The levator rostri muscle of the philippine native pig (Sus scrofa domesticus linnaeus, 1975) (Artiodactyla: Suidae)

Abstract

© 2019, University of the Philippines at Los Banos. All rights reserved. The gross anatomy of the levator rostri muscle was studied in seven (three females and four males) Philippine native pigs used by veterinary anatomy students in Veterinary Anatomy 102 (Macroscopic Anatomy) class. The belly of the levator rostri arose from the canine preorbital fossa of the lacrimal bone. Its long and flat tendon of insertion attached on the dorsolateral part of the os rostrale. The muscle belly was divided by a faint superficial groove into a larger dorsal and a smaller ventral part. The dorsal belly in the Philippine native pigs measured from 2.6 cm to 4.4 cm long and 0.9 to 1.1 cm wide. The ventral belly measured 2.9 cm to 3.7 cm long and 0.8 to 1.2 cm wide. Its long tendon of insertion was 4.9 to 6.8 cm long and 0.3 to 0.4 cm wide. Rostral to the junction between the belly and the tendon was a muscular slip which terminated along the ventral border of the incisive bone rostral to the canine alveolus. The muscular slip measured from 2.2 to 2.8 cm long and 0.4 to 0.6 cm wide. This muscular slip supports the tendon and prevents over-contraction of the levator rostri during digging. This is the first descriptive study on the levator rostri muscle of Philippine native pigs.

Source or Periodical Title

Philippine Journal of Veterinary Medicine

ISSN

317705

Page

122-126

Document Type

Article

Subject

Facial muscle, Levator labii superioris, Levator rostri, Philippines, Pig

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