A multichannel system for recording and analysis of cortical field potentials in freely moving rats
Resource
Journal of Neuroscience Methods 88 (1): 33-43
Journal
Journal of Neuroscience Methods
Journal Volume
88
Journal Issue
1
1
Pages
33--43
Date Issued
1999-04
Author(s)
Abstract
A system has been developed to record and analyze the cortical electrical activity from 16 different sites in freely moving rats. The hardware includes a 16-channel amplifier system whose high input impedance, low noise, small size, light weight and shielded multistrand connecting cable allow high quality multichannel recording of field potentials. The software developed for this system consists of data acquisition, data analysis and topographic mapping of cortical-evoked potentials as well as electroencephalograms. Cortical field potentials evoked by CO2-laser stimulation were compared between wakeful and pentobarbital-treated conditions. To investigate the background interference produced by sleep spindle, three kinds of reference-free methods (the Wilson, local average and weighted average methods) were utilized to compare the coherence between field potentials obtained from two cerebral hemispheres using monopolar vs. reference-free recordings.
Subjects
Amplifier; Chronic recording; EEG; Evoked potential; Nociception
Other Subjects
amplifier; animal experiment; animal model; article; brain cortex; brain depth stimulation; brain mapping; computer program; data analysis; electric potential; electroencephalogram; information processing; male; multichannel recorder; nociception; nonhuman; priority journal; rat; Animals; Carbon Dioxide; Computers; Consciousness; Electroencephalography; Evoked Potentials, Somatosensory; Fourier Analysis; Lasers; Locomotion; Male; Nociceptors; Rats; Rats, Wistar; Skin Temperature; Software; Somatosensory Cortex
Type
journal article