Levator Nasolabialis Horse

Dilator Nares

The muscles of the head consist of the chewing muscles temporalis, masseter, and digastric and the facial muscles zygomaticus, orbicularis oris, etc. . The chewing muscles are thick and volumetric, and they originate and insert on bone. They open and close the lower jaw, with the action taking place at the jaw joint temporomandibular joint . The facial muscles are thin. They originate either from the skull or from the surface of other muscles, and they generally insert into other facial muscles...

Pectoralis profundus Pectoralis minor Dog And Feline

Extensor Digitorum Communis Muscle

Origin Most of the sternum except its front tip and from the surface of the front end of the abdomen in the region of the xiphoid process . Insertion Upper inner surface of the humerus, and onto a vertical line on the upper third to upper half of the front of the humerus. Structure The pectoralis profundus is seen on the side of the lower portion of the chest, its upper edge directed toward the shoulder joint. In the feline, the portion at the outer edge of the muscle forms a separate division...