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A Cineradiographic And Electromyographic Study Of Mastication In Tenrec Ecaudatus

U. Oron, A. Crompton
Published 1985 · Biology, Medicine

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Regular chewing was studied in the specialized Malagasy insectivore Tenrec ecaudatus with the aid of precisely correlated electromyography of the main adductors, digastrics, and two hyoid muscles and cineradiography for which metallic markers were placed in the mandibles, tongue, and hyoid bone. During the power stroke the body of the mandible moves dorsally and medially. The medially directed component of movement at this time is greatly increased by simultaneous rotation of the mandible about its longitudinal axis. The highly mobile symphysis, spherical dentary condyle, loss of superficial masseter muscle and zygoma, and the simplified zalamnodont molars all appear to be related to the large amount of mandibular rotation that occurs during occlusion. The balancing side lateral pterygoid muscle (inferior head) apparently shifts the working side mandible laterally during the last part of opening and the first part of closing. The working side temporalis and the superficial masseter muscle are both responsible for the shift back to the midline. The temporalis is usually active to the same extent on the working and balancing sides during the power stroke. The level of activity (amplitude) of the temporalis and duration of the power stroke increase with harder foods. Whenever soft foods are chewed, the superficial masseter is only active on the working side; whenever foods of increasing hardness are chewed, its level of activity on the balancing side increases to approach that of the working side. Mandibular rotation is greatly reduced when hard foods are chewed.
This paper references
10.1002/JMOR.1051760103
Aspects of masticatory form and function in common tree shrews, Tupaia glis
D. Fish (1983)
Mammalian mastication : a review of the activity of the jaw muscles and the movements they produce in chewing
K. Hiiemae (1978)
10.1002/JMOR.1051540305
Feeding in golden hamsters, Mesocricetus auratus
G. Gorniak (1977)
10.1152/JN.1980.44.3.456
Food consistency and bite size as regulators of jaw movement during feeding in the cat.
A. Thexton (1980)
10.1002/AJPA.1330510317
Experimental analysis of temporomandibular joint reaction force in macaques.
W. Hylander (1979)
10.1002/JMOR.1051670308
Morphological investigation into functions of the jaw symphysis in carnivorans
R. Scapino (1981)
10.1017/S0094837300006291
Mastication in the hyrax and its relevance to ungulate dental evolution
C. Janis (1979)
10.1002/JMOR.1051360402
Mastication in the little brown bat, Myotis lucifugus
F. Kallen (1972)
10.1002/JMOR.1051590208
Mandibular function in Galago crassicaudatus and Macaca fascicularis: An in vivo approach to Stress Analysis of the mandible
W. Hylander (1979)
10.1002/AJPA.1330470213
Function and fusion at the mandibular symphysis.
R. Beecher (1977)
10.1002/AJPA.1330400210
Jaw movement and tooth use in recent and fossil primates.
R. Kay (1974)
10.1016/0003-9969(77)90096-6
Strain in mandibular alveolar bone during mastication in the rabbit.
W. Weijs (1977)
10.1002/AJA.1001540410
Functional heterogeneity in a multipinnate muscle.
S. Herring (1979)
10.1002/JMOR.1051590109
Functional significance of the mandibular symphysis
R. Beecher (1979)
10.1016/0003-9969(75)90046-1
The twitch-contraction characteristics of opossum jaw musculature.
A. Thexton (1975)
10.1126/science.222.4629.1233
Mesozoic Mammals from Arizona: New Evidence on Mammalian Evolution
F. Jenkins (1983)
10.1002/JMOR.1051790109
Movements of the mandibles and tongue during mastication and swallowing in Pteropus giganteus (Megachiroptera): A cineradiographical study
D. G. Greet (1984)
10.1002/JMOR.1051160103
The third joint of the canine jaw
R. Scapino (1965)
10.5479/SI.00810282.27
Madagascan Insectivora. (Book Reviews: The Tenrecs. A Study in Mammalian Behavior and Evolution)
J. Eisenberg (1970)
10.1002/AJPA.1330460212
In vivo bone strain in the mandible of Galago crassicaudatus.
W. Hylander (1977)
10.1002/JMOR.1051630304
Quantitative assay of electromyograms during mastication in domestic cats (Felis catus)
G. Gorniak (1980)
10.1016/0003-9969(82)90032-2
Hyo-mandibular relationships during feeding in the cat.
A. Thexton (1982)
10.1016/0003-9969(81)90074-1
The movement of the cat hyoid during feeding.
K. Hiiemae (1981)
10.1111/J.1096-3642.1966.TB00081.X
The functional occlusion of the teeth of Insectivora
J. R. Mills (1966)
10.1002/JMOR.1051460102
Electromyography and mechanics of mastication in the albino rat
W. Weijs (1975)
10.1002/JMOR.1051600208
The functional significance of primate mandibular form
W. Hylander (1979)
10.1002/AJPA.1330580304
Mandibular movement patterns relative to food types in common tree shrews (Tupaia glis).
D. Fish (1982)
10.1159/000140831
DIE KAUMUSKULATUR DER INSECTIVORA
W. Fiedler (1953)
10.1007/978-1-349-02721-7_17
The activity of the jaw and hyoid musculature in the Virginian opossum, Didelphis virginiana
A. Crompton (1977)



This paper is referenced by
10.1038/s41598-020-79159-4
Molar occlusion and jaw roll in early crown mammals
K. Jäger (2020)
10.1002/jemt.22737
Localization and identification of crustacean hyperglycemic hormone producing neurosecretory cells in the eyestalk of blue swimmer crab, Portunus pelagicus
Saravanan Rajendiran (2016)
10.1016/0003-9969(94)90136-8
The electromyographic activities of jaw and hyoid musculature in different ingestive behaviours in the cat.
A. Thexton (1994)
10.1002/(SICI)1097-010X(19980401)280:5<327::AID-JEZ2>3.0.CO;2-Q
Transition from suckling to drinking at weaning: a kinematic and electromyographic study in miniature pigs.
A. Thexton (1998)
10.2992/0097-4463(2007)76[73:AECMFT]2.0.CO;2
AN EARLY CRETACEOUS MAMMAL FROM THE KUWAJIMA FORMATION (TETORI GROUP), JAPAN, AND A REASSESSMENT OF TRICONODONT PHYLOGENY
G. W. Rougier (2007)
10.1098/rspb.2016.1392
Always chew your food: freshwater stingrays use mastication to process tough insect prey
M. Kolmann (2016)
10.1002/(SICI)1097-4687(199904)240:1<1::AID-JMOR1>3.0.CO;2-D
Mechanical advantage of area of origin for the external pterygoid muscle in two murid rodents, Apodemus speciosus and Clethrionomys rufocanus
K. Satoh (1999)
10.1007/BF01974562
A new marker technique in cineradiography for the recording of movements in small vertebrates —Application to the study of jaw movements in soricids (Insectivora)
R. Dantuma (2005)
10.1007/PL00009591
Difference in the Burst Patterns of Digastric and Mylohyoid Activities during Feeding in the Freely Behaving Rabbit
Y. Meng (1999)
10.1016/j.jhevol.2008.04.001
Food material properties and mandibular load resistance abilities in large-bodied hominoids.
A. Taylor (2008)
10.1002/JEZ.1402500302
Effect of sensory input from the tongue on jaw movement in normal feeding in the opossum.
A. Thexton (1989)
Functional Morphology of Mastication in Musteloid Carnivorans
J. Davis (2014)
10.1002/AJP.20189
Mechanical properties of foods used in experimental studies of primate masticatory function
S. Williams (2005)
10.1007/978-3-642-57906-6_10
Evolutionary Approach of Masticatory Motor Patterns in Mammals
W. Weijs (1994)
10.1038/s41598-020-63376-y
Muscle architecture dynamics modulate performance of the superficial anterior temporalis muscle during chewing in capuchins
Myra F Laird (2020)
10.1002/1096-8644(200008)112:4<517::AID-AJPA7>3.0.CO;2-4
Why fuse the mandibular symphysis? A comparative analysis.
D. Lieberman (2000)
10.1080/02724634.1988.10011681
The Early Cretaceous mammal Gobiconodon (Mammalia, Triconodonta) from the Cloverly Formation in Montana
F. Jenkins (1988)
10.1159/000061101
The Control of Swallowing
A. Thexton (1998)
10.7717/peerj.9690
Comparative masticatory myology in anteaters and its implications for interpreting morphological convergence in myrmecophagous placentals
S. Ferreira-Cardoso (2020)
10.1016/j.jhevol.2009.02.007
Ecological consequences of scaling of chew cycle duration and daily feeding time in primates.
C. Ross (2009)
10.1111/j.1469-7580.2006.00584.x
Dynamic mechanics in the pig mandibular symphysis
G. Langenbach (2006)
10.1016/S0003-9969(00)00015-7
Quantification of human chewing-cycle kinematics.
P. Buschang (2000)
Movements of the Dentaries at the Symphyseal Joint in the Goat during Mastication
Ben Amer (2012)
10.1017/CBO9780511735011.006
Dental Functional Morphology: Tooth shape
P. Lucas (2004)
10.1007/978-0-387-33507-0_6
Jaw-Muscle Function and the Origin of Primates
C. Vinyard (2007)
10.1016/B978-012632590-4/50003-4
CHAPTER 2 – An Introduction to Tetrapod Feeding
K. Schwenk (2000)
10.1017/CBO9780511735011.004
Dental Functional Morphology: The basic structure of the mammalian mouth
P. Lucas (2004)
10.1017/S0094837300010198
A functional interpretation of the masticatory system and paleoecology of entelodonts
R. M. Joeckel (1990)
10.1017/CBO9780511735011.002
Dental Functional Morphology: Flickart
P. Lucas (2004)
10.1093/ICB/ICM044
Modulation of intra-oral processing in mammals and lepidosaurs.
C. Ross (2007)
10.1111/J.1096-3642.1989.TB02314.X
Enamel ultrastructure and masticatory function in molars of the American opossum, Didelphis virginiana
D. Stern (1989)
10.1007/s10914-005-5725-3
Locking Yourself Out: Diversity Among Dentally Zalambdodont Therian Mammals
R. Asher (2005)
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