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Publication
Construção da memória de dor: Influência das características psicológicas e do efeito placebo na memória de dor numa população não clínica
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Advisor(s)
Abstract(s)
As experiências de dor são subjetivas e complexas. Apesar de frequentemente
resultarem em memórias duradouras, o conhecimento científico atual sobre a forma como
essas memórias de dor são construídas e moduladas por processos psicológicos é ainda
limitado. O presente estudo teve como objetivo investigar se características psicológicas
e a vulnerabilidade ao efeito placebo estão relacionadas com a recordação de um episódio
de dor, induzido no laboratório em população jovem não clínica. Na sessão de laboratório
os participantes preencheram questionários que mediram características psicológicas:
Pain Catastrophizing Scale (PCS), Life Orientation Test (LOT), Multidimensional
Assessement of Interoceptive Awarness (MAIA), Hospital Anxiety and Depression Scale
(HADS), State-Trait Anxiety Inventory Form Y-1 (STAI Y-1), State-Trait Anxiety
Inventory Form Y-2 (STAI Y-2). De seguida, foram sujeitos a uma tarefa de manipulação
do placebo com estímulos térmicos de intensidade variável, avaliados através da Escala
Visual Analógica (VAS) da Dor. Duas semanas depois foram contactados por email para
recordarem a dor máxima sentida na sessão de laboratório. Foram recrutados 29
participantes. Os resultados demonstraram que recordavam a máxima dor sentida como
significativamente menos intensa do que tinham reportado no momento no laboratório.
Os participantes com níveis de ansiedade mais elevados apresentavam maior
sensibilidade à dor e vulnerabilidade ao placebo, mas não se verificaram correlações entre
a as características avaliadas, a sensibilidade ao placebo e a memória de dor. Estes
resultados sugerem a necessidade de desenvolver mais estudos para identificar quais os
fatores que influenciam a construção e recordação das memórias das experiências de dor.
ABSTRACT: Pain experiments are subjective and complex. Despite of frequently resulting in long lasting memories, current scientific knowledge about how these pain memories are constructed and modulated by psychologic processes is still limited. The present study aimed to investigate if psychologic characteristics and placebo effect vulnerability are related with recalling a pain episode, induced in the laboratory in non-clinic youth population. In the laboratory session, the participants filled out questionnaires that evaluate psychological characteristics: Pain Catastrophizing Scale (PCS), Life Orientation Test (LOT), Multidimensional Assessement of Interoceptive Awarness (MAIA), Hospital Anxiety and Depression Scale (HADS), State-Trait Anxiety Inventory Form Y-1 (STAI Y-1), State-Trait Anxiety Inventory Form Y-2 (STAI Y-2). Then they were subjected to a placebo manipulation task with thermal stimuli of variable intensity assessed using the Visual Analogue Scale (VAS). Two weeks later they were contacted by email to remember the maximum pain felt in the lab session. 29 participants were recruited. Results demonstrated that they recalled the maximum pain felt as significantly less intense than they had reported at the time in the laboratory. Participants with higher levels of anxiety had greater sensitivity to placebo pain and vulnerability, but there were no correlations between the assessed characteristics, placebo sensitivity and pain memory. These results suggest the need to develop further studies to identify which factors influence the construction and recall of the memories of pain experiments.
ABSTRACT: Pain experiments are subjective and complex. Despite of frequently resulting in long lasting memories, current scientific knowledge about how these pain memories are constructed and modulated by psychologic processes is still limited. The present study aimed to investigate if psychologic characteristics and placebo effect vulnerability are related with recalling a pain episode, induced in the laboratory in non-clinic youth population. In the laboratory session, the participants filled out questionnaires that evaluate psychological characteristics: Pain Catastrophizing Scale (PCS), Life Orientation Test (LOT), Multidimensional Assessement of Interoceptive Awarness (MAIA), Hospital Anxiety and Depression Scale (HADS), State-Trait Anxiety Inventory Form Y-1 (STAI Y-1), State-Trait Anxiety Inventory Form Y-2 (STAI Y-2). Then they were subjected to a placebo manipulation task with thermal stimuli of variable intensity assessed using the Visual Analogue Scale (VAS). Two weeks later they were contacted by email to remember the maximum pain felt in the lab session. 29 participants were recruited. Results demonstrated that they recalled the maximum pain felt as significantly less intense than they had reported at the time in the laboratory. Participants with higher levels of anxiety had greater sensitivity to placebo pain and vulnerability, but there were no correlations between the assessed characteristics, placebo sensitivity and pain memory. These results suggest the need to develop further studies to identify which factors influence the construction and recall of the memories of pain experiments.
Description
Dissertação de Mestrado apresentada
no ISPA – Instituto Universitário
para obtenção de grau de Mestre na
especialidade de Psicóloga Clínica.
Keywords
Dor Efeito placebo Condicionamento Expectativas Características psicológicas Tarefa de manipulação do placebo Pain Placebo effect Conditioning Expectations Psychological characteristics Placebo manipulation task