Expectations

The goal of this clinical trial is to learn whether non-invasive brain stimulation, called transcranial temporal interference stimulation (tTIS), can reduce negative affect, and how expectations shaped by care providers influence these effects. The main questions this study aims to answer are: (1)Does active tTIS reduce negative affect more effectively than sham (inactive) tTIS? (2)Do positive treatment expectations enhance the effects compared to negative expectations? Participants will: (1) Receive either active or sham tTIS. (2) Be provided with positive or negative messaging regarding treatment effectiveness. (3) Interact with care providers and complete assessments measuring negative affect and physiological responses.

Postpartum Depression (PPD) is defined as the development of depression at any time during the first year after childbirth¹. Its prevalence ranges from 15% to 20%. It can manifest with symptoms such as depressed mood, loss of interest and energy, insomnia, anxiety, and may even lead to suicidal ideation. The consequences are numerous, both physical and psychological, with long-term repercussions on the mother-infant bond, family dysfunction, and the development of emotional and cognitive disorders in children. The etiology of PPD is multifactorial, but numerous recent studies have focused on the role of labor pain and its management with labor analgesia techniques. The aim of the present study is therefore to assess whether there is a difference in the incidence of PPD between parturients whose expectations regarding labor analgesia were met ('expectations met' group) versus those whose expectations were unmet.

With this study the investigators want to perform a prospective observational cohort study at Zealand University Hospital, Koege, Denmark. The purpose of this study is twofold: 1. to investigate how expectations predict patients' pain, rehabilitation and quality of life after spinal surgery. 2. to explore the patients' expectations before, and their experiences after, spinal surgery regarding pain, rehabilitation and quality of life.