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Text
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URL Address
<a href="http://doi.org/10.1002/ar.24521" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/ar.24521</a>
ISSN
1932-8494
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Update Year & Number
September 2020 List
NEOMED College
NEOMED College of Medicine
NEOMED Department
Department of Anatomy & Neurobiology
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Title
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Cranial synchondroses of primates at birth.
Publisher
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Anatomical Record
Date
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2020
2020-10-04
Subject
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Development; Craniofacial; Perinatal; Chondrocranium
Creator
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Smith TD;Reynolds RL;Mano N;Wood BJ;Oladipupo L;Hughes GK;Corbin HM;Taylor J;Ufelle A;Burrows AM;Durham E;Vinyard CJ;Cray JJ;DeLeon VB
Description
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Cranial synchondroses are cartilaginous joints between basicranial bones or between basicranial bones and septal cartilage, and have been implicated as having a potential active role in determining craniofacial form. However, few studies have examined them histologically. Using histological and immunohistochemical methods, we examined all basicranial joints in serial sagittal sections of newborn heads from nine genera of primates (five anthropoids, four strepsirrhines). Each synchondrosis was examined for characteristics of active growth centers, including a zonal distribution of proliferating and hypertrophic chondrocytes, as well as corresponding changes in matrix characteristics (i.e., density and organization of type II collagen). Results reveal three midline and three bilateral synchondroses possess attributes of active growth centers in all species (sphenooccipital, intrasphenoidal, presphenoseptal). One midline synchondrosis (ethmoseptal) and one bilateral synchondrosis (alibasisphenoidal, ABS) are active growth centers in some but not all newborn primates. ABS is oriented more anteriorly in monkeys compared to lemurs and bushbabies. The sphenoethmoidal synchondrosis (SES) varies at birth: in monkeys, it is a suture-like joint (i.e., fibrous tissue between the two bones); however, in strepsirrhines, the jugum sphenoidale is ossified while the mesethmoid remains cartilaginous. No species possesses a SES that has the organization of a growth plate. Overall, our findings demonstrate that only four midline synchondroses have the potential to actively affect basicranial angularity and facial orientation during the perinatal timeframe, while the SES of anthropoids essentially transitions toward a "suture-like" function, permitting passive growth postnatally. Loss of cartilaginous continuity at SES and reorientation of ABS distinguish monkeys from strepsirrhines. This article is protected by copyright. All rights reserved. (This article is protected by copyright. All rights reserved.)
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<a href="http://doi.org/10.1002/ar.24521" target="_blank" rel="noreferrer noopener">10.1002/ar.24521</a>
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journalArticle
2020
Anatomical Record
Burrows AM
Chondrocranium
Corbin HM
Craniofacial
Cray JJ
DeLeon VB
Department of Anatomy & Neurobiology
development
Durham E
Hughes GK
journalArticle
Mano N
NEOMED College of Medicine
Oladipupo L
Perinatal
Reynolds RL
September 2020 List
Smith TD
Taylor J
Ufelle A
Vinyard CJ
Wood BJ