Functional comparison of neuronal properties in the primate posterior hippocampus and parahippocampus (area TF/TH) during different behavioural paradigms involving memory and selective attention

Behavioural Brain Research
E SalzmannO D Creutzfeldt

Abstract

Monkeys were trained on a delayed match-to-sample (DMS) task. In addition a standardized behavioural trial was performed which involved an experimenter approaching the animal in certain sequence and presenting edible or other objects ('raisin trial'). Neuronal activity of 617 units was recorded in the posterior parahippocampus (PH) and in the posterior hippocampus (H). In many cases, we compared the activity of the same neuron in different tasks. 32.7% of the 455 PH neurons and 28.5% of the 130 H cells responded during the presentation of the visual stimuli in the DMS task. These responses were only mildly influenced by the physical dimensions of the visual stimulus, but often depended on the context in which the stimuli were presented. There was no differential response to the second stimulus that clearly depended on the nature of the first stimulus. 6.2% of the PH units, but none in H, responded in relation to the reward. 4.4% of the PH neurons, but none in H, showed a mild response during the interstimulus interval. 38.1% of 215 PH neurons and 37.8% of 45 H cells responded during one or more phases of the raisin trial. These responses were not related to the physical dimensions of the sensory stimuli. 210 PH and 41 H units w...Continue Reading

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Citations

Feb 16, 2005·Journal of Abnormal Psychology·Aprajita MohantyGregory A Miller
Jun 15, 2004·Human Brain Mapping·Catherine LozzaRose-Marie Marié
Apr 21, 2007·The European Journal of Neuroscience·Trichur R Vidyasagar, Ivan N Pigarev
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Dec 27, 2005·Pharmacology, Biochemistry, and Behavior·Aung SiR Maleszka
Aug 9, 2003·Journal of Neurophysiology·Nobuya Sato, Katsuki Nakamura
Oct 1, 1996·The International Journal of Neuroscience·J F DeFranceS Sands

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