Podcast
Questions and Answers
What is the primary function of the zygomaticus major muscle?
What is the primary function of the zygomaticus major muscle?
Which cranial bone forms the forehead and roof of the orbit?
Which cranial bone forms the forehead and roof of the orbit?
What is the function of the buccinator muscle?
What is the function of the buccinator muscle?
Which suture connects the frontal and parietal bones?
Which suture connects the frontal and parietal bones?
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Which muscle is responsible for elevating the mandible (closing the jaw)?
Which muscle is responsible for elevating the mandible (closing the jaw)?
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Which cranial bone forms the posterior part of the orbit and nasal cavity?
Which cranial bone forms the posterior part of the orbit and nasal cavity?
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What is the primary function of the superficial fascia?
What is the primary function of the superficial fascia?
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What type of tissue is the superficial fascia composed of?
What type of tissue is the superficial fascia composed of?
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What is the relationship between the superficial fascia and the skin?
What is the relationship between the superficial fascia and the skin?
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What is the importance of the superficial fascia?
What is the importance of the superficial fascia?
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What is the location of the superficial fascia?
What is the location of the superficial fascia?
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Study Notes
Facial Muscles
- Overview: 23 muscles responsible for facial expressions, mastication, and eye movements
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Muscles of Facial Expression:
- Zygomaticus major: elevates angle of mouth (smiling)
- Zygomaticus minor: elevates upper lip
- Orbicularis oculi: closes eyelids
- Procerus: wrinkles nose
- Nasalis: compresses nostrils
- Buccinator: compresses cheeks
- Risorius: pulls lips laterally
-
Muscles of Mastication:
- Masseter: elevates mandible (closes jaw)
- Temporalis: elevates mandible (closes jaw)
- Medial pterygoid: elevates mandible (closes jaw)
- Lateral pterygoid: depresses mandible (opens jaw)
Cranial Bones
- Overview: 8 bones that form the cranium, protecting the brain
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Bones:
- Frontal bone: forms forehead, roof of orbit, and nasal cavity
- Parietal bones: forms sides and roof of cranium
- Occipital bone: forms back and base of cranium
- Temporal bones: forms sides and base of cranium
- Sphenoid bone: forms posterior part of orbit and nasal cavity
- Ethmoid bone: forms nasal cavity and orbit
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Sutures: fibrous joints that connect cranial bones
- Coronal suture: between frontal and parietal bones
- Sagittal suture: between parietal bones
- Lambdoid suture: between occipital and parietal bones
Facial Muscles
- There are 23 facial muscles responsible for facial expressions, mastication, and eye movements
Muscles of Facial Expression
- Zygomaticus major elevates the angle of the mouth, forming a smile
- Zygomaticus minor elevates the upper lip
- Orbicularis oculi closes the eyelids
- Procerus wrinkles the nose
- Nasalis compresses the nostrils
- Buccinator compresses the cheeks
- Risorius pulls the lips laterally
Muscles of Mastication
- Masseter elevates the mandible, closing the jaw
- Temporalis elevates the mandible, closing the jaw
- Medial pterygoid elevates the mandible, closing the jaw
- Lateral pterygoid depresses the mandible, opening the jaw
Cranial Bones
- The cranium is formed by 8 bones that protect the brain
Bones
- Frontal bone forms the forehead, roof of the orbit, and nasal cavity
- Parietal bones form the sides and roof of the cranium
- Occipital bone forms the back and base of the cranium
- Temporal bones form the sides and base of the cranium
- Sphenoid bone forms the posterior part of the orbit and nasal cavity
- Ethmoid bone forms the nasal cavity and orbit
Sutures
- Sutures are fibrous joints that connect cranial bones
- Coronal suture is located between the frontal and parietal bones
- Sagittal suture is located between the parietal bones
- Lambdoid suture is located between the occipital and parietal bones
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Description
Learn about the 23 muscles responsible for facial expressions, mastication, and eye movements, including their names and functions.
