Podcast
Questions and Answers
Which nerve is responsible for supplying sensation to the small area over the angle of the mandible and the parotid gland?
Which nerve is responsible for supplying sensation to the small area over the angle of the mandible and the parotid gland?
Which of the following arteries is responsible for supplying the submental region?
Which of the following arteries is responsible for supplying the submental region?
Which vein drains into the external jugular vein?
Which vein drains into the external jugular vein?
Which branch of the trigeminal nerve is responsible for supplying sensation to the orbit?
Which branch of the trigeminal nerve is responsible for supplying sensation to the orbit?
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Which of the following nerves is responsible for motor supply to the muscles of the face?
Which of the following nerves is responsible for motor supply to the muscles of the face?
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What is the primary function of the orbital part of the Orbicularis Oculi muscle?
What is the primary function of the orbital part of the Orbicularis Oculi muscle?
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Which of the following muscles originates from the maxilla and mandible in the midline?
Which of the following muscles originates from the maxilla and mandible in the midline?
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What is the primary function of the Buccinator muscle?
What is the primary function of the Buccinator muscle?
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Which nerve supplies the Orbicularis Oculi, Orbicularis Oris, and Buccinator muscles?
Which nerve supplies the Orbicularis Oculi, Orbicularis Oris, and Buccinator muscles?
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Where does the palpebral part of the Orbicularis Oculi muscle insert?
Where does the palpebral part of the Orbicularis Oculi muscle insert?
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Study Notes
Muscles of the Face
- Orbicularis oculi muscle:
- Origin: medial palpebral ligament, nasal part of frontal bone, and frontal process of maxilla
- Insertion: lateral palpebral raphe, forms an uninterrupted ellipse around orbit
- Nerve supply: facial nerve
- Action: closes eyelids gently (palpebral part) and forcefully (orbital part)
- Orbicularis oris muscle:
- Origin: superficial part from nearby muscles, deep part from maxilla and mandible in midline
- Insertion: forms an ellipse around mouth
- Nerve supply: facial nerve
- Action: closes and protrudes lips
- Buccinator muscle:
- Origin: maxilla and mandible above and below 3 molars, pterygomandibular raphe
- Insertion: blends with orbicularis oris and into lips, upper and lower fibers pass to the opposite side, middle fibers cross at the angle of the mouth
- Nerve supply: facial nerve
- Action: presses cheek against teeth, compresses distended cheeks
Nerve Supply
- Sensory supply:
- Supplied by branches of the 3 divisions of the trigeminal nerve (V1, V2, V3)
- Except for the small area over the angle of the mandible and the parotid gland, which is supplied by the great auricular nerve (C2 and 3)
- Motor supply:
- Supplied by the facial nerve
- V1 (ophthalmic):
- Supratrochlear
- Supraorbital
- Lacrimal
- Infratrochlear
- External nasal
- V2 (maxillary):
- Infraorbital
- Zygomaticofacial
- Zygomaticotemporal
- V3 (mandibular):
- Auriculotemporal
- Buccal
- Mental
- Small area over the angle of the mandible by the great auricular nerve
Blood Supply
- Arterial supply:
- Facial artery
- Submental
- Inferior and superior labial
- Angular
- Superficial temporal artery
- Transverse facial
- Small arteries that accompany the sensory nerves of the face
- Facial artery
Venous Drainage
- Supratrochlear + supraorbital veins → anterior facial vein
- Superficial temporal vein + maxillary vein → retromandibular vein
- Posterior auricular vein + posterior division of the retromandibular vein → external jugular vein
- Occipital vein drains into the suboccipital venous plexus
Lymphatic Drainage
- Not mentioned in the text
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Description
This quiz covers the muscles, nerve supply, blood supply, and lymphatic drainage of the face, including the orbicularis occuli and orbicularis oris.
