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Postsynaptic Potentials and Morphological Features of Tectal Cells in Homing Pigeons

Science China Chemistry 1993年第3期36卷 297-304页

作者：吴冈义王书荣颜坤 Laboratory for Visual Information Processing Institute of Biophysics Academia Sinica Beijing 100101 PRC

In this study postsynaptic potentials responding to the electrical stimulation of the optic nerve and the nucleus isthmipars parvocellularis (Ipc) were intracellularly recorded from 86 tectal cells in pigeons, 13 of which were marked with Lucifer yellow (LY). According to types of postsynaptic potentials and their succesion, the postsynaptic responses could be classified into four types: excitatory postsynaptic potential (EPSP)-inhibitory postsynaptic potential (IPSP) sequence (EI type), E, I and IE *** them, E or EI responses were mainly produced to the optic nerve stimulation, while the electrical stimulation of the lpc elicited I responses in more than half the recorded ***-marked tectal cells included five ganglionic cells, four pyramidal cells, two bipolar cells and two stellate *** ganglionic cells were mainly located in tectal layers Ⅲ and Ⅳ, whereas the others were in layer Ⅱ.It appears from both intracellular recordings and fluorescent marking. that there is some correlation betwe n the morphological features and the postsynaptic response types of tectal cells.

关键词： homing pigeon nucleus isthmi tectum postsynaptie potentials electrical stimulation fluorescent marking.

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