|Reference code: ||PT/FB/BL-2006-080.17|
|Location: ||Arquivo PCA - Pasta 19/2006|
|Understanding the role of dendrites in cortical information processing|
|Publication year: ||2010|
Objective of the proposed project is to develop and test new neural networks for visual perception and cognition, which includes dendrites as independent computational units. It is expected that the neural model with dendrites will exhibit greater capacity for information processing and its output will show greater similarity with human behavior and experience compared to previous models.
We used computer simulations in order to test the properties of the proposed models. Results of computer simulations are compared with the results obtained in previous brain imaging and behavioral research on humans and/or neurophysiological studies on primates. Also, we tested several predictions derived from the models using cognitive experiments on humans where we measured the speed and accuracy of responses to simple perceptual and cognitive tasks.
RESULTS AND CONCLUSIONS:
Computer simulations showed that new neural networks with dendrites are able to explain how attention influences neural activity in the visual cortex, how visual search is performed, how cortical activity gives rise to figure-ground organization and perception of temporal structure. Furthermore, we developed a neural model of semantic memory which is able to simulate recent experimental findings about interaction between language understanding and perception and action. We performed several cognitive experiments which showed that perceptual and motor variables facilitate semantic processing in agreement with the model. Our project provided computational evidence for the importance of dendrites for information processing in the nervous system and for understanding visual perception and cognition.
|Accessibility: ||Document does not exist in file|
|Secondary author(s): |
|Tkalcic, M., Šetic, M., Prorokvic, A., Valerjev, P.|
|Document type: |
|Domijan, D., Tkalcic, M., Šetic, M., Prorokvic, A., & Valerjev, P. (2010). Understanding the role of dendrites in cortical information processing. In Aquém e além do cérebro. Behind and beyond the brain. Proceedings of the 8th Symposium of Fundaçăo Bial (p. 220). Porto: Fundaçăo Bial.|
|Indexed document: ||No|
|Keywords: ||Attention / Computational model / Neural networks / Semantic memory / Visual perception|
Understanding the role of dendrites in cortical information processing