above species. It is suggested that the protoanthropoids also ate tough foods that required relatively large bite forces
Biology · Galago · Lemur · Mandibular symphysis · Mastication · Pelvis · Primate · Prosimian · Pubic symphysis · Symphysis · Amphibian and Reptile Biology · Anatomy · Evolution and Paleontology Studies · Primate Behavior and Ecology
Reconstructing the Diets of Fossil Primates
On the Interface between Ontogeny and Function
Mandibular morphometric variation among Chinese cercopithecoids and the unique structure of the snub-nosed monkey (Rhinopithecus) mandible
Mandibular Symphysis of Large-Bodied Hominoids
Dental and cranial adaptations in Eocene Adapidae
Function and Fusion of the Mandibular Symphysis in Primates
The Craniofacial Evidence for Anthropoid and Tarsier Relationships
Literaturverzeichnis
Dental Functional Morphology
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A mandible ofBranisella boliviana (Platyrrhini, Primates) from the oligocene of South America
The phylogenetic position ofMahgarita stevensi
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Mandibular symphysis (medial suture) closure in modern Homo sapiens
Mandibular growth and function in Archaeolemur
Masticatory stress, orbital orientation and the evolution of the primate postorbital bar
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New fossils from Tadkeshwar Mine (Gujarat, India) increase primate diversity from the early Eocene Cambay Shale
In vivo bone strain in the mandibular corpus of Sapajus during a range of oral food processing behaviors
Jaw-Muscle Structure and Function in Primates
Evolution of anthropoid jaw loading and kinematic patterns
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Into the Light
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Biomechanics of the mandible of Macaca mulatta during the power stroke of mastication
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| Unique citing works | 53 |
|---|---|
| Citations per year | 1,13 |
| Citation span | 1979 - 2025 (47) |
| Citation velocity | recent |
| Highly cited | No |
| Citation types | Neutral: 49 |