Q&A Wilsons Review

Q1. What does the Optic Nerve do?

A. Sends visual info to the LGN of the thalamus.

Q2. What structures make up the tectum?

A. Superior and inferior colliculi.

Q3. What are the parts of the diencephalon?

A. Thalamus and hypothalamus.

Q4. What are the parts of the mesencephalon (midbrain)?

A. Tectum and tegmentum.

Q5. What are the parts of the metencephalon?

A. Pons and cerebellum.

🩸 Circle of Willis / Blood Supply

Q6. What does the ACA supply?

A. Frontal, superior parietal, and subcortical areas.

Q7. What does the MCA supply?

A. Lateral brain, including speech areas.

Q8. What does the PCA supply?

A. Occipital, inferior temporal, and posterior parietal regions.

Q9. Where is the motor planning cortex and its blood supply?

A. Below SMA, supplied by MCA.

Q10. Where is the supplementary motor area and its blood supply?

A. Above premotor cortex, supplied by ACA.

💬 Communication Systems

Q11. What systems affect pragmatic communication?

A. Limbic system, basal ganglia, thalamus, hippocampus.

🧩 Brain Tissue & Fibers

Q12. How is the thalamic structure organized?

A. Gray–white–gray pattern.

Q13. What is gray matter made of?

A. Neuron cell bodies.

Q14. What is white matter made of?

A. Axons connecting cells.

Q15. What do association fibers connect?

A. Within one hemisphere (e.g., arcuate fasciculus).

Q16. What do commissural fibers connect?

A. Between hemispheres (e.g., corpus callosum).

Q17. What do projection fibers connect?

A. Cortex ↔ subcortex, carry sensory & motor signals.

🧠 Cranial Nerve Origins

Q18. Which nerves originate in the midbrain?

A. III (Oculomotor), IV (Trochlear).

Q19. Which nerves originate in the pons?

A. V (Trigeminal), VI (Abducens), VII (Facial), VIII (Vestibulocochlear).

Q20. Which nerves originate in the medulla?

A. IX (Glossopharyngeal), X (Vagus), XI (Accessory), XII (Hypoglossal).

⚠️ Watershed Zones

Q21. What are watershed zones?

A. Border artery areas prone to ischemia or stroke.