Intermediate Vestibulocochlear Nerve Quiz

Q1. Where do central processes of spiral ganglion neurons first terminate in the brainstem?

• Solitary nucleus
• Nucleus ambiguus
• Vestibular nuclei
• Dorsal and ventral cochlear nuclei

Q2. Which brainstem nuclear complex receives most primary vestibular afferents?

• Cochlear nuclei
• Hypoglossal nucleus
• Vestibular nuclei
• Facial motor nucleus

Q3. Which otolith organ is especially sensitive to horizontal linear acceleration and head tilt?

• Posterior semicircular duct only
• Utricle
• Cochlear duct
• Saccule

Q4. Which otolith organ is especially sensitive to vertical linear acceleration?

• Lateral semicircular duct
• Saccule
• Organ of Corti
• Utricle

Q5. What sensory structure is located in the ampulla of each semicircular duct?

• Tympanic plexus
• Macula
• Spiral organ
• Crista ampullaris

Q6. What sensory structure is found in the utricle and saccule?

• Spiral limbus
• Crista ampullaris
• Macula
• Organ of Corti

Q7. Which pathway connects vestibular nuclei with ocular motor nuclei to coordinate compensatory eye movements?

• Medial longitudinal fasciculus
• Corticospinal tract
• Medial lemniscus
• Lateral lemniscus

Q8. Which ascending auditory tract carries major projections from the cochlear nuclear and superior olivary regions toward the inferior colliculus?

• Fasciculus gracilis
• Spinothalamic tract
• Medial longitudinal fasciculus
• Lateral lemniscus

Q9. Which thalamic nucleus relays auditory information toward the auditory cortex?

• Ventral posterolateral nucleus
• Lateral geniculate body
• Medial geniculate body
• Anterior nucleus

Q10. Why does a unilateral central lesion above the cochlear nuclei usually not cause complete deafness in one ear?

• Auditory pathways have extensive bilateral projections above the cochlear nuclei
• Each cochlear nerve crosses completely before entering the brainstem
• The optic nerve carries backup auditory information
• The vestibular nerve replaces cochlear input