About this trial
The goal of this clinical trial is to learn if laterality training (a type of brain-based therapy) can help reduce pain and change how people with chronic musculoskeletal pain experience and describe their pain. The study will focus on adults with shoulder or knee pain lasting longer than 6 months.
The main questions it aims to answer are:
Does laterality training lead to a reduction in self-reported pain levels?
Does laterality training reduce the area of the body that participants indicate as painful in their pain drawings?
Does laterality training improve accuracy and speed in left/right judgment tasks?
Researchers will compare participants who complete laterality training to those who complete a non-therapeutic cognitive task (a word puzzle) to see if laterality training changes pain drawings and improves pain outcomes.
Participants will:
Complete a pre-intervention assessment including pain ratings, pain drawings, and a left/right judgment test
Be randomly assigned to one of two groups:
Intervention group: Complete 5 one-minute sessions of laterality training using a tablet-based app called Recognise™, identifying left or right hand/foot images depending on the location of their pain
Control group: Complete a 10-minute crossword puzzle activity (non-therapeutic)
Complete the same assessments after the activity (pain ratings, pain drawings, left/right judgment test)
The study will take place at two outpatient physical therapy clinics. Participation involves a single session lasting approximately 30-45 minutes. There is no cost to participate, and no compensation is provided. Participation is voluntary, and all personal data will be kept confidential.
This research will help determine whether laterality training, a non-invasive brain-based technique, can reduce pain and improve quality of life in people with long-standing musculoskeletal pain.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Adults aged 18 years or older
Diagnosis of chronic shoulder or knee pain lasting more than 6 months
Able to read and understand English
Willing to provide written informed consent
Disqualifiers
Visual impairments that would interfere with laterality training (e.g., blindness or significant difficulty with vision)
Previous participation in laterality (left/right discrimination) training
Unwilling or unable to participate in the study procedures
Trial design
Parallel
Treatments tested in this trial
Laterality Training
BehavioralParticipants complete a structured laterality training session using a tablet-based application that presents images of hands or feet. Depending on their pain location (shoulder or knee), participants identify whether each image shows a left or right body part. The session consists of 5 one-minute training bouts with 60-second rest intervals between each. The task is designed to engage and retrain cortical body maps associated with the painful region, based on principles of graded motor imagery. Participants are instructed to prioritize accuracy over speed.
Sham (No Treatment)
Other interventionParticipants in this arm will complete a non-therapeutic cognitive activity by working independently on a standard word-based crossword puzzle for 10 minutes. This task is designed to match the duration and engagement level of the laterality training without influencing sensorimotor processing or cortical body maps. It serves as a sham comparator to help isolate the specific effects of the laterality training intervention.
Treatment groups
Trial outcomes
Primary outcomes
Change in Pain Drawing Area
Measured using a standardized body chart with a grid overlay. Participants mark areas of perceived pain, and the total number of grid squares marked is quantified to assess changes in spatial pain representation.
Secondary outcomes
Change in Left/Right Judgment Accuracy and Reaction Time
Assessed using the Recognise™ app. Participants complete two 60-second tests identifying left/right images of hands (shoulder pain) or feet (knee pain). Accuracy (%) and average response time (seconds per image) are recorded.
Change in Numeric Pain Rating Scale (NPRS)
Self-reported pain intensity measured using an 11-point numeric scale (0 = no pain, 10 = worst imaginable pain). This outcome assesses the immediate change in pain before and after the intervention.
Sponsors and contacts
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Hawaii Pacific University
Lead sponsor
Therapeutic Neuroscience Research Group
Collaborator
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