Effects of Expectations on Hypoalgesia Produced by Mental Practice

Universidad Autonoma de Madrid90 enrolled

Overview

The main objective of this research work is to evaluate and quantify the hypoalgesia generated by motor imagery influenced by the presence of expectations.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

SINGLE

Enrollment

Conditions

Cognitive Change

Interventions

Positive Expectations (initial)BEHAVIORAL

A positive expectation of the effect of motor imagery will be given before beginning the mental practice of imagination. "This task will generate hypoalgesia"

Negative Expectations (initial)BEHAVIORAL

A negative expectation of the effect of motor imagery will be given before beginning the mental practice of imagination. "This task will not generate hypoalgesia"

Neutral Expectations (initial)BEHAVIORAL

This group will act as a control. No expectations will be given that will influence the participant.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Age between 18 and 60 * Healthy and with no pain subjects Exclusion Criteria: * Any cognitive impairment that hindered viewing of audiovisual material. * Difficulty understanding or communicating. * Presence of systemic pathology, Central Nervous System or rheumatic disease. * Inadequate understanding of the Spanish language to follow instructions for measuring and treatment. * Collaboration of pregnant women. * Underage subjects * Subjects with pain at the time of the study.

Locations (1)

CSEU La Salle

Madrid, Spain

Outcomes

Primary Outcomes

Pain pressure threshold

Pressure Pain Threshold (PPT) is one of these tests and it is defined as the minimum force applied which induces pain. The measurement shall be carried out by using an algometer (pressure device that induces mechanical stimuli) is to standardize the amount of pressure applied in the neck region. The reliability of pressure pain thresholds according to raters or measurement frequencies is relatively high.

Time frame: Change from baseline and immediately post-intervention

Thermal threshold

This variable will evaluate three aspects. Cold detection threshold, heat detection threshold and heat pain threshold. A specialized and validated instrument is used which consists of a sensor with a resistance that raises and lowers the temperature in a controlled way between 20 and 50ºC.

Time frame: Change from baseline and immediately post-intervention

Heart Rate

Heart Rate will be measured by three electrodes located in the left area of the chest. One of the electrodes is placed in the middle zone while a second electrode is positioned on the lateral side, and a third one on the lower left side, below the first electrode.

Time frame: Change from baseline and immediately post-intervention

Data from ClinicalTrials.gov

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