Specific changes in conditioned responding following neurotoxic damage to the posterior parietal cortex.
The central nucleus (CN) of the amygdala and basal forebrain cholinergic projections to the posterior parietal cortex (PPC) are involved in regulating changes in attentional processing of conditioned stimuli. In a previous study, lesions of the CN produced a deficit in conditioned orienting behavior (rearing on the hind legs) when a visual stimulus was paired with food. Unconditioned orienting (rearing to nonreinforced presentations of the stimulus) and conditioned food cup behavior were unaffected. The present study examined the contribution of the PPC to attentional orienting behavior. Damage to the PPC did not affect orienting behavior but produced deficits in food cup behavior. These findings help define the specific contributions of the PPC to attentional processing and associative learning.
Bucci
David J
DJ
Department of Psychological and Brain Sciences, Dartmouth College, Hanover, NH 03755, USA. david.j.bucci@dartmouth.edu
Chess
Amy C
AC
D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D001930:Brain Injuries / Q000139:chemically induced* / Q000473:pathology / Q000503:physiopathology; D003214:Conditioning, Classical / Q000187:drug effects / Q000502:physiology*; D007051:Ibotenic Acid / Q000633:toxicity*; D008297:Male; D009498:Neurotoxins / Q000633:toxicity*; D009949:Orientation / Q000502:physiology*; D010296:Parietal Lobe / Q000503:physiopathology*; D010775:Photic Stimulation / Q000379:methods; D051381:Rats; D020318:Rats, Long-Evans; D013997:Time Factors
D009498:Neurotoxins; D007051:Ibotenic Acid