Impact of Sudden Sit-Stand Postural Switch on Electroencephalogram

Postural changes are inevitable motor behavior and physiological phenomenon. The study recorded electroencephalographic findings characterizing sudden switch from sitting to standing posture. 15 young adult males who satisfied inclusion criteria were recruited for the study. Baseline electroencephalographic tracings were obtained using Powerlab 26T at sitting position using scalp electrodes and during sudden switch from sitting to standing. The results of the study revealed sudden switch from sitting had no significant effect on alpha wave amplitude, beta wave amplitude and beta wave frequency. However, both alpha wave frequency and alpha/beta ratio decreased with sudden switch from sitting to standing position. The findings of the study indicated that sudden sitting to standing posture caused reductions in alpha wave and alpha/beta ratio.