title: Evaluation and comparison of effective connectivity during simple and compound limb motor imagery.
abstract: Motor imagery (MI) has been demonstrated beneficial in motor rehabilitation in patients with movement disorders. In contrast with simple limb motor imagery, less work was reported about the effective connectivity networks of compound limb motor imagery which involves several parts of limbs. This work aimed to investigate the differences of information flow patterns between simple limb motor imagery and compound limb motor imagery. Ten subjects participated in the experiment involving three tasks of simple limb motor imagery (left hand, right hand, feet) and three tasks of compound limb motor imagery (both hands, left hand combined with right foot, right hand combined with left foot). The causal interactions among different neural regions were evaluated by Short-time Directed Transfer Function (SDTF). Quite different from the networks of simple limb motor imagery, more effective interactions overlying larger brain regions were observed during compound limb motor imagery. These results imply that there exist significant differences in the patterns of EEG activity flow between simple limb motor imagery and compound limb motor imagery, which present more complex networks and could be utilized in motor rehabilitation for more benefit in patients with movement disorders.
authors.forename: Weibo
authors.initials: W
authors.lastname: Yi
authors.forename: Lixin
authors.initials: L
authors.lastname: Zhang
authors.forename: Kun
authors.initials: K
authors.lastname: Wang
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Xiao
authors.forename: Feng
authors.initials: F
authors.lastname: He
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
authors.forename: Hongzhi
authors.initials: H
authors.lastname: Qi
authors.forename: Peng
authors.initials: P
authors.lastname: Zhou
authors.forename: Baikun
authors.initials: B
authors.lastname: Wan
authors.forename: Dong
authors.initials: D
authors.lastname: Ming
mesh_terms: D000328:Adult; D001132:Arm / Q000502:physiology; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods*; D004566:Electrodes; D004569:Electroencephalography; D005260:Female; D006225:Hand / Q000502:physiology; D064368:Healthy Volunteers; D006801:Humans; D019018:Imagery, Psychotherapy; D007092:Imagination; D007866:Leg / Q000502:physiology*; D008297:Male; D008959:Models, Neurological; D015233:Models, Statistical; D009048:Motor Skills / Q000502:physiology*; D009068:Movement; D012815:Signal Processing, Computer-Assisted; D055815:Young Adult