25 Suboccipital Craniectomy: Retromastoid Approach for Acoustic Schwannoma -- 26 Suboccipital Craniectomy: Retromastoid Approach for Trigeminal Neuralgia -- 27 Suboccipital Craniectomy: Midline and Paramedian Approach -- 28 Combined Occipital-suboccipital Craniotomy -- 29 Posterior Fossa Arteriovenous Malformation -- 30 Aneurysms of the Vertebral Artery -- 31 Glomus Jugulare Tumor (Chemodectoma) -- 32 Meningioma of the Foramen Magnum -- 33 Cervical Cordotomy -- 34 Cervical Laminectomy -- 35 Cervical Radiculoneuropathy: Herniated Intervertebral Disk and Spondylosis -- 36 Lumbar Radiculoneuropathy -- 37 Intramedullary Spinal Cord Tumor: Ependymoma -- 38 Cauda Equina: Conus Medullaris Ependymoma -- 39 Intra- and Extramedullary Tumor: Thoracic Meningioma -- 40 Intra- and Extradural Tumor: Dumbbell Schwannoma -- 41 Carotid Endarterectomy -- 42 Surgery of Peripheral Nerves -- 43 Hypoglossal-Facial Anastomosis