Intermediate Vestibulocochlear Nerve Quiz

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

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

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

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

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

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

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

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

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

• Macula
• Tympanic plexus
• Crista ampullaris
• Spiral organ

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

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

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

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

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

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

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

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

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
• The optic nerve carries backup auditory information
• Each cochlear nerve crosses completely before entering the brainstem
• The vestibular nerve replaces cochlear input