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Anatomy Lab

Head Muscles (Origin and Insertion)

QuestionAnswer
This sphincter muscle encircles the mouth. Orbicularis Oris
The origin of the Orbicularis Oris. Several facial muscles, maxilla, mandible, and nasal septum.
The insertion and action of the Orbicularis Oris muscle. - Insertion: lips - Action: closes and puckers the lips
This sphincter muscle encircles the eyes. Orbicularis Oculi
The origin of the Orbicularis Oculi. Frontal and maxilla bones
The insertion and action of the Orbicularis Oris. - Insertion: the eyelids - Action: closes the eyelids
The muscle that is compose of two muscular parts that lie over the frontal and occipital bones. Epicranius
The Epicranius (composed of two muscular parts) are joined by the _______ _______, which covers the top of the skull. Epicranial aponeurosis
The origin of the Frontalis muscle. On the aponeurosis
The insertion of the Frontalis muscle. On the soft tissue under the eyebrows
The origin of the Occiptalis. On the mastoid process and occipital bone
The insertion of the Occiptalis. On the aponeurosis
The action of the Frontalis. Elevates the eyebrows and wrinkles the forehead
The action of the Occiptalis. Pulls the scalp backward
The origin of the two (2) Zygomaticus muscles (one on each side). Zygomatic arch and extends diagonally to their origin
The insertion of the two (2) Zygomaticus muscles. Orbicularis Oris at the corner of the mouth.
Action of the two (2) Zygomaticus muscles. Draws the corner of the mouth upward and backward as in smiling and laughing.
The origin of the Triangularis muscles. Mandible
The insertion of the Triangularis muscles. Orbicularis Oris at the corner of the mouth.
The Triangularis muscle is antagonist to what muscle? Zygomaticus
Created by: bkachaylo
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