To move or not: previous experience in a runway avoidance task determines the appearance of hippocampal Type 2 sensory processing theta.
Rats in a runway avoidance task responded to a test shock probe with a period of immobility lasting from 2 to 6s. The shock avoidance-trained group displayed hippocampal theta during the immobility response. The inescapable shock group, in contrast, displayed large amplitude irregular activity (LIA). Following reversal training to escapable shock, all shock avoidance-trained rats responded with LIA and inescapable shock trained rats, reversed to shock avoidance, displayed theta.
Bland
B H
BH
Department of Psychology, Behavioral Neuroscience Research Group, The University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada. bhbland@ucalgary.ca
Derie-Gillespie
D
D
Mestek
P
P
Jackson
J
J
Crooks
R
R
Cormican
A
A
D000818:Animals; D001245:Association Learning / Q000502:physiology*; D001362:Avoidance Learning / Q000502:physiology*; D006624:Hippocampus / Q000502:physiology*; D046353:Immobility Response, Tonic / Q000502:physiology; D033182:Intention; D008606:Mental Processes / Q000502:physiology*; D051381:Rats; D011930:Reaction Time / Q000502:physiology; D012193:Reversal Learning / Q000502:physiology; D013826:Theta Rhythm