Jaw Elevator Muscle Coordination during Rhythmic Mastication in Primates: Are Triplets Units of Motor Control?
Chewing
Coordination
Relative phase
Synchrony
Unison
Journal
Brain, behavior and evolution
ISSN: 1421-9743
Titre abrégé: Brain Behav Evol
Pays: Switzerland
ID NLM: 0151620
Informations de publication
Date de publication:
2020
2020
Historique:
received:
13
03
2018
accepted:
01
10
2019
pubmed:
11
12
2019
medline:
16
6
2021
entrez:
11
12
2019
Statut:
ppublish
Résumé
The activity of mammal jaw elevator muscles during chewing has often been described using the concept of the triplet motor pattern, in which triplet I (balancing side superficial masseter and medial pterygoid; working side posterior temporalis) is consistently activated before triplet II (working side superficial masseter and medial pterygoid; balancing side posterior temporalis), and each triplet of muscles is recruited and modulated as a unit. Here, new measures of unison, synchrony, and coordination are used to determine whether in 5 primate species (Propithecus verreauxi, Eulemur fulvus, Papio anubis, Macaca fuscata,and Pan troglodytes)muscles in the same triplet are active more in unison, are more synchronized, and are more highly coordinated than muscles in different triplets. Results show that triplet I muscle pairs are active more in unison than other muscle pairs in Eulemur, Macaca, and Papio,buttriplet muscle pairs are mostly not more tightly synchronized than non-triplet pairs. Triplet muscles are more coordinated during triplet pattern cycles than non-triplet cycles, while non-triplet muscle pairs are more coordinated during non-triplet cycles than triplet cycles. These results suggest that the central nervous system alters patterns of coordination between cycles, recruiting triplet muscles as a coordinated unit during triplet cycles but employing a different pattern of muscle coordination during non-triplet cycles. The triplet motor pattern may simplify modulation of rhythmic mastication by being one possible unit of coordination that can be recruited on a cycle-to-cycle basis.
Identifiants
pubmed: 31821998
pii: 000503890
doi: 10.1159/000503890
pmc: PMC7101269
mid: NIHMS1056293
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
1-14Subventions
Organisme : NIDCR NIH HHS
ID : R01 DE023816
Pays : United States
Organisme : NINDS NIH HHS
ID : R01 NS111982
Pays : United States
Informations de copyright
© 2019 S. Karger AG, Basel.
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