Effects of Mental Practice on Manual Gripping Motor Function

Study Overview
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Brief Summary
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The main objective is to evaluate and quantify the manual gripping force caused by mental practice

Official Title
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Effects of Mental Practice on Manual Gripping Motor Function: A Randomized Controlled Trial

Conditions
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Hand Grasp

Intervention / Treatment
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* Behavioral: Motor imagery
* Behavioral: Placebo intervention


Participation Criteria
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Eligibility Criteria
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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.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Mental practice<br> | Behavioral: Motor imagery<br>* The person will have to imagine different scenarios of manual gripping<br>|
| Placebo Comparator: Placebo group<br> | Behavioral: Placebo intervention<br>* The placebo group will imagine a place without the presence of humans.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Hand grip strength | It is a variable of gripping force measured in the unit of Newtons | Change from baseline and immediately post-intervention | 
| 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 | Change from baseline and immediately post-intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Visual and Kinesthetic Motor Imagery Ability | Visual and Kinesthetic Motor Imagery Ability will be measured with Movement Imagery Questionnaire-Revised (MIQ-R). MIQ-R has four movements repeated in two subscales, a visual and a kinesthetic one. Additionally, a score between 1 and 7 is assigned, with 1 representing difficulty in picturing the motor image or difficulty in feeling the movement previously made, and 7 representing the maximum ease. The internal consistencies of the MIQ-R have been consistently adequate with Cronbach's α coefficients ranging above 0.84 for the total scale, 0.80 for de visual subscale and 0.84 for the kinesthetic subscale. | Immediately before the intervention | 
| The degree of physical activity | The degree of physical activity was objectified through the The International Physical Activity Questionnaire (IPAQ) questionnaire, which allows the subjects to be divided into three groups according to their level of activity, which can be high, moderate, and low or inactive. The IPAQ consists of 7 questions about the frequency, duration and intensity of activity (moderate and intense) performed in the last seven days, as well as walking and sitting time on a workday. The IPAQ scoring protocol assigns the following MET values to walking, moderate, and vigorous intensity activity: 3.3 METs, 4.0 METs, and 8.0 METs, respectively. | Immediately before the intervention. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Motor imagery