Head & Neck · NEET PG Preparation Anatomy
A patient presents with a cavernous sinus thrombosis secondary to a severe facial infection. Which of the following cranial nerves is typically the v…
Practice question from Head & Neck (NEET PG Preparation Anatomy), with the correct answer and a step-by-step solution.
hard · MCQ · Q-B997EF
A patient presents with a cavernous sinus thrombosis secondary to a severe facial infection. Which of the following cranial nerves is typically the very first to manifest signs of dysfunction within the cavernous sinus?
- A.Oculomotor nerve (CN III)
- B.Trochlear nerve (CN IV)
- C.Abducent nerve (CN VI)Correct answer
- D.Ophthalmic nerve (CN V1)
Solution
Within the cavernous sinus, the abducent nerve (CN VI) runs freely through the center of the sinus, lateral to the internal carotid artery. Because of this unique central location, it is typically the first cranial nerve affected in cavernous sinus thrombosis, leading to lateral rectus palsy.
More from Head & Neck
- A 45-year-old man presents with a swelling in the submandibular region that enlarges during meals, accompanied by postprandial pain. Which…
- During a thyroidectomy, a surgeon accidentally ligates the nerve running intimately with the superior thyroid artery on the surface of the…
- A deep stab wound to the posterior triangle of the neck results in the inability to shrug the shoulder and an inability to abduct the arm a…
- Which of the following structures exits the cranial cavity via the foramen spinosum?
Practise more Anatomy
Sign up free for adaptive practice on this chapter, with instant feedback and hints on every question.
Start practising freeFree to start · No credit card needed