Circuit Models and Experimental Noise Measurements of Micropipette Amplifiers for Extracellular Neural Recordings from Live Animals
Figure 5
(a) Extracellular neural voltage spiking (green) acquired by the micropipette neural amplifier in the inferior colliculus (IC) of an anesthetized gerbil. The ears of the gerbil are attached to audio speakers and sound frequency sweeps are periodically played to the anesthetized gerbil. The recorded neural voltage spiking was recorded simultaneously with the sound frequency sweeps during the experiment. The magnitude of the sound sweep (blue) is plotted together with the neural voltage spiking (green) in the same graph to show that the neural spiking is only observed with the auditory stimulated. (b) The neural voltage (green) and the sound magnitude (green) of (a) are magnified in time for a period of 5 ms to show better details of both signals. (c) Individual neural voltages of (a) are plotted on top of one another. All individual neural signals have a similar temporal shape which indicates that the signals all originated from a single neuron.
