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. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Exp Neurol. 2008 Oct 22;215(1):167–177. doi: 10.1016/j.expneurol.2008.10.003

Figure 1.

Figure 1

Place cell recording chamber and examples of two place cells and an interneuron. (A) Cartoon of recording chamber with rat connected to cable. A cue card, designated as gray, occupies one region of the recording chamber wall. (B) Example of place cell. Pixel rates were coded in the sequence: yellow, orange, red, green, blue and purple, in order from lowest to highest firing frequency. The firing rate was exactly zero for yellow pixels. The firing field was located at approximately 5 o’clock. Waveforms of the action potentials from the tetrode were displayed before the rate map. Each tracing was from a single electrode in the tetrode. (C) Place cell with maximum firing field at approximately 1 o’clock. (D) Example of interneuron. Interneurons have higher firing rates than place cells and fire do not demonstrate preferential location firing.