TY - JOUR
T1 - Modulation of cortical activity in response to visually induced postural perturbation
T2 - combined VR and EEG study.
AU - Slobounov, Semyon
AU - Teel, Elizabeth
AU - Newell, Karl M.
PY - 2013/6/28
Y1 - 2013/6/28
N2 - There is evidence from EEG studies that unexpected perturbations to standing posture induce a differential modulation of cortical activity compared to self-initiated and/or predictable conditions. However, the neural correlates of whole body postural response to visually induced perturbations on standing posture have not been examined. Here we employ a novel experimental paradigm via combined virtual reality (VR) and EEG measures to examine the effects of visually induced perturbations on the dynamics of postural responses. Twelve Penn State student-athletes without prior history of neurologic disorders and/or orthopaedic injuries participated in this study. There were no differences in response/reaction time measures between both spatially and temporally unpredictable and fully predictable conditions (p>.05). However, significantly stronger modulation of frontal-central EEG theta activity was present prior to onset of unpredictable postural perturbations (p<.05). It is postulated that enhanced EEG theta in unpredictable conditions reflects increased effort to recruit additional brain resources to meet the demands of the postural tasks.
AB - There is evidence from EEG studies that unexpected perturbations to standing posture induce a differential modulation of cortical activity compared to self-initiated and/or predictable conditions. However, the neural correlates of whole body postural response to visually induced perturbations on standing posture have not been examined. Here we employ a novel experimental paradigm via combined virtual reality (VR) and EEG measures to examine the effects of visually induced perturbations on the dynamics of postural responses. Twelve Penn State student-athletes without prior history of neurologic disorders and/or orthopaedic injuries participated in this study. There were no differences in response/reaction time measures between both spatially and temporally unpredictable and fully predictable conditions (p>.05). However, significantly stronger modulation of frontal-central EEG theta activity was present prior to onset of unpredictable postural perturbations (p<.05). It is postulated that enhanced EEG theta in unpredictable conditions reflects increased effort to recruit additional brain resources to meet the demands of the postural tasks.
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U2 - 10.1016/j.neulet.2013.05.001
DO - 10.1016/j.neulet.2013.05.001
M3 - Article
C2 - 23665528
AN - SCOPUS:84892419546
SN - 0304-3940
VL - 547
SP - 6
EP - 9
JO - Neuroscience Letters
JF - Neuroscience Letters
ER -