82 results match your criteria: "Universities of Marburg[Affiliation]"

Dynamic representation of multidimensional object properties in the human brain.

bioRxiv

June 2024

Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda MD, USA.

Our visual world consists of an immense number of unique objects and yet, we are easily able to identify, distinguish, interact, and reason about the things we see within a few hundred milliseconds. This requires that we integrate and focus on a wide array of object properties to support specific behavioral goals. In the current study, we examined how these rich object representations unfold in the human brain by modelling time-resolved MEG signals evoked by viewing single presentations of tens of thousands of object images.

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Enhancing precision in human neuroscience.

Elife

August 2023

Department of Clinical Psychology, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.

Human neuroscience has always been pushing the boundary of what is measurable. During the last decade, concerns about statistical power and replicability - in science in general, but also specifically in human neuroscience - have fueled an extensive debate. One important insight from this discourse is the need for larger samples, which naturally increases statistical power.

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EEG Microstates in Social and Affective Neuroscience.

Brain Topogr

July 2024

Department of Social Neuroscience and Social Psychology, Institute of Psychology, University of Bern, Bern, Switzerland.

Social interactions require both the rapid processing of multifaceted socio-affective signals (e.g., eye gaze, facial expressions, gestures) and their integration with evaluations, social knowledge, and expectations.

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Visual perception: Contours that crack the ambiguity conundrum.

Curr Biol

July 2023

Department of Experimental Psychology, Justus Liebig University Giessen, 35394 Giessen, Germany, and Center for Mind, Brain and Behavior, Universities of Marburg, Giessen and Darmstadt, Germany. Electronic address:

A new study shows how the brain exploits the parts of images where surfaces curve out of view to recover both the three-dimensional shape and material properties of objects. This sheds light on a long-standing 'chicken-and-egg' problem in perception research.

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When we look at an object, we simultaneously see how glossy or matte it is, how light or dark, and what color. Yet, at each point on the object's surface, both diffuse and specular reflections are mixed in different proportions, resulting in substantial spatial chromatic and luminance variations. To further complicate matters, this pattern changes radically when the object is viewed under different lighting conditions.

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Article Synopsis
  • Scientists studied a special fat called PI(4,5)P2 that helps cells send signals and control different processes.
  • They looked at a protein called tubbyCT that sticks to PI(4,5)P2 and found that it gathers in special spots where the cell's outer layer meets another part called the endoplasmic reticulum.
  • This study showed that tubbyCT is important for understanding how these special connections work and could help reveal new functions of related proteins called TULPs.
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Article Synopsis
  • This study investigates impaired self-awareness of cognitive deficits (ISAcog) in Parkinson's disease (PD), especially in patients with mild cognitive impairment (PD-MCI), and compares it to healthy controls.
  • The research involved 63 PD patients and 30 healthy individuals, using cognitive assessments and neuroimaging techniques (MRI and FDG-PET) to explore the links between ISAcog and brain activity.
  • Findings show that PD-MCI patients exhibited greater ISAcog than healthy controls and PD patients without MCI, particularly with altered glucose metabolism in specific brain regions associated with cognitive awareness.
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Neural stem and progenitor cell (NSPC) transplants provide neuroprotection in models of acute brain injury, but the underlying mechanisms are not fully understood. Here, we provide evidence that caspase-dependent apoptotic cell death of NSPCs is required for sending survival signals to the injured brain. The secretome of dying NSPCs contains heat-stable proteins, which protect neurons against glutamate-induced toxicity and trophic factor withdrawal in vitro, and from ischemic brain damage in vivo.

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Article Synopsis
  • This study looked at how eye movements, called saccades, are affected in people with Parkinson's disease (PD) compared to healthy people.
  • Researchers studied 61 people with PD and 25 healthy controls using eye-tracking and cognitive tests to find different patterns in their saccade performance.
  • They discovered three groups with different types of eye movement issues connected to cognitive problems, suggesting that there are at least two opposite patterns of eye movement changes in PD that might explain confusing results from earlier studies.
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Background: Working memory (WM) training (WMT) is a popular intervention approach against cognitive decline in patients with Parkinson's disease (PD). However, heterogeneity in WM responsiveness suggests that WMT may not be equally efficient for all patients.

Objective: The present study aims to evaluate a multivariate model to predict post-intervention verbal WM in patients with PD using a supervised machine learning approach.

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Contributions of open-loop and closed-loop control in a continuous tracking task differ depending on attentional demands during practice.

Hum Mov Sci

October 2022

Department of Psychology and Sports Science, Justus Liebig University Giessen, Germany; nemolab, University of Giessen, Justus Liebig University Giessen, Germany; CMBB Center for Mind, Brain and Behavior, Universities of Marburg and Giessen, Germany. Electronic address:

Improving tracking performance requires numerous adjustments in the motor system, including peripheral muscle functions and central motor commands. These commands can rely on sensory feedback processing during tracking, i.e.

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Cross-paradigm integration shows a common neural basis for aversive and appetitive conditioning.

Neuroimage

November 2022

Department of Psychotherapy and Systems Neuroscience, Justus Liebig University, Giessen 35394, Germany; Bender Institute for Neuroimaging (BION), Justus Liebig University, Giessen 35394, Germany; Center of Mind, Brain and Behavior, Universities of Marburg and Giessen, Marburg 35032, Germany.

Sharing imaging data and comparing them across different psychological tasks is becoming increasingly possible as the open science movement advances. Such cross-paradigm integration has the potential to identify commonalities in findings that neighboring areas of study thought to be paradigm-specific. However, even the integration of research from closely related paradigms, such as aversive and appetitive classical conditioning is rare - even though qualitative comparisons already hint at how similar the 'fear network' and 'reward network' may be.

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Predictability shapes movement kinematics and grip force regulation in human object handovers.

Hum Mov Sci

October 2022

Neuromotor Behavior Laboratory, Department of Psychology and Sport Science, Justus Liebig University Giessen, Germany; Center for Mind, Brain and Behavior, Universities of Marburg and Giessen, Germany.

In contrast to a self-generated action, a human-to-human object handover represents a semi-predictable task, due to a lack of exact knowledge about the partner's future movement behavior. Thus far, it has not been determined which behavioral characteristics result from dealing with this prevailing uncertainty, although this distinction would enhance the understanding of underlying motor control strategies in such semi-predictable situations. Behavioral effects of mutual interaction during object handovers were therefore investigated in the current study, by comparing grip force profiles and kinematic data from predictable solo-handovers (between the two hands of one person) with data from semi-predictable partner-handovers.

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Rapid pre-attentive processing of a famous speaker: Electrophysiological effects of Angela Merkel's voice.

Neuropsychologia

August 2022

Research Group Phonetics, Institute of German Linguistics, Philipps-University Marburg, Germany; Research Center »Deutscher Sprachatlas«, Philipps-University Marburg, Germany; Center for Mind, Brain & Behavior, Universities of Marburg & Gießen, Germany. Electronic address:

The recognition of human speakers by their voices is a remarkable cognitive ability. Previous research has established a voice area in the right temporal cortex involved in the integration of speaker-specific acoustic features. This integration appears to occur rapidly, especially in case of familiar voices.

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The neural processing of speech and music is still a matter of debate. A long tradition that assumes shared processing capacities for the two domains contrasts with views that assume domain-specific processing. We here contribute to this topic by investigating, in a functional magnetic imaging (fMRI) study, ecologically valid stimuli that are identical in wording and differ only in that one group is typically spoken (or silently read), whereas the other is sung: poems and their respective musical settings.

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Behavioral and Electrophysiological Signatures of Error Processing.

Neuroscience

March 2022

Department of Psychology and Sport Science, Neuromotor Behavior Lab, Justus Liebig University, Giessen, Germany; Center for Mind, Brain and Behavior (CMBB), Universities of Marburg and Giessen, Germany.

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Predictions during language comprehension are currently discussed from many points of view. One area where predictive processing may play a particular role concerns poetic language that is regularized by meter and rhyme, thus allowing strong predictions regarding the timing and stress of individual syllables. While there is growing evidence that these prosodic regularities influence language processing, less is known about the potential influence of prosodic preferences (binary, strong-weak patterns) on neurophysiological processes.

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The NBA player Stephen Curry has a habit of turning away from the basket right after taking three-point shots even before the ball reaches the basket, suggesting that he can reliably predict whether the just released shot will hit or not. In order to use this "knowledge" to deliberately decide which action to take next, Stephen Curry needs conscious access to the results of internal processes of outcome prediction and valuation. In general, computational simulations and empirical data suggest that the quality of such internal predictions is related to motor skill level.

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Effects of Depression on Processing and Evaluation of Sexual Stimuli in Women.

J Sex Med

March 2022

Department of Psychotherapy and Systems Neuroscience, Psychology and Sport Science, University of Giessen, Giessen, Germany; Bender Institute of Neuroimaging, University of Giessen, Giessen, Germany; Center for Mind, Brain and Behaviour, Universities of Marburg and Giessen, Giessen, Germany.

Background: Sexual dysfunctions are commonly associated with depression by which women are particularly affected.

Aim: In the following study, we looked at which stage-early attention-related processes or later evaluation-related processes-of the processing of sexual stimuli deviations occur in depressed individuals.

Methods: We examined 96 women who either suffered from a major depressive disorder, or had recovered from it, and a healthy control group.

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