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Ahead of Print
ORIGINAL ARTICLES
Published online: 2018-10-16
Submitted: 2018-07-10
Accepted: 2018-09-23
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Blind Mole Rat (Spalax leucodon ) masseter muscle: structure, homology, diversification and nomenclature

Atila Yoldas, Mehmet Demir, Ramazan İlgun, Orhun Mustafa Dayan
DOI: 10.5603/FM.a2018.0097
·
Pubmed: 30371935

open access

Ahead of Print
ORIGINAL ARTICLES
Published online: 2018-10-16
Submitted: 2018-07-10
Accepted: 2018-09-23

Abstract

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 emerged about 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 characteristics, no information exists on their masticatory musculature. Materials and methods: Fifteen adult blind mole rat were used in this study. Dissections were performed to investigate the anatomical characteristics of the masseter muscle. Results: The muscle was comprised of three different parts: the superficial masseter, 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: 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.

Abstract

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 emerged about 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 characteristics, no information exists on their masticatory musculature. Materials and methods: Fifteen adult blind mole rat were used in this study. Dissections were performed to investigate the anatomical characteristics of the masseter muscle. Results: The muscle was comprised of three different parts: the superficial masseter, 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: 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.

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Keywords

anatomy, masseter muscle, Spalax leucodon

About this article
Title

Blind Mole Rat (Spalax leucodon ) masseter muscle: structure, homology, diversification and nomenclature

Journal

Folia Morphologica

Issue

Ahead of Print

Published online

2018-10-16

DOI

10.5603/FM.a2018.0097

Pubmed

30371935

Keywords

anatomy
masseter muscle
Spalax leucodon

Authors

Atila Yoldas
Mehmet Demir
Ramazan İlgun
Orhun Mustafa Dayan

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