Intermediate Accessory Nerve Quiz
Ready to start the quiz?
This quiz contains 10 questions. Click below to begin.
Q1. How do spinal accessory nerve fibers reach the skull before exiting through the jugular foramen?
- They ascend through the foramen magnum before exiting through the jugular foramen
- They travel through the internal acoustic meatus
- They enter through the carotid canal and leave through foramen ovale
- They pass directly through the hypoglossal canal from the spinal cord
Q2. Which cranial nerves accompany CN XI through the jugular foramen?
- Oculomotor and trochlear nerves
- Optic and abducens nerves
- Glossopharyngeal and vagus nerves
- Trigeminal and facial nerves
Q3. After leaving the jugular foramen, which muscle does the accessory nerve usually encounter first?
- Sternocleidomastoid
- Masseter
- Buccinator
- Mylohyoid
Q4. After supplying sternocleidomastoid, where does CN XI become especially superficial and vulnerable?
- Submandibular triangle only
- Carotid canal
- Posterior triangle of the neck
- Pterygopalatine fossa
Q5. Which muscle does CN XI enter after crossing the posterior triangle?
- Trapezius
- Anterior scalene
- Platysma
- Geniohyoid
Q6. What is the relationship between CN XI and the cervical plexus in the innervation of sternocleidomastoid and trapezius?
- CN XI provides principal motor fibers while cervical nerves contribute proprioceptive fibers
- There is no anatomical relationship between them
- The cervical plexus provides all motor fibers and CN XI is purely sensory
- CN XI and the cervical plexus innervate only the skin over these muscles
Q7. Which cervical spinal nerve levels commonly contribute proprioceptive fibers to sternocleidomastoid?
- C2 and C3
- T1 and T2
- C7 and C8
- C5 and C6 only
Q8. Which cervical spinal nerve levels commonly contribute fibers associated with trapezius?
- C1 only
- T2 and T3
- C3 and C4
- C6 and C7
Q9. What scapular abnormality may follow significant trapezius weakness from CN XI injury?
- Mandibular protrusion
- Shoulder droop with abnormal scapular position
- Fixed medial deviation of the eye
- Loss of tongue sensation
Q10. Why is CN XI at risk during procedures in the posterior triangle of the neck?
- It has a superficial course across the posterior triangle
- It lies within the vertebral canal throughout the neck
- It runs inside the internal carotid artery
- It is enclosed within the parotid duct