Related Experiment Video
Updated: Jul 3, 2026
Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
Published on: March 18, 2019
Effects of allocation of visuo-spatial attention to visual stimuli triggering unilateral arm abduction on
Hidehito Tomita1, Katsuo Fujiwara
1Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa 920-8640, Japan.
Objective:
We investigated the effects of allocation of visuo-spatial attention to visual stimuli triggering arm movement on anticipatory postural control.
Methods:
Fourteen healthy right-handed subjects participated in the study. Visual stimuli were randomly presented to the left or right visual field on a screen. An attention-directing cue or a non-directional cue was presented at 1000ms before visual stimulus onset. Subjects focused or divided visuo-spatial attention (focused- and divided-attention conditions, respectively) based on types of cues, and abducted the left or right arm rapidly in response to target stimuli (with 30% probability of visual stimuli) according to the side of presentation. Peak-to-peak amplitude of P1 and N1 components of event-related potentials (P1-N1 amplitude) elicited by visual stimuli and activation timing of postural muscles with respect to the middle deltoid were measured.
Results:
Compared with divided-attention condition, in focused-attention condition P1-N1 amplitude at occipital electrodes was enhanced and activation of the left hip abductors during right arm abduction was hastened. A significant correlation was observed between the attention-related changes in these two measurements.
Conclusions:
Anticipatory postural control during right arm abduction was influenced by attention-related modulation of sensory-perceptual processing.
Significance:
These findings are important for understanding of the effects of visuo-spatial attention on anticipatory postural control.
