Attention-related unit activity in the frontal association cortex during a go/no-go visual discrimination task |
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| Authors: | Eva Bakay Pragay Allan F Mirsky Richard K Nakamura |
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| Institution: | 1. Department of Neurology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA;2. Department of Psychology, University of Toronto, Toronto, Ontario, Canada;1. Department of Psychology and Neuroscience Program, University of Michigan, Ann Arbor, USA;2. Department of Biomedical Sciences and Brain Institute, Florida Atlantic University, Boca Raton, FL, USA;1. School of Psychology, Cardiff University, Park Place, Cardiff CF10 3AT, UK;2. School of Pharmacy & Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, UK;3. Department of Applied Sciences, University of the West of England, Coldharbour Lane, Bristol BS16 1QY, UK;4. Department of Biosciences, University of Oslo, Postboks 1066, Blindern 0316, Oslo, Norway;1. AgroSup Dijon/INRA, UMR 1273 Métafort, 21079 Dijon, France;2. INRA, UMRH 1213 Herbivores, 63122 Saint-Genès-Champanelle, France;3. INRA, UR 1282 Unité d’Infectiologie et Santé Publique, 37380 Nouzilly, France;4. Laboratoire de Santé animale, Unité Zoonoses Bactériennes, ANSES, 94701 Maisons-Alfort Cedex, France;5. INRA, UMR 85 Physiologie de la Reproduction et des Comportements, 37380 Nouzilly, France;1. Department of Psychology, Université Libre de Bruxelles, Belgium;2. Department of Psychology, University of Münster, Germany;3. Fonds National de la Recherche Scientifique (FNRS), Belgium |
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| Abstract: | Unit activity related to a go/no-go visual discrimination task was studied in four rhesus monkeys. We recorded 272 task-related cells from frontal cortex in a region extending from the midprincipal sulcus to the central sulcus, and medially to the cingulate sulcus. Units located in anterior regions (dorsolateral prefrontal and anterior cingulate cortex) were typically related to both go and no-go trials (designated type II units) and showed similar ("symmetrical") activity in both kinds of trials; some of them also showed prestimulus ("anticipatory") activity. Such units were present but less common in posterior regions (postarcuate and precentral and posterior cingulate cortex). Units in these posterior regions were active predominantly in go trials (designated type I units). Also found posteriorly were "asymmetrical" type II cells whose activity was greater in go trials and occurred later in the trial, around the behavioral response. The anterior symmetrical and anticipatory type II units in the frontal association cortex were similar to such units described earlier in the brain stem reticular formation and may have similar functions in supporting focused and preparatory attention. On the other hand, asymmetrical type II units in the posterior frontal regions may have a role in the initiation of visually guided motor behavior. |
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