Peter Peyk

Peter Peyk

Dr.

About

38
Publications
7,170
Reads
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1,430
Citations
Introduction
Psychophysiological data analysis methods and software development (EEG, EMG, ECG, EDA, Eyetracking, ...) Emotion recognition Fear conditioning / generalization
Additional affiliations
April 2017 - August 2021
University Hospital Zürich
Position
  • Laboratory Manager
September 2009 - March 2017
Universität des Saarlandes
Position
  • Laboratory Manager
July 2005 - September 2009
University of Basel
Position
  • Laboratory Assistant
Education
June 2005 - June 2008
University of Basel
Field of study
  • Psychology
June 2005 - June 2008
University of Basel
Field of study
  • Psychology
April 1998 - September 2002
Universität Konstanz
Field of study
  • Psychology

Publications

Publications (38)
Article
Full-text available
The Fast Friends Procedure (FFP) is a widely used experimental paradigm to induce emotional intimacy. Besides exploring the validity of a German translation of the paradigm (n = 46), we developed an extension of the FFP that induces sexual intimacy and assessed heart rate, high-frequency heart rate variability, and electrodermal activity responses...
Article
Full-text available
Background: The immune checkpoint molecule PD-L1 represents an important target in oncological immune therapy. The aim of our study was to evaluate PD-L1 expression and the composition of the tumor microenvironment (TME) in Kaposi sarcoma. Methods: Immunohistochemical stains were performed for PD-L1, CD3, CD33, CD68, and CD168 in 24 Kaposi sarco...
Article
Full-text available
Covert facial mimicry involves subtle facial muscle activation in observers when they perceive the facial emotional expressions of others. It remains uncertain whether prototypical facial features in emotional expressions are being covertly mimicked and also whether covert facial mimicry involves distinct facial muscle activation patterns across mu...
Preprint
Full-text available
Background: Delirium is the most common neuropsychiatric disorder seen in hospitalised patients. Current guidelines recommend only using antipsychotics with distressed patients. Nonetheless, in routine clinical practice, multiple psychotropics are commonly administered. More evidence on the short-term benefits of various management approaches in pa...
Article
Full-text available
Background: Individuals with a high prevalence of child maltreatment, e.g. those with borderline personality disorder, tend to see neutral facial expressions as negative. Objective: Our aim was to assess whether this bias is present in individuals with posttraumatic stress disorder (PTSD) and whether it is linked to child maltreatment. Methods: Thi...
Article
Full-text available
Individuals with post-traumatic stress disorder (PTSD) show abnormalities in higher-order emotional processes, including emotion regulation and recognition. However, automatic facial responses to observed facial emotion (facial mimicry) has not yet been investigated in PTSD. Furthermore, whereas deficits in facial emotion recognition have been repo...
Article
Full-text available
Heart rate (HR) alterations in the immediate aftermath of trauma-exposure have been proposed to be potentially useful markers for child and adolescent posttraumatic stress disorder (PTSD). However, it is not yet clear if this holds true for measures taken more distal to the trauma, and no studies have investigated the predictive validity of more se...
Article
Full-text available
Social threat detection is important in everyday life. Studies of cortical activity have shown that event-related potentials (ERPs) of motivated attention are modulated during fear conditioning. The time course of motivated attention in learning and extinction of fear is however still largely unknown. We aimed to study temporal dynamics of learning...
Article
Full-text available
Psychophysiological science employs a large variety of signals from the human body that index the activity of the peripheral nervous system. This allows for studying interactions of psychological and physiological processes that are relevant for understanding cognition, emotion, and psychopathology. The multidimensional nature of the data and the i...
Article
Full-text available
Dogs are known to have stress and anxiety reducing effects. Several studies have shown that dogs are able to calm people during cognitive and performance stressors. Recently, therapy dogs have been proposed as a treatment adjunct for post-traumatic stress disorder patients. In this study we aimed to investigate, whether dogs also have anxiety-and s...
Article
Full-text available
EMEGS (electromagnetic encephalography software) is a MATLAB toolbox designed to provide novice as well as expert users in the field of neuroscience with a variety of functions to perform analysis of EEG and MEG data. The software consists of a set of graphical interfaces devoted to preprocessing, analysis, and visualization of electromagnetic data...
Article
Previous research has yielded evidence of attentional biases for food-related cues in binge eating disorder (BED) using behavioural measures such as the Stroop and dot probe paradigm. Being a more direct measure of attentional processing, the present study used event related potentials (ERPs) to test reactivity to high caloric and low caloric food...
Article
Event-related potential (ERP) studies of affective picture processing have demonstrated an early posterior negativity (EPN) for emotionally arousing pictures that are embedded in a rapid visual stream. The present study examined the selective processing of emotional pictures while systematically varying picture presentation rates between 1 and 16 H...
Article
Full-text available
Recent functional magnetic resonance imaging (fMRI) and event-related brain potential (ERP) studies provide empirical support for the notion that emotional cues guide selective attention. Extending this line of research, whole head magneto-encephalogram (MEG) was measured while participants viewed in separate experimental blocks a continuous stream...
Article
Blood phobia differs from other phobias and anxiety disorders in that no attentional bias for blood-related stimuli has been consistently observed. The present study aimed at clarifying this characteristic by investigating electromagnetic brain activity to blood-related and -unrelated pictures in high blood-fearful and non-fearful individuals. Rela...
Article
Electroencephalographic event-related brain potentials were recorded as subjects read, without further instruction, consecutively presented sequences of words. We varied the speed at which the sequences were presented (3 Hz and 1 Hz) and the words' emotional significance. Early event-related cortical responses during reading differentiated pleasant...
Article
Affective startle modulation in the electromyographic (EMG), auditory startle evoked potentials, and visually evoked potentials (VEPs) were assessed while subjects evaluated pleasant, unpleasant, and neutral adjectives. Acoustic startle probes were presented at random time points 2.5-4.0 s after word onset. The visual P2 and P3 potentials were gene...
Article
A current goal of affective neuroscience is to reveal the relationship between emotion and dynamic brain activity in specific neural circuits. In humans, noninvasive neuroimaging measures are of primary interest in this endeavor. However, methodological issues, unique to each neuroimaging method, have important implications for the design of studie...
Article
How does the brain learn a foreign language or relearn speech after a stroke? How do changes in the brains of trauma victims lead to recurring anxiety states, and how can this condition be treated? Specialists in a variety of disciplines, including biology, linguistics, math- ematics, medicine, physics and psychology, investigate these questions u...

Projects

Projects (2)
Project
EMEGS (ElectroMagnetic EncaphaloGraphy Software) is an open source software for psychophysiological data analysis. Visit the project website at http://www.emegs.org ! There are two versions available: the original MATLAB based package which requires the MATLAB environment and a stand-alone Qt based version.