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The independent functions of the two heads of the lateral pterygoid muscle This research was supported in part by United States Public Health Service grants HD-02272 and DE-03610

dc.contributor.authorMcNamara, James A. Jr.en_US
dc.date.accessioned2007-04-06T17:42:53Z
dc.date.available2007-04-06T17:42:53Z
dc.date.issued1973-10en_US
dc.identifier.citationMcNamara, James A. (1973)."The independent functions of the two heads of the lateral pterygoid muscle This research was supported in part by United States Public Health Service grants HD-02272 and DE-03610 ." American Journal of Anatomy 138(2): 197-205. <http://hdl.handle.net/2027.42/49666>en_US
dc.identifier.issn0002-9106en_US
dc.identifier.issn1553-0795en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/49666
dc.identifier.urihttp://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=4201159&dopt=citationen_US
dc.description.abstractInvestigations on the role of the lateral pterygoid muscle in mandibular movements have been limited due to difficulties in obtaining consistent neuromuscular recordings in human subjects. The rhesus monkey was used as a substitute experimental animal. Thirty-three Macaca mulatta were monitored in 113 electromyographic recording sessions. Two distinct functional patterns were identified from the region of the lateral pterygoid muscle, depending upon the location of the electrodes within this muscle. Through anatomical dissection of areas of electrode placement in 12 animals, the two patterns of activity were related to the inferior and superior heads of the lateral pterygoid muscle. The inferior head acted synergistically with the suprahyoid muscle group in opening movements of the mandible. No activity was noted in closing movements, or in swallowing. In contrast, the superior head was not active during opening movements. Electromyographic activity of the superior head, antagonistic to the suprahyoid muscles, was observed during such closing movements as chewing and clenching of the teeth and during deglutition. The superior head presumably positioned or stabilized the condylar head and disc against the articular eminence during closing movements of the mandible, while the inferior head assisted in the translation of the condylar head downward, anteriorly, and contralaterally during opening movements. Thus, the two heads of the lateral pterygoid can be considered as two functionally distinct muscles.en_US
dc.format.extent760846 bytes
dc.format.extent3118 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.publisherWiley Subscription Services, Inc., A Wiley Companyen_US
dc.subject.otherLife and Medical Sciencesen_US
dc.subject.otherCell & Developmental Biologyen_US
dc.titleThe independent functions of the two heads of the lateral pterygoid muscle This research was supported in part by United States Public Health Service grants HD-02272 and DE-03610en_US
dc.typeArticleen_US
dc.rights.robotsIndexNoFollowen_US
dc.subject.hlbsecondlevelMedicine (General)en_US
dc.subject.hlbtoplevelHealth Sciencesen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Anatomy and Center for Human Growth and Development, The University of Michigan, Ann Arbor, Michigan 48104en_US
dc.identifier.pmid4201159en_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/49666/1/1001380206_ftp.pdfen_US
dc.identifier.doihttp://dx.doi.org/10.1002/aja.1001380206en_US
dc.identifier.sourceAmerican Journal of Anatomyen_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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