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Questions and Answers
A patient reports loss of sensation in the skin of their forehead and upper eyelid. If this is due to damage to a single nerve, which of the following is least likely to be the affected nerve?
A patient reports loss of sensation in the skin of their forehead and upper eyelid. If this is due to damage to a single nerve, which of the following is least likely to be the affected nerve?
- Infratrochlear nerve
- Supraorbital nerve
- Supratrochlear nerve
- Lacrimal nerve (correct)
A surgeon is planning an approach that requires minimal disruption to cutaneous sensation of the cheek. Which nerve should the surgeon carefully avoid?
A surgeon is planning an approach that requires minimal disruption to cutaneous sensation of the cheek. Which nerve should the surgeon carefully avoid?
- External Nasal nerve
- Supratrochlear nerve
- Zygomaticotemporal nerve
- Infraorbital nerve (correct)
Following a traumatic injury to the face, a patient exhibits anesthesia of the skin over the zygomatic bone. Which nerve is most likely damaged?
Following a traumatic injury to the face, a patient exhibits anesthesia of the skin over the zygomatic bone. Which nerve is most likely damaged?
- Zygomaticofacial nerve (correct)
- Zygomaticotemporal nerve
- Auriculotemporal nerve
- Infraorbital nerve
A patient presents with numbness of the skin on the anterior temple above the zygomatic arch. Which nerve is most likely affected?
A patient presents with numbness of the skin on the anterior temple above the zygomatic arch. Which nerve is most likely affected?
A patient has lost sensation on the skin of the nose. Which nerve damage would most likely cause this symptom?
A patient has lost sensation on the skin of the nose. Which nerve damage would most likely cause this symptom?
A patient reports a loss of sensation in the upper lip and side of the nose, but has normal sensation in the cheek. Which nerve is most likely affected?
A patient reports a loss of sensation in the upper lip and side of the nose, but has normal sensation in the cheek. Which nerve is most likely affected?
Which nerve directly exits via the supraorbital foramen (or notch)?
Which nerve directly exits via the supraorbital foramen (or notch)?
Which of the following nerves does not originate directly from the ophthalmic division (V1) of the trigeminal nerve?
Which of the following nerves does not originate directly from the ophthalmic division (V1) of the trigeminal nerve?
Where does the zygomaticofacial nerve exit the skull?
Where does the zygomaticofacial nerve exit the skull?
Through which opening does the infraorbital nerve pass?
Through which opening does the infraorbital nerve pass?
Flashcards
Supraorbital Nerve
Supraorbital Nerve
A branch of V1 that exits via the supraorbital foramen/notch.
Supratrochlear Nerve
Supratrochlear Nerve
A V1 branch that exits medially near the eye.
Infratrochlear Nerve
Infratrochlear Nerve
A V1 branch supplying the medial upper eyelid and nose skin.
Lacrimal Nerve
Lacrimal Nerve
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External Nasal Nerve
External Nasal Nerve
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Infraorbital Nerve
Infraorbital Nerve
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Zygomaticofacial Nerve
Zygomaticofacial Nerve
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Zygomaticotemporal Nerve
Zygomaticotemporal Nerve
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Forehead and Upper Eyelid
Forehead and Upper Eyelid
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Medial Upper Eyelid and Nose
Medial Upper Eyelid and Nose
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Study Notes
- Functional anatomy of CN V innervation to face/parotid region
Ophthalmic Division (V1)
- Supraorbital nerve branch originates from the frontal nerve.
- Supraorbital nerve exits via the supraorbital foramen (or notch) of the frontal bone.
- Supraorbital sensory area includes the forehead, scalp, and upper eyelid.
- Supratrochlear nerve branch originates from the frontal nerve.
- Supratrochlear nerve exits via the medial supraorbital margin of the frontal bone.
- Supratrochlear sensory area includes the forehead, scalp, and upper eyelid.
- Infratrochlear nerve branch originates from the nasociliary nerve
- Infratrochlear nerve exits via the medial infraorbital margin of the frontal bone.
- Infratrochlear sensory area includes the medial upper eyelid, skin of the nose, and lacrimal sac.
- Lacrimal nerve branch originates from the ophthalmic nerve.
- Lacrimal nerve exits via the lateral orbital margin of the frontal bone.
- Lacrimal nerve sensory area includes the lateral eyelid.
- External nasal nerve branch originates from the anterior ethmoid nerve.
- External nasal nerve exits between the nasal bone and cartilaginous part of the nose.
- External nasal sensory area includes the skin of the nose.
Maxillary Division (V2)
- Infraorbital nerve branch originates from the maxillary nerve.
- Infraorbital nerve exits via the infraorbital foramen of the maxilla.
- Infraorbital sensory area includes the lower eyelid, cheek, side of nose, skin and mucous membrane of upper lip.
- Zygomaticofacial nerve branch originates from the zygomatic nerve
- Zygomaticofacial nerve exits via the zygomaticofacial foramen on the lateral surface of the zygomatic bone.
- Zygomaticofacial sensory area includes the skin of the face over the zygomatic bone.
- Zygomaticotemporal nerve branch originates from the zygomatic nerve.
- Zygomaticotemporal nerve exits via the zygomaticotemporal foramen on the posterior surface of the zygomatic bone.
- Zygomaticotemporal sensory area includes the skin of the anterior temple above the zygomatic arch.
Mandibular Division (V3)
- Mental nerve branch originates from the inferior alveolar nerve.
- Mental nerve exits via the mental foramen of the mandible.
- Mental sensory area includes the skin and mucous membrane of the lower lip and chin.
- Buccal nerve branch originates from the mandibular nerve.
- Buccal nerve exits via the IT Fossa.
- Buccal sensory area includes the skin and mucous membrane of the cheek.
- Auriculotemporal nerve branch originates from the mandibular nerve.
- Auriculotemporal nerve exits via the IT Fossa.
- Auriculotemporal sensory area includes the external ear and temporal area of the scalp.
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Description
Overview of the ophthalmic division (V1) of the trigeminal nerve, including its branches (supraorbital, supratrochlear, infratrochlear, and lacrimal nerves) and their sensory areas on the face. Focus on the origin and exit points of each nerve.
