Introduction
Postural orientation requires the integration of vestibular, visual, and somatosensory information. Perception of the body in space also enables postural control and body movements [The effect of NMV on postural orientation differs during and after stimulation [The subjective straight ahead (SSA), a measurement that indicates the error between the objective midline of the body and subjective midline of perception, has been used as an index of midline perception in the horizontal plane [The effect of NMV is enhanced by increasing the amplitude [Thus, this study aimed to clarify the effects of NMV on standing postural orientation and spatial perception in the same healthy participants, depending on differences in stimulation duration and simultaneous stimulation of trunk muscles.