Sincronismo muscular en patrones de movimiento de miembros superiores descritos por Kabat: latencia al inicio del pico de la máxima activación electromiográfica

Abstract

IntroductionThe Kabat method argues that normal synchronism occurs from distal to proximal, which requires electromyographic evidence. ObjectiveTo describe the muscular timing of motor patterns of the upper limbs described by Kabat, in seated and supine positions, from the measurement of the latency at the beginning of the peak of the maximum electromyographic activation (BPM-EMG-A) of selected muscles. Material and methodsA comparative analytical study was carried out. Twenty men and 20 women between 19 and 26 years old were evaluated. Each participant performed 3active repetitions without external resistance of each of the movement patterns (flexor and extensor) of the 2diagonals. BPM-EMG-A latency was recorded for each of the 8muscles tested in the 4movement patterns, both supine and seated. These were averaged and ordered from lowest to highest to obtain the sequence of muscle contractions in each movement pattern. The sequences obtained for each pattern in seated and supine were compared and the existence of correlations between them was assessed. ResultsSignificant correlation was observed in the BPM-EMG-A sequences between supine and seated positions, in all movement patterns (P<0.05), except in the extensor pattern of the first diagonal (P=0.139). There were no statistically significant differences between positions in any of the patterns (P>0.05). ConclusionAlthough with variations in BPM-EMG-A, muscle timing was generally found from proximal to distal, more evident in the sitting position and in flexor patterns.