Neuroanatomy Quiz
Questions: 16 · 10 minutes
1. A small lesion in the genu of the internal capsule would most directly disrupt which fibers?
Corticobulbar fibers
Optic radiations
Auditory radiations
Dorsal column fibers
2. A pituitary mass expanding upward can compress which structure immediately superior to the gland?
Pineal gland
Cerebral aqueduct
Optic chiasm
Fourth ventricle
3. Which cranial nerve emerges from the lateral pons and carries the principal sensory innervation of the face as well as motor fibers for mastication?
Facial nerve
Abducens nerve
Trigeminal nerve
Vestibulocochlear nerve
4. A lesion confined to the right primary visual cortex is most likely to produce which deficit?
Loss of the temporal visual fields in both eyes
Blindness in the right eye only
Loss of the left visual field in both eyes
Loss of the right visual field in both eyes
5. Arachnoid granulations primarily return cerebrospinal fluid to which compartment?
Epidural space
Dural venous sinuses
Ventricular choroid plexus
Brain parenchyma
6. Which cerebral lobe is most strongly associated with executive functions such as planning, inhibition, and working memory?
Frontal lobe
Parietal lobe
Occipital lobe
Temporal lobe
7. Bilateral damage to the hippocampi would most directly impair which ability?
Executing previously learned motor routines
Understanding the meaning of familiar words
Forming new declarative memories
Detecting sound frequency
8. Damage limited to the right dorsal column of the spinal cord at T10 would most likely cause which finding below the lesion?
Reduced pain and temperature sensation on the right side
Reduced vibration and conscious proprioception on the right side
Reduced vibration and conscious proprioception on the left side
Bilateral loss of voluntary movement
9. Cerebrospinal fluid normally passes directly from each lateral ventricle into the third ventricle through which structure?
Cerebral aqueduct
Median aperture
Central canal
Interventricular foramen
10. An enlarging posterior communicating artery aneurysm commonly compresses which cranial nerve, potentially causing ptosis and a dilated pupil?
Oculomotor nerve
Optic nerve
Trochlear nerve
Abducens nerve
11. What is the principal anatomical role of the corpus callosum?
Connecting the cerebellum directly to the spinal cord
Connecting corresponding regions of the two cerebral hemispheres
Relaying sensory signals from the thalamus to the brainstem
Carrying output from the hippocampus to the mammillary bodies
12. Neurons in the substantia nigra pars compacta primarily provide which projection?
Serotonergic input to the cerebral cortex
Cholinergic input to skeletal muscle
Noradrenergic input to the cerebellum
Dopaminergic input to the striatum
13. A patient has inaccurate, poorly coordinated movements of the left arm, but normal strength. A focal lesion is most likely located in which area?
Right primary motor cortex
Left primary visual cortex
Right cerebellar hemisphere
Left cerebellar hemisphere
14. Which thalamic nucleus primarily relays somatic sensory information from the body to the primary somatosensory cortex?
Lateral geniculate nucleus
Ventral posterolateral nucleus
Ventral anterior nucleus
Medial geniculate nucleus
15. A person understands spoken language and knows what they want to say, but their speech is slow and effortful after a focal left-hemisphere injury. Which region is most likely affected?
Left posterior superior temporal cortex
Right inferior parietal lobule
Right primary visual cortex
Left inferior frontal gyrus
16. Cell bodies of sympathetic preganglionic neurons are primarily found in which part of the spinal cord?
Lateral horn from approximately T1 to L2
Ventral horn from C1 to C8
Dorsal horn at all spinal levels
Sacral parasympathetic nuclei from S2 to S4