This is the new website of the UP MS.  |  Back to the old website

  All colleagues of the unit

BUZÁS, Péter

BUZÁS, Péter

M.S. Ph.D.

associate professor , vice chair

Institute of Physiology

Telefon: 31749

Supervisor of the following TDK topics

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: JANDÓ, Gábor

Co-supervisor: Dr. BUZÁS, Péter

The goal of this project is to develop Cyclopic, anaglyphic random dot stereograms, which are suitable for studying both human and cat binocular visual information processing system without the necessity of calibration or matching the monitor colors to the applied color filters of the goggles. 

Supervisor: BUZÁS, Péter

Co-supervisor: Dr. JANDÓ, Gábor

This project concerns the biological basis of 3D vision. A recent theory claims that binocular information is processed by two functionally distinct, parallel channels in the brain. Colour information has different roles in these channels. Here, we would like to identify and characterise these two mechanisms by measuring responses to tricky movies, so-called dynamic random dot stereograms. We use psychophysical, electrophysiological (EEG, LFP and multichannel single-unit recording) and functional imaging (optical imaging, fMRI) methods.

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.

Supervisor: BUZÁS, Péter

Co-supervisor: Dr. BUZÁSNÉ, Telkes Ildikó

Vision is based on the information arriving from ganglion cells of the retina. The diverse types of ganglion cells receive their input from the photoreceptors through various neuronal networks that determine which aspect of the retinal image is trasmitted to the rest of the brain. Here, we aim at elucidating these networks using specific fluorescent labelling.

Supervisor: BUZÁS, Péter

Co-supervisor: Dr. CZIGER-NEMES, Vanda

In this research project we investigate the physiological foundations of 3D vision. During the process of stereopsis, the visual system has to find the corresponding image points that are projected to the retinas of the two eyes. We investigate these low level mechanisms of stereopsis with random dot correlogram stimuli using psychophysical methods. We explore to what extent these mechanisms are sensitive to interference using masking stimuli, and the information content and similarity of incoming visual information.