| Objective To evaluate objectively the functional status of muscles of trunk muscle for stroke patients by analyzing the the sEMG signals. Meanwhile, we observed the effect on the reconstruction of trunk muscle function through observing the modulated medium frequency therapy on selected acupoints Methods 44 patients with stroke and 44 healthy volunteers matched with age and sex were studied, collecting trunk muscles'sEMG signals, extracted eigenvalue analysis.In reference to evidence-based medicine standards,44 cases of patients were designed into two groups:control group (conventional rehabilitation group) and IF group (rehabilitation-modulation medium frequency group). When the 44 cases of stroke patients were in supine position, the sEMG signals of agonistic muscle, synergist and antagonistic muscle were collected during flexion of trunk muscle.Then,sEMG-characteristic value extracted was comparatively studied between the unaffected side and the affected side of patients'trunk muscle. The clinical effect of each group was evaluated by the sEMG, Fulg-Meyer assessment of balance function, trunk control test (TCT) and ADL Barthel index scale. The clinical experiment was lasted for 40 days, treatment 20 min per times and 1 times per day. Results Compared with the right side trunk muscle of the healthy control group, both for during the exercise and after relaxation,both sides of agonistic muscle of the hemiplegic patients with stroke's MAX, RMS values decreased(P<0.01), the affected side and the unaffected side's the drop percent of MAX value are 68.37% and 23.73%, the drop percent of RMS value are 36.18% and 16.85%(P<0.01);greater than the unaffected side(P<0.01); the MAX, RMS value of both sides of congenerous muscles and antagonistic muscle increased, the increasing percent of MAX value are 16.80% and 253.72% on the affected and unaffected side congenerous muscles, the increasing percent of RMS value are 44.63% and 305.00%(P<0.01) the increasing percent of MAX value are25.09% and 75.22% on the affected and unaffected side antagonistic muscle, the increasing percent of RMS value are 23.68% and 85.34%(P<0.01) greater than the unaffected side(P<0.01). The percent increase of the MAX, RMS value of the unaffected side is greater than the affected side(P<0.01). The both sides of patients'the agonist/congener, agonist/antagonist and the agonist+congener/antagonist ratio values are declining (P<0.05), the congener/antagonist ratio values increased (P<0.05). Compared with the unaffected side, the agonist/congener ratio of the MAX value, agonist+congener/antagonist ratio values and congener/antagonist ratio value of RMS value on the unaffected side is lower. comparing the both side of patients's the agonist+congener/antagonist ratio values is no statistical significance (P>0.05)。②A comparison in control group and the IF group,the MAX and RMS of the trunk muscles, congener/agonist ratio, TCT Scale, Fugl-Meyer balance scale, ADL scale before the treatment showed no statistical significant difference, which is comparable (P>0.05); and the two groups characteristic value and scale scores were increased after treatment, while congener/agonist ratio value was decreased.Conclusion①Bilateral agonistic muscles in stroke patients decreased muscle contractility when flexion of trunk muscles,and the affacted side decreased significantly;Bilateralcongenerous muscles and the antagonist muscles contraction ability are increased compensatively especially the unaffacted side increased significantly; Bilateral trunk muscles in stroke patients with the same of abnormal movement patterns.②Modulation frequency electrical stimulation acupoints combined with routine rehabilitation therapy,can improve the abnormal movement patterns of trunk muscle of stroke patients,improve trunk control,balance, and activities of daily living in stroke patients. The effect of flexion functional recovery in trunk muscle of stroke patients is significant. |
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