HEAD-MOUNTED, 8-CHANNEL AMPLIFIER RECORDS EEG AND UNIT-ACTIVITY IN FREELY MOVING RATS | Academic Article individual record
abstract

Electrographic recording from freely behaving experimental animals is a popular practice, but is fraught with technical difficulties. Reported herein is a head-mounted, multiple-channel operational amplifier (quad JFET) which has most of the features desired for such recording: (1) wide frequency response from DC to 4 MHz; (2) low noise; (3) high input impedance (1012Ω); (4) high slew rate (13 V/μs); (5) internally trimmed offset voltage; (6) multiple channels (ganged in sets of four); (7) low interchannel cross talk; (8) amplification of signal to reduce cable movement artifacts; (9) frequency bandwidth suitable for recording of EEG, multiple-unit activity, and single-unit activity; (10) low cost; and (11) size suitable for animals as small as rats.

author list (cited authors)
KLEMM, W. R., & BELTZ, W. D.
publication date
1985