Repetitive Transcranial Magnetic Stimulation and the Development of Ongoing Muscle Pain

Muscle soreness

7-point Likert scale; 0 = 'a complete absence of soreness', 1 = 'a light soreness in the muscle felt only when touched/vague ache', 2 = 'a moderate soreness felt only when touched/a slight persistent ache', '3 = 'a light muscle soreness when lifting or carrying objects', 4 = 'a light muscle soreness, stiffness or weakness when moving the wrist without gripping an object', 5 = 'a moderate muscle soreness, stiffness or weakness when moving the wrist', 6 = 'a severe muscle soreness, stiffness or weakness that limits the ability to move'

Time frame: Change from baseline at 2 weeks

Patient-rated Tennis Elbow Evaluation

The Patient-rated Tennis Elbow Evaluation will be used to assess average pain and disability of the injected arm

Time frame: Change from baseline at 2 weeks

Attention network test

This task assesses cognitive function in 3 domains: alerting, orienting, and executive function

Time frame: Change from baseline at 2 weeks

Pressure pain thresholds

Pressure applied to the surface of the skin using a handheld algometer.

Time frame: Change from baseline at 2 weeks

Cuff pressure algometry

The experimental setup consists of a tourniquet cuff, a computer-controlled air compressor and an electronic visual analog scale VAS (Aalborg University, Denmark). The cuff is connected to the compressor and wrapped around the leg. The pain intensity is recorded with the electronic VAS and sampled at 10 Hz. The "0 cm" and "10 cm" extremes on the VAS are defined as "no pain" and as "maximal pain", respectively. The compression rate of the cuff is programmed on and controlled by a computer.