Inclusion Criteria:  Men and women between 18 and 35 years of age. Normal or corrected vision specifying the method of correction. Normal or corrected hearing specifying method of correction. Unfamiliar with the assessment and uses of motor imagery. Presence of State-Trait Anxiety Inventory scores corresponding to anxiety.  Exclusion Criteria:  Subjects who have suffered fractures, dislocations, or traumatic processes in any segment of the non-dominant upper limb or fingers, wrist, or elbow of the dominant upper limb in the last 6 months. Subjects with learning disabilities or problems in reading or writing. Subjects with a history of any neurological disease, cardiovascular disease, myopathic disease, epileptic seizure, absence seizure, sleep apnoea, chronic fatigue syndrome, or fibromyalgia. Taking any medication to suppress anxiety, to sleep, antidepressants, antihistamines, muscle relaxants, psychotropic, or other medications that interfere with the nervous system. Intake of nervous system depressants or stimulants such as caffeine or theine in the last 8 hours. Presence of localised skin lesion or disease in the wrist area.