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Questions and Answers
Which of the following nerves is responsible for the sensation of the upper eyelid, forehead, and scalp?
Which of the following nerves is responsible for the sensation of the upper eyelid, forehead, and scalp?
- Lacimal nerve
- Supratrochlear nerve (correct)
- Infratrochlear nerve
- Mandibular nerve
Which pharyngeal arch is responsible for the innervation of the muscles of mastication?
Which pharyngeal arch is responsible for the innervation of the muscles of mastication?
- Second pharyngeal arch
- Fourth pharyngeal arch
- First pharyngeal arch (correct)
- Third pharyngeal arch
Which of the following nerves is responsible for the motor innervation of the facial muscles?
Which of the following nerves is responsible for the motor innervation of the facial muscles?
- Vestibulocochlear nerve
- Trigeminal nerve
- Olfactory nerve
- Facial nerve (correct)
Which of the following branches of the trigeminal nerve is responsible for the sensation of the lower eyelid, side of the nose, and upper lip?
Which of the following branches of the trigeminal nerve is responsible for the sensation of the lower eyelid, side of the nose, and upper lip?
Which of the following muscles is innervated by the marginal mandibular branch of the facial nerve?
Which of the following muscles is innervated by the marginal mandibular branch of the facial nerve?
From which aspect of the parotid gland does the facial nerve emerge?
From which aspect of the parotid gland does the facial nerve emerge?
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Study Notes
Innervation of the Face
- The face receives innervation from the first and second pharyngeal arches.
Trigeminal Nerve (First Pharyngeal Arch)
- Provides sensation and motor function for mastication
- Comprises three divisions:
- Ophthalmic nerve
- Supratrochlear and supraorbital nerves (upper eyelid, forehead, and scalp)
- Infraorbital nerve (medial half of eyelid, side of nose)
- Lacrimal nerve (lateral half of upper eyelid)
- External nasal nerve (anterior part of nose)
- Maxillary nerve (foramen rotundum)
- Zygomaticotemporal nerve (zygomatic arch)
- Zygomaticofacial nerve (skin over zygomatic bone)
- Infraorbital nerve (lower eyelid, side of nose, upper lip)
- Mandibular nerve (foramen ovale)
- Auriculotemporal nerve (hair-bearing area of temple)
- Buccal nerve (skin of cheek)
- Mental nerve (lower lip, skin of chin)
- Ophthalmic nerve
Facial Nerve (Second Pharyngeal Arch)
- Provides motor function for facial expressions
- Comprises five branches:
- Temporal branch
- Zygomatic branch
- Buccal branch
- Marginal mandibular branch
- Cervical branch (platysma muscle)
- Emerges from the anterior aspect of the parotid gland
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