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  1. Article: Lassen Sie sich Ihre OP-Planung zeigen! Dr. med. Christian Stolz und sein Team

    Stolz, Christian

    Orthopress : Köln-Bonn-Aachen

    2022  Volume 28, Issue 3, Page(s) 42

    Language German
    Document type Article
    ZDB-ID 2213797-X
    Database Current Contents Medicine

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 6432: Show issues Location:
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  2. Conference proceedings: Knöcherne Rekonstruktion der Defekthöhle des Fersenbeines nach Fraktur und Infektverlauf – eine interdisziplinäre Herausforderung

    Stolz, Christian

    2019  , Page(s) AB32–31

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2019); Berlin; ; Berufsverband der Fachärzte für Orthopädie; 2019
    Keywords Medizin, Gesundheit
    Publishing date 2019-10-22
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/19dkou192
    Database German Medical Science

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  3. Article ; Online: Dissociable feedback valence effects on frontal midline theta during reward gain versus threat avoidance learning.

    Stolz, Christopher / Pickering, Alan D / Mueller, Erik M

    Psychophysiology

    2022  Volume 60, Issue 5, Page(s) e14235

    Abstract: While frontal midline theta (FMθ) has been associated with threat processing, with cognitive control in the context of anxiety, and with reinforcement learning, most reinforcement learning studies on FMθ have used reward rather than threat-related ... ...

    Abstract While frontal midline theta (FMθ) has been associated with threat processing, with cognitive control in the context of anxiety, and with reinforcement learning, most reinforcement learning studies on FMθ have used reward rather than threat-related stimuli as reinforcer. Accordingly, the role of FMθ in threat-related reinforcement learning is largely unknown. Here, n = 23 human participants underwent one reward-, and one punishment-, based reversal learning task, which differed only with regard to the kind of reinforcers that feedback was tied to (i.e., monetary gain vs. loud noise burst, respectively). In addition to single-trial EEG, we assessed single-trial feedback expectations based on both a reinforcement learning computational model and trial-by-trial subjective feedback expectation ratings. While participants' performance and feedback expectations were comparable between the reward and punishment tasks, FMθ was more reliably amplified to negative vs. positive feedback in the reward vs. punishment task. Regressions with feedback valence, computationally derived, and self-reported expectations as predictors and FMθ as criterion further revealed that trial-by-trial variations in FMθ specifically relate to reward-related feedback-valence and not to threat-related feedback or to violated expectations/prediction errors. These findings suggest that FMθ as measured in reinforcement learning tasks may be less sensitive to the processing of events with direct relevance for fear and anxiety.
    MeSH term(s) Humans ; Avoidance Learning ; Feedback ; Reward ; Reinforcement, Psychology ; Punishment ; Electroencephalography
    Language English
    Publishing date 2022-12-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209486-1
    ISSN 1540-5958 ; 0048-5772
    ISSN (online) 1540-5958
    ISSN 0048-5772
    DOI 10.1111/psyp.14235
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 502: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Conference proceedings: Einsatzmöglichkeiten des muskulär gestielten Fibulatransplantates am Unterschenkel für die vaskularisierte ossäre Augmentation und Rekonstruktion knöcherner Defekte – Aufarbeitung anhand von neun Fällen

    Stolz, Christian

    2017  , Page(s) WI42–137

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2017); Berlin; ; Berufsverband der Fachärzte für Orthopädie; 2017
    Keywords Medizin, Gesundheit ; M. peroneus brevis ; Fibulatransplantat ; Knochendefekt
    Publishing date 2017-10-23
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/17dkou391
    Database German Medical Science

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  5. Article ; Online: Openness to Experience is associated with neural and performance measures of memory in older adults.

    Stolz, Christopher / Bulla, Ariane / Soch, Joram / Schott, Björn H / Richter, Anni

    Social cognitive and affective neuroscience

    2023  Volume 18, Issue 1

    Abstract: Age-related decline in episodic memory performance is a well-replicated finding across numerous studies. Recent studies focusing on aging and individual differences found that the Big Five personality trait Openness to Experience (hereafter: Openness) is ...

    Abstract Age-related decline in episodic memory performance is a well-replicated finding across numerous studies. Recent studies focusing on aging and individual differences found that the Big Five personality trait Openness to Experience (hereafter: Openness) is associated with better episodic memory performance in older adults, but the associated neural mechanisms are largely unclear. Here, we investigated the relationship between Openness and memory network function in a sample of 352 participants (143 older adults, 50-80 years; 209 young adults, 18-35 years). Participants underwent functional magnetic resonance imaging (fMRI) during a visual memory encoding task. Functional memory brain-network integrity was assessed using the similarity of activations during memory encoding (SAME) scores, which reflect the similarity of a participant's memory network activity compared to prototypical fMRI activity patterns of young adults. Openness was assessed using the NEO Five-Factor Inventory. Older vs young adults showed lower memory performance and higher deviation of fMRI activity patterns (i.e. lower SAME scores). Specifically in older adults, high Openness was associated with better memory performance, and mediation analysis showed that this relationship was partially mediated by higher SAME scores. Our results suggest that trait Openness may constitute a protective factor in cognitive aging by better preservation of the brain's memory network.
    MeSH term(s) Young Adult ; Humans ; Aged ; Brain/diagnostic imaging ; Aging/psychology ; Cognition ; Memory, Episodic ; Personality Tests ; Magnetic Resonance Imaging
    Language English
    Publishing date 2023-08-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 2236933-8
    ISSN 1749-5024 ; 1749-5016
    ISSN (online) 1749-5024
    ISSN 1749-5016
    DOI 10.1093/scan/nsad041
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Conference proceedings: Wie kann die Verwendung einer Kollagen-Elastin-Matrix (MatriDerm®) zur Unterfütterung von Hauttransplantaten bei der Defektdeckung an Hand und Unterarm helfen?

    Stolz, Christian

    2016  , Page(s) 16dgh112

    Event/congress 57. Kongress der Deutschen Gesellschaft für Handchirurgie; Frankfurt am Main; Deutsche Gesellschaft für Handchirurgie; 2016
    Keywords Medizin, Gesundheit ; Dermisersatz ; Defektdeckung ; Hauttransplantation ; MatriDerm
    Publishing date 2016-09-20
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/16dgh112
    Database German Medical Science

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  7. Book ; Online: Die Entwicklung der Petroleumindustrie und des Petroleumhandels in Rumänien

    Stolz, C. Henry

    2017  

    Author's details Von C. Henry Stolz
    Keywords Dissertation ; Mineralöl ; Rumänien
    Language German
    Dates of publication 2017-1910
    Size 1 Online-Ressource (VII, 123 Seiten)
    Publisher ZBW
    Publishing place Kiel ; Hamburg
    Document type Book ; Online
    Database ECONomics Information System

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  8. Article: Dissociable feedback valence effects on frontal midline theta during reward gain versus threat avoidance learning

    Stolz, Christopher / Pickering, Alan D. / Mueller, Erik M.

    Psychophysiology

    2022  

    Abstract: While frontal midline theta (FM theta) has been associated with threat processing, with cognitive control in the context of anxiety, and with reinforcement learning, most reinforcement learning studies on FM theta have used reward rather than threat- ... ...

    Title translation Dissoziierbare Effekte der Feedback-Valenz auf das Theta der frontalen Mittellinie während des Lernens von Belohnungsgewinnen und der Vermeidung von Bedrohungen
    Abstract While frontal midline theta (FM theta) has been associated with threat processing, with cognitive control in the context of anxiety, and with reinforcement learning, most reinforcement learning studies on FM theta have used reward rather than threat-related stimuli as reinforcer. Accordingly, the role of FM theta in threat-related reinforcement learning is largely unknown. Here, n = 23 human participants underwent one reward-, and one punishment-, based reversal learning task, which differed only with regard to the kind of reinforcers that feedback was tied to (i.e., monetary gain vs. loud noise burst, respectively). In addition to single-trial EEG, we assessed single-trial feedback expectations based on both a reinforcement learning computational model and trial-by-trial subjective feedback expectation ratings. While participants' performance and feedback expectations were comparable between the reward and punishment tasks, FM theta was more reliably amplified to negative vs. positive feedback in the reward vs. punishment task. Regressions with feedback valence, computationally derived, and self-reported expectations as predictors and FM theta as criterion further revealed that trial-by-trial variations in FM theta specifically relate to reward-related feedback-valence and not to threat-related feedback or to violated expectations/prediction errors. These findings suggest that FM theta as measured in reinforcement learning tasks may be less sensitive to the processing of events with direct relevance for fear and anxiety.
    Keywords Belohnungslernen ; Bestrafung ; Biofeedback ; Cognitive Control ; Computational Modeling ; Computermodell ; Drohung ; Fear ; Furcht ; Kognitive Steuerung ; Prediction Errors ; Punishment ; Reinforcement ; Reward Learning ; Theta Rhythm ; Theta-Rhythmus ; Threat ; Verstärkung ; Vorhersagefehler
    Language English
    Document type Article
    ZDB-ID 209486-1
    ISSN 1540-5958 ; 0048-5772
    ISSN (online) 1540-5958
    ISSN 0048-5772
    DOI 10.1111/psyp.14235
    Database PSYNDEX

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 502: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  9. Book ; Online: Depth-Adapted CNNs for RGB-D Semantic Segmentation

    Wu, Zongwei / Allibert, Guillaume / Stolz, Christophe / Ma, Chao / Demonceaux, Cédric

    2022  

    Abstract: Recent RGB-D semantic segmentation has motivated research interest thanks to the accessibility of complementary modalities from the input side. Existing works often adopt a two-stream architecture that processes photometric and geometric information in ... ...

    Abstract Recent RGB-D semantic segmentation has motivated research interest thanks to the accessibility of complementary modalities from the input side. Existing works often adopt a two-stream architecture that processes photometric and geometric information in parallel, with few methods explicitly leveraging the contribution of depth cues to adjust the sampling position on RGB images. In this paper, we propose a novel framework to incorporate the depth information in the RGB convolutional neural network (CNN), termed Z-ACN (Depth-Adapted CNN). Specifically, our Z-ACN generates a 2D depth-adapted offset which is fully constrained by low-level features to guide the feature extraction on RGB images. With the generated offset, we introduce two intuitive and effective operations to replace basic CNN operators: depth-adapted convolution and depth-adapted average pooling. Extensive experiments on both indoor and outdoor semantic segmentation tasks demonstrate the effectiveness of our approach.
    Keywords Computer Science - Computer Vision and Pattern Recognition
    Subject code 004
    Publishing date 2022-06-08
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Threat-conditioned contexts modulate the late positive potential to faces-A mobile EEG/virtual reality study.

    Stolz, Christopher / Endres, Dominik / Mueller, Erik M

    Psychophysiology

    2018  Volume 56, Issue 4, Page(s) e13308

    Abstract: In everyday life, the motivational value of faces is bound to the contexts in which faces are perceived. Electrophysiological studies have demonstrated that inherent negatively valent contexts modulate cortical face processing as assessed with ERP ... ...

    Abstract In everyday life, the motivational value of faces is bound to the contexts in which faces are perceived. Electrophysiological studies have demonstrated that inherent negatively valent contexts modulate cortical face processing as assessed with ERP components. However, it is not well understood whether learned (rather than inherent) and three-dimensional aversive contexts similarly modulate the neural processing of faces. Using full immersive virtual reality (VR) and mobile EEG techniques, 25 participants underwent a differential fear conditioning paradigm, in which one virtual room was paired with an aversive noise burst (threat context) and another with a nonaversive noise burst (safe context). Subsequently, avatars with neutral or angry facial expressions were presented in the threat and safe contexts while EEG was recorded. Analysis of the late positive potential (LPP), which presumably indicates motivational salience, revealed a significant interaction of context (threat vs. safe) and face type (neutral vs. angry). Neutral faces evoked increased LPP amplitudes in threat versus safe contexts, while angry faces evoked increased early LPP amplitudes regardless of context. In addition to indicating that threat-conditioned contexts alter the processing of ambiguous faces, the present study demonstrates the successful integration of EEG and VR with particular relevance for affective neuroscience research.
    MeSH term(s) Adult ; Cerebral Cortex/physiology ; Conditioning, Classical/physiology ; Electroencephalography ; Evoked Potentials/physiology ; Facial Expression ; Facial Recognition/physiology ; Fear/physiology ; Female ; Humans ; Male ; Social Perception ; Virtual Reality ; Young Adult
    Language English
    Publishing date 2018-12-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209486-1
    ISSN 1540-5958 ; 0048-5772
    ISSN (online) 1540-5958
    ISSN 0048-5772
    DOI 10.1111/psyp.13308
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 502: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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