20 minutes of transcranial direct current stimulation along with the application of motor imagery and action observation

A placebo intervention of direct transcranial stimulation being active during 15 seconds and then it will be turned off the rest of the time until 20 minutes. This group will also carry out the training of action observation and motor imagery.

This group will act as a control, they will only carry out the training of action observation and motor imagery.

This group will carry out an observation training of actions and motor imagery in combination with the stimulation of the transcranial direct current.

Pressure pain threshold has been defined as the minimal amount of pressure at which a sense of pressure first changes to pain or discomfort

The ability to generate motor images will be measured through The movement imagery questionnaire-revised (MIQ-R) is an 8-item self-report inventory that was used to assess visual and kinesthetic motor imagery ability. Four different movements are included in the MIQ-R, which is comprised of 4 visual and 4 kinesthetic items. For each item, participants read a description of the movement. They then physically performed the movement and were instructed to reassume the starting position after finishing the movement and before performing the mental task, imagining the movement visually or kinesthetically. Each participant then rated the ease or difficulty of mentally generating that image on a 7-point scale, in which 7 indicates "very easy to see/feel" and 1 "very difficult to see/feel." The internal consistencies of the MIQ-R have been consistently adequate.