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.author | McNamara, James A. Jr. | en_US |
dc.date.accessioned | 2007-04-06T17:42:53Z | |
dc.date.available | 2007-04-06T17:42:53Z | |
dc.date.issued | 1973-10 | en_US |
dc.identifier.citation | McNamara, 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.issn | 0002-9106 | en_US |
dc.identifier.issn | 1553-0795 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/49666 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=4201159&dopt=citation | en_US |
dc.description.abstract | Investigations 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.extent | 760846 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Wiley Subscription Services, Inc., A Wiley Company | en_US |
dc.subject.other | Life and Medical Sciences | en_US |
dc.subject.other | Cell & Developmental Biology | en_US |
dc.title | 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 | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Medicine (General) | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Anatomy and Center for Human Growth and Development, The University of Michigan, Ann Arbor, Michigan 48104 | en_US |
dc.identifier.pmid | 4201159 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/49666/1/1001380206_ftp.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1002/aja.1001380206 | en_US |
dc.identifier.source | American Journal of Anatomy | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.