Intracranial and Intralabyrinthine Fluids

1. Front Matter

   Pages I-XIV

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2. Basic aspects of intracranial and intralabyrinthine fluids

   1. Stretch-activated channels and volume regulation in Opossum kidney cells

      • H.-A. Kolb

      Pages 1-8

   2. Extracellular space ionic composition, volume and geometry during neuronal activity and pathological states

      • E. Syková, A. Chvátal, L. Vargová, I. Vorišek

      Pages 9-22

   3. Longitudinal fluid movements in the cochlea under normal and abnormal conditions

      • A. N. Salt

      Pages 23-30

   4. The effect of volume regulatory mechanisms in auditory sensory cells to compensate for volume and pressure overload

      • N. Harada, A. Ernst

      Pages 31-37

   5. Ionic control of volume and pressure regulation in the labyrinth

      • E. Ferrary, C. Bernard, M. Teixeira, N. Julien, P. Bismuth, V. Couloigner et al.

      Pages 39-43

   6. Structural and functional aspects of the intracranial and intralabyrinthine fluid-filled compartments

      1. Communication routes between intracranial and intralabyrinthine fluid-filled spaces

         • J. Lang

         Pages 45-50

      2. Hydromechanical interactions of the intracranial and intralabyrinthine fluids

         • R. J. Marchbanks

         Pages 51-61

      3. Pressure relation between the labyrinthine and intracranial fluids: experimental study in cats

         • B. Carlborg, K. S. Konradsson, J. C. Farmer

         Pages 63-72

      4. Correlation of direct and non-invasive ICP measurements in cat

         • K. Wunderlich, Th. Brinker, A. Ernst

         Pages 73-80

      5. Experimental endolymphatic hydrops and inner ear pressure

         • A. Böhmer

         Pages 81-84

      6. Intralabyrinthine pressure transmission of intracranial pressure in the normal guinea pig

         • J. C. Andrews, D. Strelioff

         Pages 85-92

      7. Hydrocephalus and the status of endolymphatic membranes in temporal bones of children

         • Edgar Bachor, Collin S. Karmody

         Pages 93-103

      8. Composition, formation and flow of intralabyrinthine fluids

         • Werner Giebel

         Pages 105-116

      9. Differences in biochemical composition between perilymph, cerebrospinal fluid and blood plasma in the guinea pig

         • F. Scheibe, H. Haupt

         Pages 117-122

      10. Connections between the cerebrospinal fluid space and the lymphatic system of the head and neck in humans

          • M. Caversaccio, O. Peschel, W. Arnold

          Pages 123-128

      11. Magnetic resonance imaging of the intralabyrinthine fluids under physiological and pathological conditions

          • F. W. J. Albers, J. W. Casselman

          Pages 129-138

      12. High-resolution magnetic resonance imaging of the fine structure of the human cochlea

          • I. Koizuka, R. Seo, I. Kato, Y. Seo, M. Minralcalni, T. Kubo

          Pages 139-142

      13. Clinical significance of the large vestibular aquaeduct

          • B. P. Weber, B. Dietrich, C. Kappler, A. Ernst

          Pages 143-147

3. Clinical applications

   1. Diagnostic tools in monitoring and imaging

      1. Electrophysiological monitoring in neurosurgical patients with increased intracranial pressure

         • A. Møller

         Pages 149-164

There is no question that the topic of this meeting in Seeheim, Germany, on intracranial and intralabyrinthine fluids is pertinent. This was the first international meeting at which these two closely-related topics were addressed together. Combining the clinical and research aspects of fluid and pressure regulation in the intracranial and the intralabyrint­ hine compartments as well as discussions on the clinical implications of abnormal fluid pressure was an excellent idea. The presentations and discussions of both the clinicians and basic scientists who participated proved that the concept of having such a combined focused gathering was both original and relevant. The two topics of the meeting in Seeheim have much in common. Maintaining both the intracranial pressure (lCP) and the intralabyrinthine pressure within normal limits is important for the normal functions of both the central nervous system and the ear. The intracranial space and the intralabyrinthine space are closed compartments that communicate with each other in an intricate manner. Deviations from normal intracranial pressure result in specific symptoms and signs. Medical problems related to elevated intracranial pressure vary from subtle to severe. Accumulated knowledge indicates that there are adverse effects from even relatively small elevations in ICP. Elevations in ICP may cause injuries to the brain and the ear. Abnormal pressure in the ear may cause abnormal function and injury. Maintaining the intracranial pressure within normal limits depends on a normally functioning pressure regulation.

• Hydrocephalus
• Tinnitus
• clinical application
• diagnostics
• ear
• endoscopy
• head
• hearing
• intracranial pressure
• magnetic resonance imaging (MRI)
• neuronavigation
• regulation
• surgery
• therapy
• tumor

• Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Medizinische Hochschule Hannover, Hannover, Germany

  Arne Ernst

• NIPA Unit, Wessex Regional Center for Pediatric Surgery, Southampton, UK

  Robert Marchbanks

• Krankenhaus Nordstadt, Medizinische Hochschule Hannover, Hannover, Germany

  Madjid Samii

Policies and ethics