Question | Answer |
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 |