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Dr. Daniel C. Kiper

 

daniel_kiper_web
Institute of Neuroinformatics
University of Zurich

Winterthurerstrasse 190
8057 Zurich

Tel. +41 44 635 3036
Fax +41 44 635 3053

kiper@ini.phys.ethz.ch

Main Goals, Keywords

Neurophysiology of the extrastriate visual cortex. I am mostly interested in the treatment of chromatic signals in the cortex of primates, and on the mechanisms involved in object perception and recognition. I am interested in the physiological properties of single cells, as well as in the anatomical and functional organizations of the cortical circuits underlying visual performance.
(Colour vision, Electrophysiology, Psychophysics, Visual Cortex, Object Perception).

Group Members

1 senior researcher, 2 PhD students, 1 technician

Previous and Current Research

My previous research focused primarily on the development of visual functions, both in normal and abnormal conditions. I studied the spatial vision of monkeys, and related their visual performance to the properties of single cells in their visual cortex. In particular, I studied the vision of monkeys raised with experimental strabismus, or anisometropia. My interest for visual development continued with studies of the effects of early cortical lesions on visual performance. This work involved the development of an animal model (ferrets), psychophysical studies of patients suffering from early cortical lesions, and modern neuroimaging techniques (fMRI). In addition, I started studying the perception of colour in humans, using psychophysical methods, before focusing on the treatment of chromatic information in the extrastriate cortex of macaque monkeys. My current research focuses primarily on this particular aspect of vision. I am setting up a laboratory to study the neurophysiological basis of colour perception, with a particular emphasis on higher-order colour mechanisms.

Future Projects

In addition to a series of studies on the characteristics of higher-order color mechanisms, I also want to study phenomena such as colour constancy, and the perception of unique hues. These will involve the recording of cortical cell activity in animals that are simultaneously performing a psychophysical task. Finally, I want to study the same mechanisms in human subjects, using modern EEG techniques.

Techniques and Equipment

The laboratory I am setting up consists primarily in an awake-behaving primate setup, that allows the recording of cortical activity in an animal performing a visual task. I use standard electrophysiological techniques to record extracellularly from several neurones. This work also involves some neuroanatomical techniques, such as the injection of antero-, and retrograde tracers, and histological techniques. In parallel, I use a simple computer setup to perform psychophysical studies in human subjects. In collaboration with other groups, I also use EEG recording techniques (Visual Evoked Potentials, Coherence Analysis) to study the functional organization of the human visual system.

Selected Publications

URL

http://www.ini.uzh.ch/people/kiper

 

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