People

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University of Münster, Germany University of Bologna, Italy
Markus Lappe Patrizia Fattori
Svenja Gremmler Annalisa Bosco
Anne Meermeier Michela Gamberini
Rebekka Lencer Matteo Filippini
Sabine Tepper Claudio Galletti
Niklas Stein
Marburg University, Germany Carl Zeiss Vision, Germany
Frank Bremmer Siegfried Wahl
Katharina Rifai
Western Sydney University, Australia Monash University, Australia
Tamara Watson Adam Morris
Gabrielle Weidemann Marcello Rosa
Konstantinos Chatzidimitrakis
University of Rochester, USA
Michele Rucci
Martina Poletti

Professor Markus Lappe, Principal InvestigatorMarkus Lappe

Institute for Psychology, University of Münster, Germany

Inspiration: I started out as a physicist interested in complex systems, chaos and neural networks. Then I learned that the brain is the most complex system of all – and the most interesting. I became interested in visual perception since it makes up so much of our daily experience. Currently, I am most fascinated by the way our actions are both driven by and shape the perception of the visual world.

Favourite scientific discovery: I am interested in the most basic aspect of space perception, namely seeing where things are. You might think that our eyes and brain, like a camera, see things where they really are but this is actually not true. There are many illusions that make you see objects in wrong places. Some of these are related to eye movements, or maybe just eye movement preparation. Sometimes, it is as if you see things where you want to look; a bit like the proverbial lost key that a person searches for under a lantern at night because this is the only place where there is light. I have recently found that a change in perceived location of objects can be produced by modifying eye movements. The idea is simple: we detect eye movements of a subject and whenever he or she tries to look at an object we slightly shift the object away from its regular position. Doing this for a while makes the subject see the object away from its real position right from the start, and even without making an eye movement. This shows, on the one hand, that eye movements influence our perception of space and, on the other hand, that our perception of space is not like a camera but malleable though action.

Links; https://www.uni-muenster.de/PsyIFP/AELappe/en/index.html


Svenja GremmlerDr Svenja Gremmler, Researcher

Institute for Psychology, University of Münster, Germany

Inspiration: The brain does an amazing job in providing a stable and colorful representation of the environment, developed from the information carried by the light reaching our eyes. The question how our visual system acts to maintain this stability of scene representation, which information carrying signals from different brain and body areas are used and in which way they are combined, spurs me to develop new experiments that help us to understand what we see and also what we sometimes do not see.

Favourite scientific discovery: We found that after motor learning due to manipulation of visual feedback for a certain time the perceived position of objects is shifted. This result tells us that the scene representation in our brain is not only constructed from the pure visual input from the eyes but that it also reflects motor knowledge.

Links: https://www.uni-muenster.de/PsyIFP/AELappe/personen/wulff.html


Annegret MeermeierAnne Meermeier, PhD student

Institute for Psychology, University of Münster, Germany

Inspiration: What fascinated me in the very beginning is how complex processes of visual perception could be studied using comparably straightforward methods. Using a high resolution camera we can make the fast and tiny movements of the eyes visible and study them in detail. The execution of eye movements follows physical metrics and regularities. The elegance of these tiny movements’ metrics fascinated me.

Favourite scientific discovery: Although we are mostly unaware of it, we make on average 3 eye movements per second. Making accurate saccades is crucial to perceive the world in high resolution. Our brain tunes our eye movements to be as accurate as possible, another thing that happens without us being aware of it. In my phd project until now, we found out that although we are not aware of this tuning process, this does not mean that it happens ‚automatically‘ and in a confined part of the brain. Rather it seems that what we look at can influence how we accurately we look there, a process that can only exist if several different brain regions interact.

Links; https://www.uni-muenster.de/PsyIFP/AELappe/personen/meermeier.html


Rebekka LencerRebekka Lencer, MD, Researcher

Department of Psychiatry and Psychotherapy, University of Münster, Germany

Inspiration:  Since I started studying eye movements in my doctoral thesis, I am fascinated by the eyes as a window to the brain representing at the same time the master and the slave of vision. Coming from the medical world I enjoy working in multidisciplinary teams together with physicists, psychologists, engineers and others to decipher the multiple complex mechanisms that drive and control eye movements and thus the perception of the world around us.

Favourite scientific discovery: When applying for my first job as a medical doctor I was very surprised to find out that psychiatrists have a keen interest in studying disturbances of eye movement control in patients, mostly with psychotic disorders. Since then I have investigated large groups of unmedicated first-episode and chronically ill patients with different psychotic disorders to identify specific eye movement patterns that can help understand in which way sensory information processing and motor control are disturbed in patients. Additionally, I have used brain imaging techniques to relate these eye movement disturbances to alterations in cortical networks subserving eye movement control. Notably, eye movement impairments are also observed in unaffected relatives making them a risk marker for genetic susceptibility to psychosis. In my most recent work I therefore used eye movement measures as a phenotype in genome wide association studies revealing distinct genetic alterations that may contribute to the genesis of eye movement control deficits in psychosis.


PatFattori.jpgProfessor Patrizia Fattori, Principal Investigator

Department of Pharmacy and Biotechnology, University of Bologna

Inspiration: I have always been fascinated by the power of our brain. I admire its complexity and its perfection in physiological conditions. Starting with my PhD, as a Neuroscientist I started studying the visual cortex, and then ended up with studying the circuits linking vision to eye and hand control.

Favourite scientific discovery: We all know that a visual receptive field of a neuron is the part of the retina from which the neuron sees the world; its retinal window. Well, this is not completely true. In the posterior parietal cortex, in a part of the cortex at the interface between visual perception and arm action control, we found visual cells of a peculiar type. These cells, called “real-position” cells, have a visual receptive fields that is stable in space despite eye movements. These neurons seem to represent a kind of window on the retina that opens and closes taking into account where we are directing our eyes. This is unusual for visual neurons and contributes to our perception of space.


bosco_annalisaDr Annalisa Bosco, Researcher

Department of Pharmacy and Biotechnology, University of Bologna

Inspiration: My research interests are addressed at studying how the brain controls the visuomotor responses. I study these topics at two different levels: a high-order level consisting in acquisition of neural data from cerebral cortex and an execution level consisting in acquisition of behavioural data. For me, the way we perceive and interact with the world always represented interesting field to discover and investigate from different perspectives.

Favourite scientific discovery: At neural level, I contributed at the study of functional properties of cortical area V6A located in the superior parietal lobule of the macaque. In particular, I focused my studies on the role of visual information in the encoding of reaching and grasping movements and which types of coordinate systems are used to plan and execute these movements.

At the behavioural level, I am interested on the interaction between perception and action to construct models that investigate the mechanisms underlying visuomotor integration in humans. Typically, a broad research area investigates how the brain uses information extracted from environment to select and guide the actions adaptively. The questions addressed by my current research consider that relation between perception and action is not one-sided, but action can influence perception.

Links; http://www.gallettilab.unibo.it/People.html/people%20bosco.html

Links; https://www.unibo.it/sitoweb/annalisa.bosco2


Dr Michela Gamberini, Researchermichela_gamberini

Department of Pharmacy and Biotechnology, University of Bologna

Inspiration: After the degree in Biological Sciences I was attracted by the research activity in life science and I started in Vision science during my PhD program. I started first with electophysiology of extrastriate visual areas of non-human primates to pass later on at the neuroanatomy of primate brain, coming back to my preferred analysis of histological materials with the microscope.

Favourite scientific discovery: My research activity concerns the study of the neurophysiology and the neuroanatomy of the primate visual system. In particular, I am interested in the recognition of cortical circuits and the anatomical organization of the primate cortex. I consider my relevant “scientific discovery“ the cytoarchitectonic subdivision of the parieto-occipital cortex of primate brain. I love observing histological tissue under the microscope and I have the patience and the perseverance to see even small differences in the cortical patterns. After outlining this anatomical tool, we described the cortical circuits that include the different areas that compose this large region of the brain, and we also anatomically subdivide in specific cortical areas the neurons that have been functionally studied.
Links: http://www.gallettilab.unibo.it/People.html/people%20gamberini.html


JpegMatteo Filippini, PhD student

Department of Pharmacy and Biotechnology, University of Bologna

Inspiration: I have always been attracted from complex systems and how they work. Brain is the most complex machine existing on the earth. In the past few decades, impressive progresses in brain recording techniques and ever-increasing computer computational power are bringing us closer and closer to understand how this extraordinary machine works. I can’t miss to be here!

Favorite Science Discovery: Recently I collaborated to shed some light on the functional roles of V6A, an area of posterior parietal cortex. This area is part of a network that integrate incoming vision, tactile and proprioceptive information to elaborate plan of actions. This information could possibly be extracted, decoded and used to drive neural prosthesis in order to restore basic mobility of patients with impaired mobility. V6A elaborates reaching trajectories and hand shapes necessary to interact with objects in our peripersonal space, that’s what makes V6A unique and good source for neural prosthesis applications.


bremmerProfessor Frank Bremmer, Principal Investigator

Marburg University

My current research focuses on (i) vision during eye-movements as well as on (i) multisensory representations of spatial and motion information in the primate brain. Given that we make eye-movements more often than our heart beats, I aim to understand if and how visual perception is modulated by various classes of eye-movements. In addition, I am concerned with the interplay of the visual, auditory and tactile senses for the perception of space and self-motion.

Links;https://www.uni-marburg.de/fb04/forschung/neuroscience/participants/physics/bremmer


DSC_0519 13x13cm.jpg
Dr. Siegfried Wahl, Principal Investigator

ZEISS Vision Science Lab | Carl Zeiss Vision International GmbH & Ophthalmic Research Institute, University Tuebingen

Inspiration: Physicist specialized in the field of neurobiology, biophysics and vision science with strong background in developmental biology and semiconductor physics. Broad application knowledge in biomedical disciplines, especially in intraoperative solutions and medical diagnosis. Working in the field of vision science using psychophysical methodologies focusing on an understanding of the visual system to generate new optometric and ophthalmic solutions.

Favorite scientific discovery: The complex interaction of light, the eye, the lens and eyeglasses is far from being fully deciphered. When the processing of the image on the retina in the brain is better understood, then I hypothesize a significant advance in the treatment of poor vision. The goal of my research is to gain an understanding of the development of vision and of the processing of the image in the brain in many different and dynamic situations and, on this basis, to develop new ways of providing natural, optimized vision to each individual. Another item on my agenda is to research into pathological changes to perception in order to enable their diagnosis and treatment by using suitable methods at an early stage. For these patients we aim to personalized solutions for enhanced vision.

Links; http://www.eye-tuebingen.de/zeiss-vision-science-lab/


Nr 59sw 5x7cm.jpgDr Katharina Rifai, Principal Investigator

ZEISS Vision Science Lab | Carl Zeiss Vision International GmbH & Ophthalmic Research Institute, University Tuebingen

Inspiration: From childhood on I was fascinated by light. Playing with prisms and lenses I was wondering how a physical property can change its appearance, and moderate the appearance of the world surrounding us. Thus I started my scientific life as a physicist, exploring the interaction of light and matter. Although very fascinating, I felt that the appearance of things in our everyday life was rather dominated by the subjective experience of light than the light itself. That is where I became interested in vision.

Favourite scientific discovery: Recently we looked into how the human visual system deals with challenging situations, and found, that the brain actively compensates for distortions to natural scenes, such as they would occur when looking through optical devices. That means, that our brain uses experience to correct misleading visual information for us, so we do not have to bother about it.

Links; http://www.eye-tuebingen.de/zeiss-vision-science-lab/members/


Tamara WatsonDr Tamara Watson, Principal Investigator

Western Sydney University, Australia

Inspiration: I’m fascinated by the brain and I’m interested in understanding how it works. Up to a quarter of the human brain is devoted to visual perception so its a great place to start.

Favourite scientific discovery: It has become almost a textbook standard to say that the brain is functionally blind during an eye movement. I found that the visual brain continues to process information around the time of a saccadic eye movement even though we don’t see the stimuli in question. I’m currently asking ‘what is it the brain really sees during an eye movement?’.

Links; https://www.westernsydney.edu.au/ssap/ssap/key_people/academic_staff_directory/doctor_tamara_watson


morrisDr Adam Morris, Principal investigator

Monash University, Melbourne Australia

Inspiration: We’re used to the idea we perceive the world around us by relying on our five senses: vision, audition, touch, smell, and taste; but this is wrong on multiple levels. Not only are there additional senses (e.g. balance, and our sense of where our limbs are positioned), but also our perception relies critically on signals from brain regions that control movements of the body. This becomes intuitive when you consider that most sensory events are caused by our own actions, such as the tactile sensation of your arm brushing your side, the sound of your footsteps, and the ever-changing view of the world that arises from eye movements. I’m interested in the neural mechanisms that allow us to nevertheless perceive our environment accurately, particularly in the case of vision and eye movements.

Favourite discovery: The brain needs to know where our eyes are looking to make sense of incoming visual information. We seek to understand how this works by recording the activity of neurons in visual cortex during eye movements. We have shown that in addition to information about the image on the retina, neurons carry a real-time gaze signal (i.e. the angle of the eyes in the head). This neural signal can be thought of as the brain’s visual “metadata”, much like how modern-day cameras store the location and line-of-sight for each image using GPS and compass technology. We believe that it is this signal that allows vision to work even though our eyes and bodies are almost constantly moving.

Links; https://monash.edu/research/explore/en/persons/adam-morris


rucciMichele Rucci, Principal investigator

Rochester University, USA

Research in my laboratory focuses on the computational and biological mechanisms underlying visual perception. Like other species, humans are not passively exposed to the incoming flow of sensory data. Instead, they actively seek useful information by coordinating sensory processing with motor activity. Behavior is a key component of sensory perception, as it enables control of input sensory signals in ways that simplify perceptual tasks. I believe that the link between motor activity and sensory processing is much deeper than commonly assumed and that elucidation of this synergy is critical for fully understanding sensory perception. For this reason, I follow an ecological approach that studies vision in conjunction with motor behavior (eye movements in particular) and the characteristics of natural environments.

Links; http://www.sas.rochester.edu/bcs/people/faculty/rucci_michele/index.html

 

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