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Brain & Nervous SystemPart of the Glaser Archive

THE EFFECT OF 9.31 GHZ PULSED MICROWAVE IRRADIATION ON THE LEVER PRESS BEHAVIOR OF OPERANTLY RESPONDING RHESUS MONKEYS

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Combined mean lever press rates did not differ significantly between irradiation and non-irradiation sessions.

Plain English Summary

Summary written for general audiences

Twelve rhesus macaques were trained to press a lever for apple juice while positioning their heads in front of a 9.311 GHz microwave horn. The microwave delivered a 0.5 μs pulse at an average power density of 150 mW/cm² at the monkey's head. Over 20 sessions of 15 minutes each, with 10 irradiation and 10 non-irradiation sessions, the combined mean lever press rate did not differ significantly. Individual monkeys showed significant differences in lever press rates between irradiation conditions. A transition experiment on 6 monkeys found no statistically significant effect on mean lever press rate when the radiation was switched on or off.

Why This Matters

The monkeys were housed in group cages with an attached operant chamber accessed through a guillotine door. Six monkeys from one group received irradiation for 10 daily sessions while six from another group served as controls, then the order was reversed. In the transition experiment, each session was divided into three 5-minute periods with the radar on or off in random sequences. Comparisons of behavior before and after the radiation transition showed no effect on lever pressing in the combined means of 15 sessions, though individual sessions varied considerably.

Cite This Study
Unknown (n.d.). THE EFFECT OF 9.31 GHZ PULSED MICROWAVE IRRADIATION ON THE LEVER PRESS BEHAVIOR OF OPERANTLY RESPONDING RHESUS MONKEYS.
Show BibTeX
@article{the_effect_of_9_31_ghz_pulsed_microwave_irradiation_on_the_lever_press_behavior__g5439,
  author = {Unknown},
  title = {THE EFFECT OF 9.31 GHZ PULSED MICROWAVE IRRADIATION ON THE LEVER PRESS BEHAVIOR OF OPERANTLY RESPONDING RHESUS MONKEYS},
  year = {n.d.},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

The microwave radiation operated at 9.311 GHz with a 0.5 μs pulse and an average power density of 150 mW/cm² at the monkey's head.
Tests of significance showed no significant difference in the combined mean lever press rate with or without irradiation.
Although combined means showed no significant difference, individually analyzed means showed significant differences, with examples of major differences from irradiation and from its absence.
Comparisons of behavior on either side of the transition from radiation on to off or vice versa failed to show any statistically significant effect on the mean lever press rate, although individual performances varied.
Twelve rhesus macaques were trained to enter an irradiation chamber and position their head in front of a microwave horn to press a lever for apple juice, and they were housed in group cages with an attached operant chamber.