Academic Journal
Stable readout of observed actions from format-dependent activity of monkey’s anterior intraparietal neurons
| العنوان: | Stable readout of observed actions from format-dependent activity of monkey’s anterior intraparietal neurons |
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| المؤلفون: | Lanzilotto M., Maranesi M., Livi A., Ferroni C. G., Orban G. A., Bonini L. |
| المساهمون: | Lanzilotto, M., Maranesi, M., Livi, A., Ferroni, C. G., Orban, G. A., Bonini, L. |
| بيانات النشر: | National Academy of Sciences |
| سنة النشر: | 2020 |
| المجموعة: | Università di Parma: CINECA IRIS |
| مصطلحات موضوعية: | Action observation, Neural decoding, Parietal cortex, Visual invariance, Animal, Behavior, Female, Macaca, Male, Neuron, Parietal Lobe, Visual Perception |
| الوصف: | Humans accurately identify observed actions despite large dynamic changes in their retinal images and a variety of visual presentation formats. A large network of brain regions in primates participates in the processing of others’ actions, with the anterior intraparietal area (AIP) playing a major role in routing information about observed manipulative actions (OMAs) to the other nodes of the network. This study investigated whether the AIP also contributes to invariant coding of OMAs across different visual formats. We recorded AIP neuronal activity from two macaques while they observed videos portraying seven manipulative actions (drag, drop, grasp, push, roll, rotate, squeeze) in four visual formats. Each format resulted from the combination of two actor’s body postures (standing, sitting) and two viewpoints (lateral, frontal). Out of 297 recorded units, 38% were OMA-selective in at least one format. Robust population code for viewpoint and actor’s body posture emerged shortly after stimulus presentation, followed by OMA selectivity. Although we found no fully invariant OMA-selective neuron, we discovered a population code that allowed us to classify action exemplars irrespective of the visual format. This code depends on a multiplicative mixing of signals about OMA identity and visual format, particularly evidenced by a set of units maintaining a relatively stable OMA selectivity across formats despite considerable rescaling of their firing rate depending on the visual specificities of each format. These findings suggest that the AIP integrates format-dependent information and the visual features of others’ actions, leading to a stable readout of observed manipulative action identity. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000553288300013; volume:117; issue:28; firstpage:16596; lastpage:16605; numberofpages:10; journal:PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA; http://hdl.handle.net/11381/2886464; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85088176742 |
| DOI: | 10.1073/pnas.2007018117 |
| الاتاحة: | http://hdl.handle.net/11381/2886464 https://doi.org/10.1073/pnas.2007018117 |
| رقم الانضمام: | edsbas.36191863 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1073/pnas.2007018117 |
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