Supervisor: BUZÁS, Péter
Co-supervisor: Dr. KÓBOR, Péter
This project concerns the biological basis of colour vision. We have recently discovered a cell population in the lateral geniculate nucleus of the cat thalamus, which represents an ancient form of the blue-yellow colour opponent visual pathway also found in humans. In this project, we try to follow this pathway towards the retina as well as the visual cortex using electrophysiological, tract tracing and immunocitochemical methods. Our research aims at a better understanding of the evolutionary basis and cortical mechanisms of human colour vision.
Supervisor: KÓBOR, Péter
Co-supervisor: Dr. BUZÁS, Péter
In this research, we examine the impact of cortical feedback on the lateral geniculate nucleus (LGN, i.e. the relay nucleus of the visual pathway) in awake, freely moving cats. Surprisingly, LGN receives more synaptic input from cortical neurones than from retinal afferents. Despite this downstream dominance, LGN has been thought to be a simple relay station for a long time, and the role of the corticogeniculate feedback in visual processing is still poorly understood. Earlier, our research group described thalamic neurones from the cat LGN. Now, we would like to study how the feedback coming from the visual cortex can modulate the activity of cells in the LGN and if this effect is different among the cell types. In our laboratory, students will have the opportunity to study trained, behaving cats using telemetric (wireless) electrophysiology, and they can learn how to analyse data from EEG and single unit recording. Our research will contribute to understand the corticogeniculate feedback better.