The purpose of this study is to investigate if different emotional states could influence mechanical pain thresholds and other pain - related variables such as pain tolerance, pain intensity and pain - related negative affect in individuals with chronic pain.
Above 18 years of age
Fluent in Swedish
Persistent chronic pain with duration > 6 months
None
Parallel
Emotional intervention
Other interventionEmotional intervention Description: The participant will watch a short video-clip with negative emotional content while simultaneously experience experimentally induced pain.
Emotional intervention
Other interventionDescription: The participant will watch a short video-clip with positive emotional content while simultaneously experience experimentally induced pain.
Emotional intervention
Other interventionDescription: The participant will watch a short video-clip with neutral emotional content while simultaneously experience experimentally induced pain.
Pressure pain thresholds
Description: Pressure pain thresholds will be measured i kPa with a handheld algometer (Somedic AB).
Pain tolerance (time in seconds the left hand is immersed in cold water 1 degree C).
Description: The measure pain tolerance equals the time the time the participant keeps their left hand immersed in cold water (1 degree C), before they decide to withdraw their hand. This will be measured in seconds. For each participant, the maximum time to keep the hand immersed in water is 300 seconds. Participants are successively recruited for single appointments for 4 months.
Pain intensity on the NRS
Participants will rate their perceived pain intensity on the NRS (Numerical Rating Scale) after the intervention (film-clip combined with pain induction using the cold pressor apparatus with cold water 1 degree C. This will take place on a single session appointment for each participant. Participants will be successively recruited for single session appointments for 4 months.
Pain-related negative affect on the NRS-A
Description: Perceived pain-related negative affect will be estimated on the NRS-A (Numerical Rating Scale- Anxiety) after the intervention (film-clip combined with pain induction with the cold pressor apparatus with cold water 1 degree C).The pain intensity will be estimated at every single session appointment (30 min) after the intervention on the NRS (Numerical Rating Scale). The participants will be successively recruited for single session appointments for 4 months.
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