A. Advances.- Endoneurosurgery: Endoscopic Intracranial Surgery.- Historical Introduction.- The Hopkins Advances.- Light Sources.- Light Concentration.- Colour Balance.- Heat Output.- Manipulations.- Endoneurosurgery and Hydrocephalus.- Intraventricular Tumour Biopsy.- Endoscopic Photography.- Other Diseases.- Small Flexible Endoscopes.- Sterilising Techniques.- Future Developments.- Artificial Cerebrospinal Fluid Solution.- References.- Evoked Potential Monitoring in Neurosurgical Practice.- 1. The Use of Somatosensory Evoked Responses.- Somatosensory Evoked Responses in Vascular Diseases of the Brain.- Methods.- Electrodes and Montage.- Stimulation.- Recording Apparatus.- The Measurement of SSEP a Prognostic Guide in Subarachnoid Hemorrhage.- The Relationship Between Conduction Time, Prolongation and Clinical Deterioration.- The Use of Somatosensory Evoked Responses as a Monitor During Intracranial Aneurysm Surgery.- Techniques.- >SSEP Recording as a Monitor During Temporary Vascular Occlusion.- Somatosensory Evoked Potential Recording and the Use of Somatosensory Evoked Responses in Head Injury Management.- Clinical Factors Related to Outcome.- SEP Related to Outcome.- Progressive Change in SEPs.- 2. Visual Evoked Response Monitoring.- 3. Methodology.- Recording Technique and Wave Identification.- VEP as a Guide to Manipulation of the Optic Pathways During Surgery.- Conclusions.- 4. The Use of Brain Stem and Other Auditory Evoked Potentials.- Brain Stem Auditory Evoked Potentials in Head Injury.- Use of Brain Stem Evoked Responses During Posterior Fossa Surgery.- Electrocochleographic Monitoring During Acoustic Neuroma Surgery..- The Technique of Peroperative Electrocochleography.- 5. Spinal Cord Monitoring.- References.- The Biological Role of Hypothalamic Hypophysiotropic Neuropeptides.- 1. Introduction.- 2. Thyrotropin Releasing Hormone (TRH).- 2.1. Distribution of TRH.- 2.2. TRH as a Hypophysiotropic Hormone.- 2.3. Pathophysiology of TRH.- 2.4. Clinical Utilization of TRH.- 2.4.1. Diagnosis of Thyroid Disorders.- 2.4.2. TRH in the Diagnosis of Hypothalamic-Pituitary Disease.- 2.4.3. Diagnostic Use of TRH in Disorders of PRL Secretion.- 2.4.4. TRH as a Diagnostic Aid in Acromegaly.- 2.4.5. Therapeutic Aspects of TRH.- 3. Gonadotropin Releasing Hormone (GnRH).- 3.1. Distribution of GnRH.- 3.2. GnRH as a Hypophysiotropic Hormone.- 3.2.1. Physiological Role of Endogenous GnRH.- 3.2.2. Stimulation of Gonadotropin Secretion with GnRH.- 3.3. Pathophysiology of GnRH Secretion.- 3.4. Clinical Utilization of GnRH.- 3.4.1. GnRH in the Diagnosis of Gonadal Disorders.- 3.4.2. GnRH-Test in Hyperprolactinemic Disorders.- 3.4.3. GnRH in Acromegaly.- 3.4.4. Treatment with GnRH.- 3.5. Superactive GnRH Agonists.- 4. Corticotropin Releasing Hormone (CRH).- 4.1. Structure of CRH.- 4.2. Distribution of CRH.- 4.3. Measurement of CRH.- 4.4. CRH as a Hypophysiotropic Hormone.- 4.5. Pathophysiology of CRH.- 4.6. Clinical Utilization of CRH.- 4.6.1. Use of CRH in the Differential Diagnosis of Adrenal Failure.- 4.6.2. Use of CRH as a Diagnostic Aid in Cushing’s Syndrome.- 5. Growth Hormone Releasing Hormone (GRH).- 5.1. Structure and Biological Activity of GRH.- 5.2. Distribution of GRH.- 5.3. Measurement of GRH.- 5.4. Clinical Utilization of GRH.- 5.4.1. Biological Activity of GRH in Normal Subjects.- 5.4.2. Evaluation of Anterior Pituitary Function with GRH.- 5.4.3. Use of GRH in the Differential Diagnosis and Treatment of Pituitary Dwarfism.- 5.4.4. GRH as a Diagnostic Aid in Acromegaly.- 6. Somatostatin (SRIF).- 6.1. Distribution of Somatostatin.- 6.2. Physiological Role of Somatostatin.- 6.2.1. Somatostatin as a Hypophysiotropic Hormone.- 6.2.2. Measurement of Somatostatin.- 6.3. Pathophysiology of Somatostatin.- 6.4. Clinical Use of Somatostatin.- 7. Hypothalamic Hormones Regulating Prolactin Secretion.- 7.1. Prolactin Inhibiting Factor.- 7.2. Prolactin Releasing Factor.- 7.3. Clinical Utilization of Hypothalamic Hormones Regulating PRL Secretion.- 8. Summary.- References.- B. Technical Standards.- Sphenoidal Ridge Meningioma.- First Symptoms.- Clinical Examination.- Investigations.- Plain X-Rays.- CT-Scan.- EEG.- Gamma-Scan.- MRI.- Angiography.- General Surgical Considerations.- The Decision for Operation in Sphenoidal Ridge Meningiomas.- Preoperative Care.- Anaesthesia.- Positioning the Patient on the Operation Table.- Surgical Management of Sphenoidal Ridge Meningiomas.- Management of Deep-seated (Medial) Sphenoidal Meningiomas.- Removal of Lateral Sphenoidal Wing Meningiomas.- Management of “en plaque” and Invasive Meningiomas.- Postoperative Care.- Results.- Acknowledgments.- References.- Congenital Spinal Cord Tumors in Children.- 1. Introduction: Comments on Classification and Embryology.- 2. Dermoid and Epidermoid Cysts.- A. Embryology.- B. Clinical Features.- C. Radiological Investigations.- D. Surgical Management and Follow-up.- E. Discussion.- 3. Neurenteric Cysts.- A. Embryology.- B. Clinical Features and Presentation.- C. Radiology.- D. Surgical Management and Follow-up.- E. Discussion.- 4. Teratomatous Cysts.- A. Embryology.- B. Clinical Features.- C. Case Presentation.- 5. Intraspinal Teratomas.- A. Embryology.- B. Clinical Features.- C. Case Presentations.- 6. Lipomas.- A. Embryology.- B. Clinical Features.- C. Case Presentations.- 7. Spinal Arachnoid Cysts.- 8. Congenital Malignant Tumors of the Spine.- 9. Summary.- References.- Controversial Views of Editorial Board on the Intraoperative Management of Ruptured Saccular Aneurysms.- 1. What Is the Place of Lumbar CSF Drainage in the Operative Management of Aneurysms’?.- 2. In the Presence of Considerable Dural Tension and no Evidence of Hydrocephalus on the CT, what Should Be Done? Should the Dura Be Opened?.- 3. If Brain Swelling Is Present Should Brain Resection Be Performed?.- 4. In the Presence of an Aneurysm Hematoma Should It Be Removed Before Tackling the Aneurysm Neck?.- 5. Is Operating on Aneurysms at the Present Time Justifiable Without a Microscope? What About Loupes?.- 6. Is Self Retaining Retraction Absolutely Necessary?.- 7. Should Mean Arterial Pressure Be Recorded and Should Measurements of Pulmonary Artery Pressure Be Made?.- 8. What Is the Place of Arterial Hypotension and Temporary Clipping?..- 9. Should Bipolar Coagulation Be Used to Reduce the Size of the Sac or to Reduce the Caliber of Its Neck?.- 10. What Is the Preferred Method of Occlusion of the Neck, Which Clip? Are Ligatures ever Necessary?.- 11. Is Coating a Safe Procedure.- 12. What Should Be Done when an Intraoperative Rupture Occurs?.- 13. What Should Be Done when there is Obvious Spasm of the Internal Carotid Artery at Operation?.- 14. What Is Your View of Cardiac Arrest and Hypothermia?.- 15. What Should Be Done when a Junior Surgeon Calls for Help During an Operation.- Conclusion.- Author Index.