一次元電流源密度解析が副嗅球に適用できる A One-Dimensional Current Source-Density Analysis is Applicable to the Mouse Accessory Olfactory Bulb.
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鋤鼻器刺激によってマウス副嗅球に誘発される電場電位を副嗅球の層に直交する電極刺入路で記録した. 同じ深さでの電位の振幅と時間経過は, 格子状に選んだ5本の刺入路の間でほとんど差がなかった. 一次元電流源密度解析による電流密度像は三次元のそれとよく符合していた. さらに, 外叢状層に沿って誘発電位を記録した. 電位は各記録点でほぼ等しく, 一次元電流源密度解析はこの層に沿った正味の電流の流れのないことを示した. これらの結果は, 一次元電流源密度解析が副嗅球に適用できることを示している.
Field potentials evoked in the accessory olfactory bulb (AOB) of the mouse by a vomeronasal organ (VNO) volley were analyzed with current source-density (CSD) techniques. The potentials were recorded with an electrode oriented in the direction perpendicular to the laminae of the centre of the AOB in five tracks of equal spatial lattice for identical coordinates. There were little or no differences in the amplitude or time course of the potentials at equal depth among the five tracks. The CSD profile from a one-dimensional CSD analysis corresponded closely with that of a three-dimensional CSD analysis of a central track in the AOB. Furthermore, VNO-evoked field potentials were recorded in the AOB external plexiform layer while an electrode was being moved in the direction parallel to this layer. The potentials recorded at adjacent points were nearly identical and hence the related one-dimensional CSD calculations revealed no net currents along this layer. These results indicate that a one-dimensional CSD analysis is applicable to the mouse AOB.
- Journal of Veterinary Medical Science
Journal of Veterinary Medical Science 58(5), 485-488, 1996
JAPANESE SOCIETY OF VETERINARY SCIENCE