Abstract
The objective of this research was to study the therapeutic effects of repetitive transcranial magnetic stimulation (rTMS) on corticospinal tract (CST) activities, reflex hyper-excitability, muscle stiffness, and the clinical status of children with spastic hemiplegic cerebral palsy (CP). Three children participated in this study. The treatment lasted for 6 weeks. Two of the patients, the experimental group, received rTMS therapy 4 days a week during the first 3 weeks, and then received typical occupational therapy (OT) after each rTMS session during the second 3 weeks. One patient, the control group, received the same treatment except that a sham coil was used. Each rTMS session lasted for 20 minutes and each OT session lasted for 45 minutes. We evaluated CST activities by transcranial magnetic stimulation (TMS), reflex hyperexcitability by H-reflex response, and muscle stiffness by sonoelastography images. The tests were taken before and after the treatment. Major TMS parameters (i.e., motor evoked potential (MEP) latency, MEP p-p amplitude, cortical silent period (cSP), and intensity of pulse) for experimental patients were improved in comparison with the control patient. H response latency and max H response on max M-wave (H/M) were improved for the experimental group compared to the control group. Two parameters of texture analysis of the sonoelastography images (i.e., entropy and contrast) were improved for the experimental group. Clinical evaluations such as 10 meter walk test (10MWT), timed up and go (TUG), and 6 minute walk test (6MWT) were performed before and after the course of treatment and were improved for the experimental group compared to the control group. These results indicated that rTMS therapy can improve CST activities, reflexes, muscle stiffness, and walking capacity of spastic hemiplegic CP. Therefore, it can be considered as an effective therapeutic tool for enhancing neuromuscular abnormalities resulting from CP.
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