Summary
In rabbits anesthetized with chloralose-urethane, Ag-AgCl-KCl-Agar-glass capillary electrodes were slowly driven through the atlantooccipital membrane, the cisterna magna, 4. ventricle and medulla oblongata. The distribution of potentials along this way against a similar electrode on the outside of the atlanto-occipital membrane was observed.
The cerebrospinal fluid was found to be 12,4 mV, standard deviation ± 1,8 mV, positive against the electrode of reference. The medulla oblongata was slightly negative or had a potential around O against the electrode of reference.
The highest potential gradient is found on the arachnoid. The potential gradients from cerebrospinal fluid into the medulla oblongata were about 1 mV/cm.
The origin of the arachnoid potential is discussed.
The meninges act like the connective tissue sheath of peripheral nerve as a resistance against diffusion of electrolytes.
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Vorläufige Mitteilung: Helv. Physiol. Acta 13, C 22–C 23 (1955)
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Loeschcke, H.H. Über Bestandspotentiale im Gebiete der Medulla oblongata. Pflügers Archiv 262, 517–531 (1956). https://doi.org/10.1007/BF00362114
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DOI: https://doi.org/10.1007/BF00362114