Blind mole rat (Spalax leucodon) masseter muscle: structure, homology, diversification and nomenclature.
Spalax leucodon
anatomy
masseter muscle
Journal
Folia morphologica
ISSN: 1644-3284
Titre abrégé: Folia Morphol (Warsz)
Pays: Poland
ID NLM: 0374620
Informations de publication
Date de publication:
2019
2019
Historique:
received:
10
07
2018
accepted:
23
09
2018
revised:
22
09
2018
pubmed:
30
10
2018
medline:
21
11
2019
entrez:
30
10
2018
Statut:
ppublish
Résumé
It is well known that rodents are defined by a unique masticatory apparatus. The present study describes the design and structure of the masseter muscle of the blind mole rat (Spalax leucodon). The blind mole rat, which emer- ged 5.3-3.4 million years ago during the Late Pliocene period, is a subterranean, hypoxia-tolerant and cancer-resistant rodent. Yet, despite these impressive cha- racteristics, no information exists on their masticatory musculature. Fifteen adult blind mole rats were used in this study. Dissections were performed to investigate the anatomical characteristics of the masseter muscle. The muscle was comprised of three different parts: the superficial mas- seter, the deep masseter and the zygomaticomandibularis muscle. The superficial masseter originated from the facial fossa at the ventral side of the infraorbital foramen. The deep masseter was separated into anterior and posterior parts. The anterior part of the zygomaticomandibularis muscle arose from the snout and passed through the infraorbital foramen to connect on the mandible. The construction of the deep masseter and zygomaticomandibularis muscles were of the Myomorpha type. Further studies are needed to reveal features such as muscle biomechanics, muscle types.
Sections du résumé
BACKGROUND
BACKGROUND
It is well known that rodents are defined by a unique masticatory apparatus. The present study describes the design and structure of the masseter muscle of the blind mole rat (Spalax leucodon). The blind mole rat, which emer- ged 5.3-3.4 million years ago during the Late Pliocene period, is a subterranean, hypoxia-tolerant and cancer-resistant rodent. Yet, despite these impressive cha- racteristics, no information exists on their masticatory musculature.
MATERIALS AND METHODS
METHODS
Fifteen adult blind mole rats were used in this study. Dissections were performed to investigate the anatomical characteristics of the masseter muscle.
RESULTS
RESULTS
The muscle was comprised of three different parts: the superficial mas- seter, the deep masseter and the zygomaticomandibularis muscle. The superficial masseter originated from the facial fossa at the ventral side of the infraorbital foramen. The deep masseter was separated into anterior and posterior parts. The anterior part of the zygomaticomandibularis muscle arose from the snout and passed through the infraorbital foramen to connect on the mandible.
CONCLUSIONS
CONCLUSIONS
The construction of the deep masseter and zygomaticomandibularis muscles were of the Myomorpha type. Further studies are needed to reveal features such as muscle biomechanics, muscle types.
Identifiants
pubmed: 30371935
pii: VM/OJS/J/59192
doi: 10.5603/FM.a2018.0097
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM