Intermediate Hypoglossal Nerve Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. What surface landmark overlies the hypoglossal nucleus in the floor of the fourth ventricle?
- Hypoglossal trigone
- Area postrema
- Vagal trigone
- Facial colliculus
Q2. Which structures border the preolivary sulcus from which CN XII emerges?
- Gracile tubercle medially and cuneate tubercle laterally
- Inferior cerebellar peduncle medially and olive laterally
- Olive medially and pyramid laterally
- Pyramid medially and olive laterally
Q3. After leaving the hypoglossal canal, CN XII descends in the neck near which major vascular structures?
- Subclavian artery and axillary vein
- Internal carotid artery and internal jugular vein
- Middle meningeal artery and cavernous sinus
- Vertebral artery and external jugular vein only
Q4. Which artery does CN XII commonly cross as it curves forward toward the tongue?
- Middle meningeal artery
- External carotid artery
- Central retinal artery
- Anterior cerebral artery
Q5. Which muscle does CN XII pass superficial to as it approaches the tongue?
- Superior constrictor only
- Buccinator
- Genioglossus only
- Hyoglossus
Q6. Which intrinsic tongue muscles are supplied by CN XII?
- Mylohyoid and geniohyoid only
- Masseter and temporalis
- Superior longitudinal, inferior longitudinal, transverse, and vertical muscles
- Palatoglossus and stylopharyngeus only
Q7. Which extrinsic tongue muscles are directly supplied by CN XII?
- Mylohyoid, geniohyoid, and anterior digastric
- Masseter, temporalis, and medial pterygoid
- Genioglossus, hyoglossus, and styloglossus
- Palatoglossus, stylopharyngeus, and salpingopharyngeus
Q8. Which spinal nerve fibers briefly travel with CN XII without being true hypoglossal fibers?
- S2 fibers
- C5 fibers
- T1 fibers
- C1 fibers
Q9. Which muscles receive C1 motor fibers that travel with the hypoglossal nerve?
- Genioglossus and styloglossus
- Sternocleidomastoid and trapezius
- Mylohyoid and anterior digastric
- Geniohyoid and thyrohyoid
Q10. How does the superior root of the ansa cervicalis relate to CN XII?
- It contains C1 fibers that temporarily travel with CN XII
- It is composed of true hypoglossal motor axons
- It is a parasympathetic branch of CN XII
- It carries taste fibers from the tongue