Chapter 1. The "Rules of Three" in the Posterior Cranial Fossa -- Chapter 2. Neural Structures: the Brainstem, Cerebellum, Cerebellar Peduncles, and Fourth Ventricle -- Chapter 3. Three Cerebellar Arteries: Superior Cerebellar Artery, Anterior Inferior Cerebellar Artery, and Posterior Inferior Cerebellar Artery.- Chapter 4. The Veins of the Posterior Cranial Fossa: Nomenclature.-Chapter 5. The Bridging Veins in the Posterior Cranial Fossa.- Chapter 6. Midline Suboccipital Approach and Its Variations for Fourth Ventricular or Cerebellar Hemispheric Lesions.- Chapter 7. Microsurgical Anatomy of the Cerebellomedullary Fissure and Variations of the Transcerebellomedullary Fissure Approach.- Chapter 8. The Cerebellopontine Angle: Basic Structures and the "Rules of Three".- Chapter 9. The Retrosigmoid Lateral Suboccipital Approach: Basic Approach and Variations.- Chapter 10. Anatomy for Microvascular Decompression Procedures: Relationships between Cranial Nerves and Vessels, Preoperative Images, and Anatomy for the Stitched Sling Retraction Technique.- Chapter 11. Microvascular Decompression Surgery for Trigeminal Neuralgia: Special Reference to the Infratentorial Lateral Supracerebellar Approach Using the Tentorial Stitched Sling Retraction Method.- Chapter 12. Microvascular Decompression Surgery for Hemifacial Spasm: the Lateral Suboccipital Infrafloccular Approach.- Chapter 13. Microvascular Decompression for Glossopharyngeal Neuralgia: Surgical Approaches Depending on the Offending Artery -- Chapter 14. Microsurgical Anatomy of the Internal Auditory Canal and Surrounding Structures and Vestibular Schwannoma Surgery -- Chapter 15. Meningiomas of the Cerebellopontine Angle: Classification and Differences in the Surgical Removal of Each Type through the Lateral Suboccipital Retrosigmoid Approach -- Chapter 16. Surgical Anatomy of the Posterior Part of the Foramen Magnum and the Posterior Paramedian Approaches.- Chapter 17. Surgical Anatomy of and Approaches through the Lateral Foramen Magnum: the Transcondylar Fossa and Transcondylar Approaches.- Chapter 18. The Temporal Bone: Basic Anatomy and Approaches to Internal Auditory Canal.- Chapter 19. Posterior and Anterior Transpetrosal Approaches -- Chapter 20. Microsurgical Anatomy of and Surgical Approaches to the Jugular Foramen -- Chapter 21. Occipital Artery-Posterior Inferior Cerebellar Artery Bypass Surgery.