Details about principle of recording Field potential in CA1

1 post / 0 new
lohengramm0730
lohengramm0730's picture
Details about principle of recording Field potential in CA1

HI, all:

  Recently, i am recording fEPSP from CA1.
  I don't understand why we could get the recording. What 's schematic circuit of recording?
  I use MED64 to record response. It has 64 channels.
  So when i stimulate at one channel. I could record many response from different channels.
  But I found that some of them have positive responses, and some of them have negative responses.
  How did that happen?
  I heard that is kind of source and sink theory.
  But I don't understand, could anyone teach me about that detail?
  Or tell me in which book could I find the answer.
  Thanks very much!