TY - JOUR
T1 - Take it sitting down
T2 - the effect of body posture on cortical potentials during free viewing—A mobile EEG recording study
AU - Soto, Vicente
AU - Tyson-Carr, John
AU - Kokmotou, Katerina
AU - Roberts, Hannah
AU - Byrne, Adam
AU - Hewitt, Danielle
AU - Fallon, Nicholas
AU - Giesbrecht, Timo
AU - Stancak, Andrej
N1 - Publisher Copyright:
Copyright © 2024 Soto, Tyson-Carr, Kokmotou, Roberts, Byrne, Hewitt, Fallon, Giesbrecht and Stancak.
PY - 2024
Y1 - 2024
N2 - Brain imaging performed in natural settings is known as mobile brain and body imaging (MoBI). One of the features which distinguishes MoBI and laboratory-based experiments is the body posture. Previous studies pointed to mechanical, autonomic, cortical and cognitive differences between upright stance and sitting or reclining. The purpose of this study was to analyse effects of posture on eye-movement related potentials (EMRP) recorded during free viewing of human faces. A 64-channel wireless EEG was recorded from 14 participants in either standing or reclining postures while they freely viewed pictures of emotional faces displaying fear, anger, sadness, and a neutral emotional state. Eye tracking data was used to insert triggers corresponding to the instant at which the gaze first landed on a face. Spatial filtering of the EEG data was performed using a group independent component analysis (ICA). Grand average EMRPs displayed the post-saccadic lambda component and the face-sensitive N170/vertex positive potential (VPP) complex. The lambda component but not the N170 component was stronger during reclining than upright posture. Emotional expression of faces showed no effects on EMRP components or subjective ratings. Results suggest that posture primarily affects early components of EMRPs recorded using wireless EEG recordings during free viewing of faces. Thus, findings from evoked potential data obtained in seated individuals, e.g., in laboratory experiments, should be interpreted with caution in MoBI experiments with posture affecting primarily the early latency component.
AB - Brain imaging performed in natural settings is known as mobile brain and body imaging (MoBI). One of the features which distinguishes MoBI and laboratory-based experiments is the body posture. Previous studies pointed to mechanical, autonomic, cortical and cognitive differences between upright stance and sitting or reclining. The purpose of this study was to analyse effects of posture on eye-movement related potentials (EMRP) recorded during free viewing of human faces. A 64-channel wireless EEG was recorded from 14 participants in either standing or reclining postures while they freely viewed pictures of emotional faces displaying fear, anger, sadness, and a neutral emotional state. Eye tracking data was used to insert triggers corresponding to the instant at which the gaze first landed on a face. Spatial filtering of the EEG data was performed using a group independent component analysis (ICA). Grand average EMRPs displayed the post-saccadic lambda component and the face-sensitive N170/vertex positive potential (VPP) complex. The lambda component but not the N170 component was stronger during reclining than upright posture. Emotional expression of faces showed no effects on EMRP components or subjective ratings. Results suggest that posture primarily affects early components of EMRPs recorded using wireless EEG recordings during free viewing of faces. Thus, findings from evoked potential data obtained in seated individuals, e.g., in laboratory experiments, should be interpreted with caution in MoBI experiments with posture affecting primarily the early latency component.
KW - EEG
KW - N170
KW - body posture
KW - eye-movement related potentials
KW - mobile brain imaging
UR - http://www.scopus.com/inward/record.url?scp=85211618857&partnerID=8YFLogxK
U2 - 10.3389/fnins.2024.1492427
DO - 10.3389/fnins.2024.1492427
M3 - Article
AN - SCOPUS:85211618857
SN - 1662-4548
VL - 18
JO - Frontiers in Neuroscience
JF - Frontiers in Neuroscience
M1 - 1492427
ER -