Pain Inhibitory Effects of a Single Painful Mechanical Stimulus Compared to Multiple and Multiple at Different Locations
- Conditions
- Healthy
- Interventions
- Other: Mechanical Conditioning stimulus
- Registration Number
- NCT05730179
- Lead Sponsor
- Josue Fernandez Carnero
- Brief Summary
The objective is to estimate the effects on pain thresholds of a single painful mechanical stimulus compared to multiple and multiple stimuli at different locations.
- Detailed Description
The mechanical stimulus produced in manual therapy (MT) techniques elicits neurophysiological responses within the peripheral and central nervous system responsible for pain inhibition. Almost all types of MT elicit a neurophysiological response that is associated with the descending pain modulation circuit. But it has not been demonstrated whether this inhibition occurs through a conditioned pain modulation mechanism induced by painful mechanical stimulation that is carried out with manual therapy techniques.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 24
- healthy male or female between 18 and 65 years
- Free of pain and with no history of chronic pain
- Pregnant or having given birth within the last year
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- CROSSOVER
- Arm && Interventions
Group Intervention Description Repeated mechanical stimulation at different locations Mechanical Conditioning stimulus Mechanical compression is applied with the thumb. The intensity of this will be regulated by the pain it causes the patient, trying to ensure that it is at all times approximately 2/10 on the numerical pain rating scale (NPRS) with 0 being "no pain at all" and 10 being "the worst pain imaginable". Stimulation will be performed for 2 minutes, 4 times, at four different sites (left and right upper trapezius and left and right lumbar paravertebral) with 1 minute of rest. Mechanical stimulation Mechanical Conditioning stimulus Mechanical compression is applied with the thumb to the upper trapezius muscle on the non-dominant side at the midpoint between the acromion and C7. The intensity of this will be regulated by the pain it causes the patient, trying to ensure that it is at all times approximately 5/10 on the numerical pain rating scale (NPRS) with 0 being "no pain at all" and 10 being "the worst pain imaginable". The stimulation will be carried out for 2 minutes. Repeated mechanical stimulation Mechanical Conditioning stimulus Mechanical compression is applied with the thumb to the upper trapezius muscle on the non-dominant side at the midpoint between the acromion and C7. The intensity of this will be regulated by the pain it causes the patient, trying to ensure that it is at all times approximately 2/10 on the numerical pain rating scale (NPRS) with 0 being "no pain at all" and 10 being "the worst pain imaginable". The stimulation will be performed for 2 minutes 4 times with 1 minute rest.
- Primary Outcome Measures
Name Time Method Change from Baseline in Tibialis Anterior Pressure Pain Threshold (PPT) to immediate post-conditioning stimulus At baseline and immediately after the conditioning stimulus PPTs will be assessed on the dominant side over the tibialis anterior muscle using a digital algometer (Wagner instruments, Greenwich, CT, USA). Participants will be instructed to say "stop" when the pressure sensation becomes painful. The average of 3 assessments on the tibialis anterior of the dominant side will be performed for analysis. The algometer pressure for assessment will be gradually increased at a rate of 1kg/second. Data will be collected in kg/cm2.
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Universidad Rey Juan Carlos
🇪🇸Alcorcón, Madrid, Spain