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Guilherme Messas

Biographic Data

ID3463853
NAMEGuilherme Messas
GIVEN NAMESGuilherme
FAMILY NAMEMessas
SIGNATUREMESSAS G
AFFILIATIONSFaculdade de Ciências Médicas da Santa Casa de São Paulo
ORCID0000-0002-8985-2300
VERIFIEDYes
TOTAL WORKS15
TOTAL CITATIONS1
AUTHOR COUNT15
EDITOR COUNT0
FIRST PUBLICATION YEAR2008
LATEST PUBLICATION YEAR2026
H-INDEX1
  • Back to Karl Jaspers’ incomprehensibility of schizophrenia: A longitudinal approach

    Open Access•Valter L Piedade, Guilherme Messas•ARTICLE•History of Psychiatry•2026

    Schizophrenia has remained from its conception one of psychopathology’s most debated topics. Karl Jaspers’ theorem of its “incomprehensibility” has been particularly influential, often reduced to the impossibility of empathic understanding within the clinical encounter. Contemporary critiques, however, frequently misinterpret Jaspers’ phenomenological framework, overlooking the broader scope of its thought. This paper proposes a reinterpretation …

  • Towards a phenomenological approach to psychopharmacology: Drug-centered model and epistemic empowerment

    Open Access•Marcelo Vieira Lopes, Guilherme Messas•ARTICLE•Phenomenology and the Cognitive…•2025

  • Psychotherapy of the oppressed: The education of Paulo Freire in dialogue with phenomenology

    Valter L Piedade, Guilherme Messas•ARTICLE•Philosophical Psychology•2025

    The current paradigm of mental health has fallen short in its promises to deliver better care and quality of life for those who lives with mental illness. Recent works have expressed the need for more comprehensive frameworks of research, in which phenomenology emerges as a fundamental tool for a new wave interdisciplinary studies with the humanities. In line with this project, this article hopes to explore the relation between education and phen…

  • Contextualising mental health: Interdisciplinary contributions to a new model for tackling social differences and inequalities in mental healthcare

    Open Access•Roxana Baiasu, Guilherme Messas•ARTICLE•Philosophical Psychology•2025

    Many classical approaches in the area of phenomenological pscyhopathology focus on structures of lived experience of mental illness and overlook the role social context plays in the formation of lived experiences. The paper addresses this issue and contributes to recent research which has pointed out that there is a need for an approach to mental health which investigates the role of context in shaping lived experiences. We propose a conception o…

  • The Unrealized Potential of Phenomenology in Understanding Addiction A Critical Exploration

    Georgios Petropoulos, Ion Copoeru et al.•ARTICLE•Philosophy, psychiatry & psychology•2025

    This paper seeks to make a contribution to addiction research by introducing some key phenomenological concepts and discussing how they can illuminate the lived experience of people with addiction. We begin by briefly sketching the historical and philosophical background of phenomenology, highlighting its focus on subjective experience and its clinical relevance. In the second part of the paper we introduce some fundamental aspects of lived exper…

  • Renewing Psychopharmacology: Elements for a Phenomenological Research Program

    Open Access•Luca Fasciolo Maschião, Guilherme Messas•ARTICLE•Journal of Humanistic Psychology•2025•References: 74

    Psychopharmacological research has a recent history, but changes in its scope and method brought about an estrangement from the lived experience of substance use. In this article, we briefly overview these historical trends and point out some of its consequences, emphasizing their relationship to contemporary conundrums in the field of psychopharmacology. We then propose elements for a research program in phenomenological psychopharmacology, defi…

  • Dialectics of addiction: A psychopathologically-enriched comprehension of the clinical care of the addicted person

    Open Access•Guilherme Messas, Susana Dörr-Álamos•ARTICLE•Phenomenology and the Cognitive…•2024

  • Entrevista com o psiquiatra Guilherme Messas

    Guilherme Messas•ARTICLE•MEDICA REVIEW International…•2022

  • Recontextualizing the subject of phenomenological psychopathology: Establishing a new paradigm case

    Open Access•Guilherme Messas, Anthony Vincent Fernandez•ARTICLE•Frontiers in Psychiatry•2022

    Recently, there have been calls to develop a more contextual approach to phenomenological psychopathology-an approach that attends to the socio-cultural as well as personal and biographical factors that shape experiences of mental illness. In this Perspective article, we argue that to develop this contextual approach, phenomenological psychopathology should adopt a new paradigm case. For decades, schizophrenia has served as the paradigmatic examp…

  • The Dialectics of Altered Experience: How to Validly Construct a Phenomenologically Based Diagnosis in Psychiatry

    Open Access•Guilherme Messas, Lívia Emy Fukuda et al.•ARTICLE•Frontiers in Psychiatry•2022

    In this paper, we present how a dialectical perspective on phenomenological psychopathology, called Dialectical Phenomenology (DPh), can contribute to current needs of psychiatric diagnosis. We propose a three-stage diagnostic methodology: first- and second-person stages, and synthetic hermeneutics stage. The first two stages are divided into a pre-dialectical and a dialectical phase. The diagnostic process progresses in a trajectory of increasin…

  • A values-based phenomenology for substance use disorder: A new approach for clinical decision-making

    Open Access•Guilherme Messas, K W M Fulford•ARTICLE•Estudos de Psicologia (Campinas)•2021

    Phenomenological psychopathology has been defined as a human science that is concerned with the object on which clinical psychology and psychiatry act. How psychopathological experiences are understood is an important factor determining decision-making in clinical care. An accurate understanding of psychopathology is fundamental to the effectiveness of mental health treatments. This is even more important in a field such as substance use disorder…

  • Análise Fenômeno-estrutural da Temporalidade no Primeiro ano de Vida

    Open Access•Daniela Ceron-Litvoc, Daniela Ceron‐Litvoc et al.•ARTICLE•Revista Subjetividades•2019

    Este artigo apresenta uma proposta fenomenológica estrutural de psicologia do desenvolvimento dos primeiros 12 meses de vida. A literatura clássica fenomenológica fomenta, nesse artigo, um aprofundamento da compreensão antropológica piagetiana do desenvolvimento. As descrições minuciosas de Jean Piaget do desenvolvimento de seus três filhos foram utilizadas como paradigma para a apresentação de uma proposta de como a temporalidade se apresenta no…

  • New Perspectives in Phenomenological Psychopathology: Its Use in Psychiatric Treatment

    Open Access•Guilherme Messas, Melissa Garcia Tamelini et al.•ARTICLE•Frontiers in Psychiatry•2018

    Phenomenological psychopathology is a body of scientific knowledge on which the clinical practice of psychiatry is based since the first decades of the twentieth century, a method to assess the patient's abnormal experiences from their own perspective, and more importantly, a science responsible for delimiting the object of psychiatry. Recently, the frontiers of phenomenological psychopathology have expanded to the productive development of thera…

  • A meta-analysis of the core essence of psychopathological entities: An historical exercise in phenomenological psychiatry

    Open Access•Guilherme Messas, Melissa Garcia Tamelini et al.•ARTICLE•History of Psychiatry•2017

    Two fundamentally different approaches among phenomenological psychopathologists can be discerned. One is what we call fixed essentialism, where the pathognomonic element of, say, schizophrenia is conceived of as a single, enduring and intrinsically morbid way of grasping all entities in the world, including self and body. The other, which we call dialectical essentialism, accounts for the same manifestations of, say, schizophrenia, but through a…

  • O espírito das leis e as leis do espírito: A Evolução Do Pensamento Legislativo Brasileiro Em Saúde Mental

    Open Access•Guilherme Peres Messas, Guilherme Messas•ARTICLE•História Ciências Saúde-Manguinhos•2008•Cited by: 1•References: 3

    Examina a evolução das leis e normas da República brasileira relativas ao padecimento mental, demarcando três períodos. No período inicial (1890-1910), caracterizado pela introdução do tema da patologia mental no campo das preocupações do Estado, o interesse fundamental foi o reconhecimento e a preservação dos direitos dos portadores dessas patologias; nesse período, a alteração mental é entendida em termos de neuropatologia. No período de amplia…

  • O espírito das leis e as leis do espírito: A Evolução Do Pensamento Legislativo Brasileiro Em Saúde Mental

    Open Access•Guilherme Peres Messas, Guilherme Messas•ARTICLE•História Ciências Saúde-Manguinhos•2008•Cited by: 1•References: 3

    Examina a evolução das leis e normas da República brasileira relativas ao padecimento mental, demarcando três períodos. No período inicial (1890-1910), caracterizado pela introdução do tema da patologia mental no campo das preocupações do Estado, o interesse fundamental foi o reconhecimento e a preservação dos direitos dos portadores dessas patologias; nesse período, a alteração mental é entendida em termos de neuropatologia. No período de amplia…

  • O espírito das leis e as leis do espírito: A Evolução Do Pensamento Legislativo Brasileiro Em Saúde Mental

    Open Access•Guilherme Peres Messas, Guilherme Messas•ARTICLE•História Ciências Saúde-Manguinhos•2008•Cited by: 1•References: 3

    Examina a evolução das leis e normas da República brasileira relativas ao padecimento mental, demarcando três períodos. No período inicial (1890-1910), caracterizado pela introdução do tema da patologia mental no campo das preocupações do Estado, o interesse fundamental foi o reconhecimento e a preservação dos direitos dos portadores dessas patologias; nesse período, a alteração mental é entendida em termos de neuropatologia. No período de amplia…

  • A meta-analysis of the core essence of psychopathological entities: An historical exercise in phenomenological psychiatry

    Open Access•Guilherme Messas, Melissa Garcia Tamelini et al.•ARTICLE•History of Psychiatry•2017

    Two fundamentally different approaches among phenomenological psychopathologists can be discerned. One is what we call fixed essentialism, where the pathognomonic element of, say, schizophrenia is conceived of as a single, enduring and intrinsically morbid way of grasping all entities in the world, including self and body. The other, which we call dialectical essentialism, accounts for the same manifestations of, say, schizophrenia, but through a…

  • New Perspectives in Phenomenological Psychopathology: Its Use in Psychiatric Treatment

    Open Access•Guilherme Messas, Melissa Garcia Tamelini et al.•ARTICLE•Frontiers in Psychiatry•2018

    Phenomenological psychopathology is a body of scientific knowledge on which the clinical practice of psychiatry is based since the first decades of the twentieth century, a method to assess the patient's abnormal experiences from their own perspective, and more importantly, a science responsible for delimiting the object of psychiatry. Recently, the frontiers of phenomenological psychopathology have expanded to the productive development of thera…

  • Análise Fenômeno-estrutural da Temporalidade no Primeiro ano de Vida

    Open Access•Daniela Ceron-Litvoc, Daniela Ceron‐Litvoc et al.•ARTICLE•Revista Subjetividades•2019

    Este artigo apresenta uma proposta fenomenológica estrutural de psicologia do desenvolvimento dos primeiros 12 meses de vida. A literatura clássica fenomenológica fomenta, nesse artigo, um aprofundamento da compreensão antropológica piagetiana do desenvolvimento. As descrições minuciosas de Jean Piaget do desenvolvimento de seus três filhos foram utilizadas como paradigma para a apresentação de uma proposta de como a temporalidade se apresenta no…

  • A values-based phenomenology for substance use disorder: A new approach for clinical decision-making

    Open Access•Guilherme Messas, K W M Fulford•ARTICLE•Estudos de Psicologia (Campinas)•2021

    Phenomenological psychopathology has been defined as a human science that is concerned with the object on which clinical psychology and psychiatry act. How psychopathological experiences are understood is an important factor determining decision-making in clinical care. An accurate understanding of psychopathology is fundamental to the effectiveness of mental health treatments. This is even more important in a field such as substance use disorder…

  • Entrevista com o psiquiatra Guilherme Messas

    Guilherme Messas•ARTICLE•MEDICA REVIEW International…•2022

  • Recontextualizing the subject of phenomenological psychopathology: Establishing a new paradigm case

    Open Access•Guilherme Messas, Anthony Vincent Fernandez•ARTICLE•Frontiers in Psychiatry•2022

    Recently, there have been calls to develop a more contextual approach to phenomenological psychopathology-an approach that attends to the socio-cultural as well as personal and biographical factors that shape experiences of mental illness. In this Perspective article, we argue that to develop this contextual approach, phenomenological psychopathology should adopt a new paradigm case. For decades, schizophrenia has served as the paradigmatic examp…

  • The Dialectics of Altered Experience: How to Validly Construct a Phenomenologically Based Diagnosis in Psychiatry

    Open Access•Guilherme Messas, Lívia Emy Fukuda et al.•ARTICLE•Frontiers in Psychiatry•2022

    In this paper, we present how a dialectical perspective on phenomenological psychopathology, called Dialectical Phenomenology (DPh), can contribute to current needs of psychiatric diagnosis. We propose a three-stage diagnostic methodology: first- and second-person stages, and synthetic hermeneutics stage. The first two stages are divided into a pre-dialectical and a dialectical phase. The diagnostic process progresses in a trajectory of increasin…

  • Dialectics of addiction: A psychopathologically-enriched comprehension of the clinical care of the addicted person

    Open Access•Guilherme Messas, Susana Dörr-Álamos•ARTICLE•Phenomenology and the Cognitive…•2024

  • Towards a phenomenological approach to psychopharmacology: Drug-centered model and epistemic empowerment

    Open Access•Marcelo Vieira Lopes, Guilherme Messas•ARTICLE•Phenomenology and the Cognitive…•2025

  • Psychotherapy of the oppressed: The education of Paulo Freire in dialogue with phenomenology

    Valter L Piedade, Guilherme Messas•ARTICLE•Philosophical Psychology•2025

    The current paradigm of mental health has fallen short in its promises to deliver better care and quality of life for those who lives with mental illness. Recent works have expressed the need for more comprehensive frameworks of research, in which phenomenology emerges as a fundamental tool for a new wave interdisciplinary studies with the humanities. In line with this project, this article hopes to explore the relation between education and phen…

  • Contextualising mental health: Interdisciplinary contributions to a new model for tackling social differences and inequalities in mental healthcare

    Open Access•Roxana Baiasu, Guilherme Messas•ARTICLE•Philosophical Psychology•2025

    Many classical approaches in the area of phenomenological pscyhopathology focus on structures of lived experience of mental illness and overlook the role social context plays in the formation of lived experiences. The paper addresses this issue and contributes to recent research which has pointed out that there is a need for an approach to mental health which investigates the role of context in shaping lived experiences. We propose a conception o…

  • The Unrealized Potential of Phenomenology in Understanding Addiction A Critical Exploration

    Georgios Petropoulos, Ion Copoeru et al.•ARTICLE•Philosophy, psychiatry & psychology•2025

    This paper seeks to make a contribution to addiction research by introducing some key phenomenological concepts and discussing how they can illuminate the lived experience of people with addiction. We begin by briefly sketching the historical and philosophical background of phenomenology, highlighting its focus on subjective experience and its clinical relevance. In the second part of the paper we introduce some fundamental aspects of lived exper…

  • Renewing Psychopharmacology: Elements for a Phenomenological Research Program

    Open Access•Luca Fasciolo Maschião, Guilherme Messas•ARTICLE•Journal of Humanistic Psychology•2025•References: 74

    Psychopharmacological research has a recent history, but changes in its scope and method brought about an estrangement from the lived experience of substance use. In this article, we briefly overview these historical trends and point out some of its consequences, emphasizing their relationship to contemporary conundrums in the field of psychopharmacology. We then propose elements for a research program in phenomenological psychopharmacology, defi…

  • Back to Karl Jaspers’ incomprehensibility of schizophrenia: A longitudinal approach

    Open Access•Valter L Piedade, Guilherme Messas•ARTICLE•History of Psychiatry•2026

    Schizophrenia has remained from its conception one of psychopathology’s most debated topics. Karl Jaspers’ theorem of its “incomprehensibility” has been particularly influential, often reduced to the impossibility of empathic understanding within the clinical encounter. Contemporary critiques, however, frequently misinterpret Jaspers’ phenomenological framework, overlooking the broader scope of its thought. This paper proposes a reinterpretation …

Mental Health and Psychiatry (10 works) · Psychology (9 works) · Psychotherapist (8 works) · Epistemology (7 works) · Philosophy (7 works) · Psychiatry (6 works) · Schizophrenia research and treatment (6 works) · Psychopathology (5 works) · Dialectic (4 works) · Phenomenology (philosophy (4 works)

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