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Questions and Answers
What is the primary function of the Zygomaticus major muscle?
What is the primary function of the Zygomaticus major muscle?
- Stabilizes the scapula
- Elevates the mandible
- Draws the angle of the mouth superiorly/laterally (correct)
- Rotates the head
Which muscle is responsible for compressing the lips against the teeth?
Which muscle is responsible for compressing the lips against the teeth?
- Zygomaticus major
- Temporalis
- Risorius
- Orbicularis oris (correct)
What action does the Temporalis muscle perform?
What action does the Temporalis muscle perform?
- Depresses the scapula
- Elevates and retracts the mandible (correct)
- Draws the angle of the mouth laterally
- Flexes the neck
Which muscle draws the angle of the mouth laterally?
Which muscle draws the angle of the mouth laterally?
Which muscle is involved in the stabilization of the scapula?
Which muscle is involved in the stabilization of the scapula?
What is the primary action of the Buccinator muscle?
What is the primary action of the Buccinator muscle?
Which muscle acts to elevate the mandible?
Which muscle acts to elevate the mandible?
Which muscle's insertion is primarily on the skin of the forehead and orbital margin?
Which muscle's insertion is primarily on the skin of the forehead and orbital margin?
Where does the Orbicularis oculi originate?
Where does the Orbicularis oculi originate?
What role does the Occipitofrontalis muscle play in facial movement?
What role does the Occipitofrontalis muscle play in facial movement?
Which muscle surrounds the mouth and is responsible for movements at the corners of the lips?
Which muscle surrounds the mouth and is responsible for movements at the corners of the lips?
What is the origin of the Buccinator muscle?
What is the origin of the Buccinator muscle?
Which action is NOT performed by the Orbicularis oculi muscle?
Which action is NOT performed by the Orbicularis oculi muscle?
Flashcards
Zygomaticus Major Function
Zygomaticus Major Function
Draws the angle of the mouth superiorly/laterally, enabling smiling.
Orbicularis Oris Function
Orbicularis Oris Function
Compresses the lips against the teeth and shapes the lips during speech and eating.
Temporalis Muscle Action
Temporalis Muscle Action
Elevates and retracts the mandible, playing a key role in chewing.
Risorius Muscle Action
Risorius Muscle Action
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Trapezius Function
Trapezius Function
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Buccinator Muscle Action
Buccinator Muscle Action
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Masseter Muscle Action
Masseter Muscle Action
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Occipitofrontalis Role
Occipitofrontalis Role
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Orbicularis Oculi Action
Orbicularis Oculi Action
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Orbicularis Oris Function
Orbicularis Oris Function
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Study Notes
Muscles of the Face
- Buccinator:
- Origin: Maxilla and mandible
- Insertion: Orbicularis oris, pterygomandibular raphe
- Action: Presses cheeks, assists in mastication
- Occipitofrontalis:
- Origin: Epicranial aponeurosis, supra-occipital bone
- Insertion: Skin of forehead, supraorbital margin, mastoid process
- Action: Raise eyebrows, wrinkle forehead, draw scalp anteriorly or posteriorly
- Masseter:
- Origin: Maxilla and zygomatic bone
- Insertion: Angle and ramus of mandible
- Action: Elevates mandible (closes mouth)
- Orbicularis Oculi:
- Origin: Medial wall of orbit (frontal/maxillary bones)
- Insertion: Circular path around orbit (eyelids and ligaments)
- Action: Closes eye (eyelid)
- Orbicularis Oris:
- Origin: Muscle fibers surrounding the corners of the mouth (maxilla and mandible)
- Insertion: Skin at the corner of the mouth
- Action: Closes mouth, compresses lips against teeth, shapes lips
- Risorius:
- Origin: Fascia over parotid gland
- Insertion: Skin at an angle of the mouth
- Action: Draws the angle of the mouth laterally
- Sternocleidomastoid:
- Origin: Sternum and clavicle
- Insertion: Temporal bone (mastoid process)
- Action: Flex and laterally rotate head
- Temporalis
- Origin: Temporal bone
- Insertion: Mandible
- Action: Elevates and retracts mandible
- Trapezius:
- Origin: Occipital bone, clavicle, acromion, spine of scapula
- Insertion:
- Action: Rotate, adduct, depress, and stabilize scapula
- Zygomaticus Major:
- Origin: Zygomatic bone
- Insertion: Orbicularis Oris (mouth)
- Action: Draws the angle of the mouth superiorly/laterally
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