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Muscles of Facial Expression Ori Occipitofrontalis (Epicranius) Orbicularis Oculi Orbicularis Oris Zygomaticus (no need to distinguish major/minor) Platysma

Muscles of Facial Expression Ori Occipitofrontalis (Epicranius) Orbicularis Oculi Orbicularis Oris Zygomaticus (no need to distinguish major/minor) Platysma

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Muscles of Facial Expression | Muscle | Origin | Insertion | Action | |----------------------------------------|--------|-----------|--------| | Occipitofrontalis (Epicranius) | | | | | Orbicularis Oculi | | | | | Orbicularis Oris | | | | | Zygomaticus (no need to distinguish major/minor) | | | | | Platysma | | | | | Risorius | | | | | Buccinator | | | | | Depressor Anguli Oris | | | | **Diagram Explanation:** **Left Diagram:** This is an anatomical illustration of the superficial muscles of the head and neck, viewed from the left side. Key labeled muscles include: - *Occipitofrontalis (Epicranius)*: Forehead area, raises eyebrows. - *Orbicularis Oculi*: Surrounds the eyes, involved in blinking. - *Orbicularis Oris*: Encircles the mouth, involved in puckering lips. - *Zygomaticus*: Attached around the cheek, raises corners of the mouth (smiling). - *Buccinator*: Located in the cheek area. - *Platysma*: Superficial neck muscle involved in expressions like frowning. **Right Diagrams:** These photos demonstrate actions of select facial muscles with individual expressions: 1. **Frontal belly of Occipitofrontalis**: Raising eyebrows. 2. **Corrugator Supercilii**: Frowning, drawing eyebrows together. 3. **Orbicularis Oculi**: Blinking or closing the eyes tightly. 4. **Zygomaticus Major**: Smiling by elevating the mouth corners. 5. **Orbicularis Oris**: Puckering or closing lips tightly. 6. **Mentalis**: Pouting by moving chin forward. 7. **Platysma**: Tensing neck skin or lowering jaw. These images and diagrams provide a visual guide to understanding the roles of different facial muscles in expressions.
Transcribed Image Text:Muscles of Facial Expression | Muscle | Origin | Insertion | Action | |----------------------------------------|--------|-----------|--------| | Occipitofrontalis (Epicranius) | | | | | Orbicularis Oculi | | | | | Orbicularis Oris | | | | | Zygomaticus (no need to distinguish major/minor) | | | | | Platysma | | | | | Risorius | | | | | Buccinator | | | | | Depressor Anguli Oris | | | | **Diagram Explanation:** **Left Diagram:** This is an anatomical illustration of the superficial muscles of the head and neck, viewed from the left side. Key labeled muscles include: - *Occipitofrontalis (Epicranius)*: Forehead area, raises eyebrows. - *Orbicularis Oculi*: Surrounds the eyes, involved in blinking. - *Orbicularis Oris*: Encircles the mouth, involved in puckering lips. - *Zygomaticus*: Attached around the cheek, raises corners of the mouth (smiling). - *Buccinator*: Located in the cheek area. - *Platysma*: Superficial neck muscle involved in expressions like frowning. **Right Diagrams:** These photos demonstrate actions of select facial muscles with individual expressions: 1. **Frontal belly of Occipitofrontalis**: Raising eyebrows. 2. **Corrugator Supercilii**: Frowning, drawing eyebrows together. 3. **Orbicularis Oculi**: Blinking or closing the eyes tightly. 4. **Zygomaticus Major**: Smiling by elevating the mouth corners. 5. **Orbicularis Oris**: Puckering or closing lips tightly. 6. **Mentalis**: Pouting by moving chin forward. 7. **Platysma**: Tensing neck skin or lowering jaw. These images and diagrams provide a visual guide to understanding the roles of different facial muscles in expressions.
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