ARU Research Facilities
-- Brain Stimulation Reward Lab

The brain stimulation reward facility (BSR) consisted of four experimental stations with four others under construction. This was usually the second (sometimes first) experimental technique in which graduate and undergraduate students were trained. For information about this experimental method, click here.
Not really an exit, but the entrance to the BSR lab. For security reasons, all behavioral testing laboratories were located within a secured lab complex.

Individual operant chambers were housed in sound-attenuating enclosures. Exhaust ventilation was ducted directly to the room's exhaust air handler, thereby minimizing room odors and other contaminations.This was important because many investigators have developed allergies to their experimental subjects (e.g., laboratory rats). Baffles were used to equilibrate the air exhaust from individual chambers. 
Operant chambers were connected to the control station by individual cables, each function requiring a minimum of one signal wire. Some functions, such as the stimulation pulse line, required additional wires such as separate signal grounding and electrical shielding.
Computers controlled the operant contingencies and the stimulation-pulse parameters. Specially designed constant-current generators provided the stimulation pulses.
Oscilloscopes were used to monitor stimulation pulses delivered to each subject. Problems could be quickly detected by observing irregular stimulation pulses during real-time analysis.
Operant chambers contained two levers and two cue lights for programming various experimental contingencies. Computer programs were written for conducting studies using simple rate measures, frequency-rate analysis, autotitration, and threshold-tracking procedures.
A small amount of interior workspace was also necessary for performing various procedures related to BSR testing and for students and technicians who remained in the room to monitor testing.

Copyright 2001 Michael A. Bozarth
Revised 08 November 2001 09:19 EST
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