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Recurrent Neural Pathways in Motion and Shape Visual Perception: a TMS Study

Student: Zhozhikashvili Nataliia

Supervisor: W.Joseph MacInnes

Faculty: Institute for Cognitive Neuroscience

Educational Programme: Cognitive Sciences and Technologies: From Neuron to Cognition (Master)

Year of Graduation: 2020

This work presents a research project focused on the role of feedback neuronal connections in the cerebral cortex in the process of visual perception. It is known that various areas of the cortex are connected not only with feedforward, but also with feedback neuronal paths (Felleman & Van Essen, 1991). However, there is very little literature on the role of these feedback connections. The purpose of this study is to prove the need for a recurrent processing of visual information for successful performance of visual tasks. In this study, we tried to dissociate two recurrent neuronal pathways of visual information flow in the cerebral cortex: a recurrent loop between the primary visual (V1) and middle temporal (MT) areas for the motion detection process and a recurrent loop between the V1 and the lateral occipital (LO) areas for the shape detection process. For this purpose, we used transcranial magnetic stimulation (TMS) and the double dissociation method.

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