Duval, C.; Lafontaine, D.; Hebert, J.; Leroux, A.; Panisset, M.; Boucher, J.P.  Journal of Manipulative and Physiological Therapeutics  2002 Sep; 25(7): 455-64

ABSTRACT: OBJECTIVE: To quantify changes of evoked stretch responses(ESR) in the most rigid arm of patients with Parkinson’s disease (PD)after Trager therapy.

METHODS: Gentle rocking motion associated with this type of manual therapy was imparted to the upper limbs and body of 30patients for 20 minutes. A pretest and 2 post tests (at 1 and 11 minutes after the treatment, respectively) were performed, consisting of electromyographic(EMG) recordings of the flexor carpi radialis and extensor digitorum communiswhile the patient’s wrist was passively flexed and extended with an amplitude of 60 degrees and a frequency of 1 Hz. Patients received the treatment on the most rigid side of their bodies (ipsi-group) or on the contralateral side (contra-group). Half of patients in each group received the treatment while lying supine on a massage table (ipsi- and contra-supine) or sitting in a chair (ipsi- and contra-sitting).

RESULTS: In general, the level of ESR reduced by 36% immediately after treatment and remained 32% lower than pretest values 11 minutes after treatment (F = 41.45, P <.05). Patients who received the treatment lying supine benefited from a 42% reduction of ESR (F = 4.07, P <.05). The side on which the treatment was performed did not significantly influence the outcome of the treatment (F = 0.50,P>.05). However, post hoc analysis of the triple interaction (test sidex position) indicated that the sitting position was much less efficient for sustained contralateral effect (P >.05).

CONCLUSIONS: Results from the present study strongly suggest that it is possible to modify the level of ESR by using Trager therapy. This stretch reflex inhibition may induce a reduction of the muscle rigidity seen in these patients. The present results may eventually lead to the development of a specific complementary therapy for patients with Parkinson’s disease and rigidity.

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